1970 BMW 2002 ITBs

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EddyBee

Original Poster:

241 posts

169 months

Monday 15th August 2016
quotequote all
Camoradi said:
Hi Ed,

I was at Llandow on Saturday and I have to say it was your car which caught my eye out of the four BMWs pictured. Sounded superb as you thrashed it down the straight.

Very nice indeed.
Cheers bud!

What car were you in? There was a good contrast of cars there.

Mark, that's interesting. Going to have to look into it. If you have any info about whether it'll fit in the tunnel etc that'd be great.... Off to google.

EddyBee

Original Poster:

241 posts

169 months

Wednesday 17th August 2016
quotequote all
Gearbox is out!

Up on sticks


Removing the bellhousing bolts


The culprit!


Was a bit of a pig to remove, some of the nuts on the output shaft were rounded so I filed a 16mm spanner to fit.

Got it all separated from the engine but it wouldn't fit through the gap between the firewall/transmission tunnel & the exhaust.
Ended up loosening the exhaust manifold and jacking the front of the engine up.
Don't fancy fitting it on my own.

Forgot to take a pic of the removed box, but it wasn't anything exciting!

It's currently being stripped down to see what's up with it.

EddyBee

Original Poster:

241 posts

169 months

Friday 25th November 2016
quotequote all
Update time...
Unsure if people are interested as it's not the most exciting build on PH but at least I can log everything here.

After getting the gearbox back from being rebuilt it was found that I needed 2 bearings replacing. However the crunch in 3rd was still there and it started to develop when changing down into 2nd too.

There was nothing obvious when the GB was apart and It was agreed that when I pulled the engine in winter it'd go back to be opened up again.

Fast forward to November and I thought I'd go to Mallory park for one last track day before the engine rebuild.

I changed the brake pads a week before and started using the car for work so I could bed them in.

2 days before the track day the car was pulling heavily to the left so I pulled the right wheel off to see what was up and found the oil cooler had burst and soaked the pads in oil!

[URL=http://thumbsnap.com/TncTK2hx]



Determined to make the track day I pulled out the oil cooler connected the hoses together so the oil just looped back into the engine.

I then managed to get some pads and fit them the night before Mallory.



Unfortunately it kept over heating after 1 or 2 laps due to the lack of oil cooler.
However it was still a good day and I narrowly avoided the wall after at spin at the hairpin.


Looks like that rebuild is needed!

Today a mate and I took the gearbox and engine out.




Bonnet off for access


Stripping of ITBs and ancillaries.


It's out! Was a bit of a pig to get out but we managed.


I'll put it on the engine stand tomorrow so I can start work.


For the rebuild I'm not changing pistons and rods as per my original plan.
This is partly due to cost and partly because I'd like to try rebuilding it myself as I've never done it & don't want to cut my teeth with a few grands worth of custom engine parts!

So it's just strip and rebuild the head, the piston rings and the bottom end bearings.
Progress will be slow as I've never stripped and built an engine before.

I went to retro engineering today to pic up some bits ( will upload a photo later) & drop my gearbox off.

I bought;
Big end bearings
Full gasket set
Piston rings
Mocal Cast oil cooler (supposed to be a lot stronger than the one I burst)
Windage plate & additional sump gasket
Rear main oil seal

Once I've stripped the head the valve guides will be checked and I'll also get some valve stem seals (retro eng didn't have these in
stock As I have an e30 318 head)

Left on the list to get is;
"Tropical" radiator and maybe a better fan.
Thermostat sandwich plate for the oil cooler
Get the sump baffled.
Cam sprocket drilled and slotted for timing

If anyone has any advice at all I'm all ears.

Edited by EddyBee on Friday 25th November 23:16

EddyBee

Original Poster:

241 posts

169 months

Saturday 26th November 2016
quotequote all
Nigel from retro engineering has recommended I use millers 10w40 fully synthetic.

I'd love an s14 crank however they're very expensive.
Mind you with the engine upgrades on hold I'll keep an eye out.



EddyBee

Original Poster:

241 posts

169 months

Wednesday 14th December 2016
quotequote all
Scottos definitely get one, they're such good fun. A few people can't understand why I sold my S2K for one until they see it or come for a ride in it. Ok it's no as fast but it's so much more fun!

Slightly bald; I bought some e21 recaros only the drivers one is fitted at the moment as I need the webbing strap hooks for the passenger seat base. They also need a retrim but will do for now.

Power wise it's 150bhp at the moment hopefully I'll see a bit of an increase on that when I've got some more compression (new piston rings)
I'm only doing a refresh at this point, unless I find anything badly worn when I strip the engine.

I've done a few bits to the engine but nothing worth posting up at the moment. Just doing bits and bobs after work, however 12 hour shifts don't give me much play time.

Hopefully by the weekend i'll have done enough to be worth updating.

EddyBee

Original Poster:

241 posts

169 months

Sunday 18th December 2016
quotequote all
Managed to get a fair bit done this weekend.

You'll have to excuse the mess in my garage I need to sort it out!

I've taken loads of pictures but they're not all that interesting just the same engine with some bits removed.

Sump removed
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Clutch & fly wheel off
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Clutch looks to be in quite good condition
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Rocker cover removed (mug for size haha)
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Cam pulley removed and sent to retro engineering to be slotted as vernier pulleys aren't available off the shelf
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Head off. There's a lot of carbon build up but all normal apparently.
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Turned the engine round so I could remove a rod cap and inspect the bearings
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Now the fun bit. Removing the rockers.

Find the biggest drift you have.
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Loosen all the adjusters on the rockers and open up the valve clearances.
Remove the 8 circlips (1 per rocker) from under the retaining washers (hard to see but they're to the right of the picture on the rocker shaft)
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Circlips
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Hammer the rocker shafts out of the head then get annoyed as your long drift isn't long enough.
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Label and individually bag the rockers & components
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Adapt and overcome lack of drift length and remove all the rockers
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Pull the cam out
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I really enjoyed stripping the engine down. Feels like I'm making progress

I'll be taking the head to retro engineering to see if the valve guides need doing. They're also going to take a look at the rod bearing as I don't know what sort of wear is normal. Then they can advise how far I take the rebuild (i have new rod bearings but if the mains need doing I may upgrade a few more bits)

Sorry for such a long post but I'm a complete novice to engine stripping/rebuilding so it's a big learning curve for me.
If anyone has any tips (or questions) I'm all ears.

EddyBee

Original Poster:

241 posts

169 months

Friday 30th December 2016
quotequote all
There was no excessive wear on the big end or main bearings so that's good news. They'll still be replaced mind

However it seems my valve guides are ok & so are the stem seals.
Oil may be getting out around the valve guides.
Apparently this can happen if guides aren't cleaned properly before removal.
Carbon build up on them broaches the head as they're knocked out creating a gap for oil to leak through.
I'll find out more after the head is cleaned....


Engine is finally fully stripped!
Again I'll apologise as the pictures will just be of the same old engine minus a few components and me trying to avoid saying "*insert engine part* removed"

Valve compressor ordered & put use.

Unfortunately the tool wasn't deep enough so I had to put a socket on it to get a bit more reach.
Fine for removing the collets but will be no good for installation.


The head was now fully disassembled and I dropped it off for soda blasting along with the valves. (Forgot to get pics after blasting. Will take some later)


Onto the bottom end.
Crank pulley removed (I really need to throw that oil cooler away)


Water pump impeller is quite rusty. I'll see if it can be cleaned up, if not I'll probably get a new one.


Cam chain & oil pump chain

Chain guide is split so will have to be renewed.


Here's where I ran into a problem.
The sprocket for the oil pump should be held on with a locking tab, mine was welded on & the chain has no removable links. This meant I couldn't remove it as there wasn't enough slack to slip the chain off.

I didn't want to damage the pump as I was unsure which pump I have & some are expensive.
Tried to drill a link out of the chain with a cobalt drill bit and it just laughed. Absolutely nothing happened! I thought I'd continue with the rest of the engine & come back to this later.


Took the Pistons out.
The piston rings are very different to the replacement ones I have so I may not have '02 Pistons. I'll have to find out.


Back to the pump.
I was going to cut the chain off, however I could just about get a 17mm spanner in to undo the main bearing caps. This meant I could remove the crank with the pump.
I can't reinstall it this way as I won't be able to torque the cap however it'll give me time to workout if my pump is an expensive m3 one or standard.
I could put a chain on with a removable link but I've been advised against it


Crank removed


Empty block!





Hopefully I'll find time today to steam clean the block & find out what Pistons & oil pump I have.

Next on the cards is to work out my compression ratio by measuring the volume of the combustion chambers the piston dome/protrusion above deck height, crushed head gasket height cylinder volume, stroke etc
I'll write it up as I do it as I can't remember it all off hand. It's written down for when I do it.

Once this is done I can give the figures to retro engineering and they'll work out what can be skimmed off the head.

EddyBee

Original Poster:

241 posts

169 months

Friday 30th December 2016
quotequote all
Cheers Mark. I did the llandow track day with James and got some welding done at his place.

Retro Engineering use an m3 pump
In their racing m10 engines & according to them that's the pump I have so I'll have to try and grind the welds off the nut to remove the sprocket.

Edited by EddyBee on Friday 30th December 20:09


Edited by EddyBee on Friday 30th December 20:10

EddyBee

Original Poster:

241 posts

169 months

Wednesday 25th January 2017
quotequote all
Scottos, I don't think James at JFI sells cars anymore. He builds cars for customers but doesn't seem to build one without a buyer already in place (if that makes sense?) An idea may be to try and find a car and get him to mod it?
Or keep an eye on the 02 forum (which by yours posts over there I'm guessing you are)
If you find yourself near the Midlands let me know and you can come for a spin.

Mark you owe me a few days of my life back!
I'm about half way through graham bahr's 57 page E30 thread! It's a great read (although this is dry sumped so i haven't even found what i was looking for!) although i've salvaged my pump now.

I got the head back from soda blasting so i was off to Retro Engineering to borrow their industrial jet wash to clean the old oil and grime off the block and clean the soda off the head.

Head Before

After

Block before

After (crap pic i know i was cold & wet)


Block was left at Retro Eng to be honed and to get rid of a few blemishes in the cylinder walls

Whilst i was waiting for the block to be honed I thought I'd spray the Rocker cover.
A few coats of PJ1 high temp textured paint and i think it looks quite smart.

Dry



I got a call to say the block had been honed & i could pop in to work out the compression ratio of the engine, and try to figure out I was going to do rebuild wise.

Armed with some equations I'd found online (And Nigel who builds racing cars) I started trying to figure out what the CR was.

Starting with the combustion chambers


I didn't get many pictures of me doing the block


Maths! (I'm sure the majority of you know more about this than myself, but if anyone wants to know the process just ask and i'll try my best to explain what i learned)


CR worked out to be a hair over 10:1 (which i believe is standard)
My goal is 11.3:1 or 11.4:1.
As for upgrades a few people may think this is over kill or a waste, however I've thought about it for the last few months and i have a plan! (i'm still open to ideas mind so feel free to suggest something else)
The plan is to get longer rods and high compression pistons made along with a head skim, but leave the head how it is (apart from guides and seals)

Reasons being that to go any further with the head I'd need a lumpier cam which means I'd to buy billet rockers.
I could do this but if later on i want more power I'll have to strip the bottom end again.
This way allows me to build a good solid bottom end to work from. Over time I can build up another head with a bigger cam and billet rockers, then swap the heads at a later date.
I'd like to do it all at once but I just can't afford to do it. I'd also like an M3 crank, but they're pretty expensive too!

I'm fully aware sticking with an M10 isn't the easiest or cheapest way to get more power but I really don't want to change the engine.

In non engine related news I've managed to get hold of an early front grill & early kidney grill I just need an early centre section of the front panel.
Grill will look like this:


I'm also off to America next month so i'm taking full advantage of being over there and I've ordered a Carpet, as a girl out there makes them to order. It's being delivered to where I'm staying and will be coming home my suitcase!
I've gone for the same as what was originally fitted like in this pic (obviously in RHD)
https://2.bp.blogspot.com/-7CTfwdBfZh8/WBP_ZHP52oI...

As I've said before I'm new to all this engine stuff and Retro Engineering have been a great help teaching me how to measure my CR, giving advice and lending me their jet wash!



Edited by EddyBee on Wednesday 25th January 00:48

EddyBee

Original Poster:

241 posts

169 months

Friday 28th July 2017
quotequote all
Long time no update!
I'll go back and sort all the photo bucket mess out later.

In short I've had long delays with getting Pistons made which has a knock on effect as it means I can't get the machining done on my block until they arrive.

However it has meant I could get along with the rest of the car.
Might not be the most interesting update but it'll bring my build to date.
I'll try and keep this in order but it's hard to keep track.

My front grills arrived they need a little shaping, but will be sent away at some point for de-anodising and then re-anodising. This will be some other time as they wont be going on for a while. (I've also go hold of NOS black slats)





We had our holiday in New York and my carpet I ordered was waiting in the room for me. The carpet is superb quality and a great match to the original colour.





The block needed paint striping and the core plugs removing so again REL (retro engineering ltd) lent me their jet wash.




My biggest dislike in the car was the hydraulic handbrake. I didn't trust it, it looked out of place, it didn't ratchet, the lock on it rattled at high rpm and once I'd fitted my new carpet if I put a normal handbrake in I'd have holes where this used to be.
It was going!


As I have e21 trailing arms and e30 rear brakes everything aft of the handbrake lever needed to be e21 parts.
These aren't cheap!
In all it cost around £250, that's for new backing plates, new cables, new shoes, 2nd hand expanding locks and 2nd hand cable supports. Luckily I had the handle and the ratchet mechanism as they were stupidly expensive.

The joys of trying to remove the rear wheel bearings with no gearbox or engine fitted.


They were tight!


Stupid disc retaining screws drilled out.

Stud easy outed


All fitted

New rear discs and pads installed too


The fan for the blower doesn't work which is a common fault with these. There's a few write ups on replacing the fan, but a lot of confusion as to what actually works especially on earlier cars like mine.
Instead of ordering a fan from the states that I couldn't even get a picture of I just chopped the old one off and installed a 6" spal radiator fan which I won on eBay for a bargain (they're £70 new!)
Heater box with original fan

Heater box split then Fan and fan cage chopped off

All build back up with new foam on the vent flaps, new seals and the fan fitted

More man hours than I care to think about went into that bloody blower, it fits and clears the wiper linkage by a few millimetres.

New extra capacity rad mounted with rivnuts.


Setrab oil cooler to replace the Mocal one that popped (the Mocal industrial one was too big)


Thermostat sandwich plate to stop cold oil flowing through the cooler


I was never happy with the way the rad fan was mounted, it was off set and picked up on the same bolts the rad was fitted with.
I replaced it with a 12" spal fan then bought some mounts, bent them and trimmed to fit.

Glued Some rubber to the mounting face so it doesn't chafe the slam panel

With oil cooler in place


This brings me to around a month ago when I could finally start fitting the carpet.
A few sheets of silent coat to take out some vibrations. Left over from my friends camper build.


It's a great match to the original


Then on to sticking (ignore the top edge, when the rear bench is in place and the top folds over it'll be straight. Honest!)


I'll be honest, although the carpet is a very good fit, I hated fitting it.
My missus on the other hand loved it so we both fitted it together. It'll be trimmed to fit round the cage

The old brake bias adjuster kept sticking so that got changed for a new one.
I made a little bracket up for it and ran some new brake lines.

Then the carpet could be fitted over the transmission tunnel. I was dreading this, thinking I was going to get brake fluid all over the carpet. I haven't fitted the drivers & passengers floor mats yet so no pictures of the whole carpet yet.

Unfortunately the drivers side over mat doesn't fit. The woman that made the carpet (Esty) is used to making LHD carpets for the US market and they have floor mounted pedals, so mirroring the LHD mat hasn't worked. I sent her an email just to let her know, and she's going to send me a new mat out, cover postage costs and offered to refund me the cost of the mat set.
As I only paid for front mats and go the rears for free I declined the refund.


I'd helped out retro engineering at Donington Historic with 2 BMW 1800s they were racing. They came 1st in class at the u2tc (I don't think it was due to me though!)




In return they did the valve guides on my head and they'll skim it too.
I popped in last week to lap my valves in then pressure test them.



Then I snapped a stud when removing them, balls. It wouldn't easy out, so I had to drill it and collapse it, turned out ok though.


After all this I didn't really want to fit the tatty e21 Recaros but quotes for trimming them were coming in at ~£900.
I was going to put the original seats back in as a stop gap however I still wasn't 100% convinced with the Recaros . I also couldn't think of a way to trim them and match the blue door cards whilst still looking good ( changing the door cards for black would be difficult as they don't come up for sale all that often and when they do they're pricey)

I started looking at cobra classic seats and popped into GSM who sell them to take a look. They're really comfy, well made and a fraction of the cost of some Recaros classic replicas (like sportsseats.com) albeit not quite up to their levels of quality.

GSM have been great and lent me a seat to try out and make sure it fits.
This is the same shape of seat I'm having, but without the quilting on the bolsters and with a dark blue chord centre. I should have them in the next few weeks.



Sample of the chord against the recaro chord, it's darker in real life, should look good.


All I need now is to do the front discs and pads, bleed the brakes, sort some fittings and oil hose out for the cooler and I'm set!
Oh and an engine!


Edited by EddyBee on Friday 28th July 17:32

EddyBee

Original Poster:

241 posts

169 months

Friday 29th September 2017
quotequote all
Just a small update.

I bought a Gunson eezi blender so I could bleed the brakes on my own.

After fitting the bias adjuster on top of my new carpet I was paranoid about leaks, so I dropped the pressure down to 15psi and set to work.

Quick leak check and all seemed fine, then POP! brake fluid was squirting everywhere.
I'd completely forgotten that the clutch uses the same reservoir and I'd pressurised the slave cylinder. Having no release fork to contact with it just fired the piston out across my driveway!




Luckily I got the hose pipe out and sprayed everything down before the fluid started eating my paint.

I removed the slave cylinder, blanked the hose off and finished the brakes off feeling like a right plonker.

New discs and pads.


Because of the ECU and some other non standard wiring the left hand window heat duct was never plumbed in. I couldn't use the standard diameter hose as it fouled on the wiring so I bodged in a smaller diameter hose and taped it up

Like I say it's a bit of a bodge but at least I'll be able to demist that side of the window (the ecu isn't hanging by the wires, I just used some spare cable I had to hand to tie it up with)

Exhaust manifold wrapped, i'm going to bake them for a bit then seal it with high temp paint.


Seats have arrived!


Really pleased with them, been worried the blue would be a bit too much but I think it works.

I drew some mounts that would bolt to the existing rails so I could keep the forward and aft adjustment. It also means I can get in the back when needed as the new seats don't tilt.


A friend of mine cut and welded the mounts for me.

Holes drilled with a pillar drill I won on eBay for £29!


These cars have a habit of having an offset driving position when you don't use standard seats. With these mounts I could position the drivers seat more inboard on so the driving position is central. The passenger seat will be mounted slightly outboard for more elbow room.

Seats look even better in place I'm really pleased with them.



Scottos on here who is building his 2002tii (https://www.pistonheads.com/gassing/topic.asp?t=1685552) has offered me his rear bench so I'm going to get that fitted around the rollcage and trimmed in the same fabric as the fronts.
I know the back seats are unusable with a cage but i like the look, reminds me of classic touring cars.

My block has finally been bored and honed so I gave it another jet wash (3rd time!)
It's nice and clean now, It was filthy.

All masked up ready for paint.

Primed

Painted


The race engines that Retro Engineering build are sealed on the inside with Glyptal.
This seals the block, helps oil return and stops oil foaming on the rough surfaces.
My block probably doesn't need it, however Nigel had some left over, it looks neater and "because race car".




Cleaning the over spray/Glyptal and the bearing seats


Main caps



I also got the head back from machining too.


The crank, rods, flywheel and pistons are off getting balanced. All being well I should be assembling it all when I get back off holiday in a week or so.

I took the horrible foam socks off my throttle bodies to check what length trumpets I have to find this mess.

Trumpets are 60mm but as you can see they're battered. Think they'll be changed for some 90mm ones and I'll fit an ITG back plate and dome filter.
The IAT sensor that's mounted in the trumpet was never wired in. I'm not up to scratch with what's needed for an ECU so I don't know if I need to measure IAT (it seemed to run ok with out it) but if I do the sensor will be mounted in the filter backing plate.

That's where I'm up to at the moment.
I'm hoping my next update will be the engine assembled.




EddyBee

Original Poster:

241 posts

169 months

Friday 29th September 2017
quotequote all
helix402 said:
What a lovely M10, remember the days when BMW could build a good 4 cylinder? (ok maybe the latest turbo 4s are ok-time will tell). None of this N43 etc nonsense.
Too right.
This is what makes me want to keep my M10 engine (it's a really good read if anyone is interested) arguably one of the most important BMW engines made IMO.

Admittedly I don't have an M12 16v head on mine but I haven't got a spare £25k laying round!

EddyBee

Original Poster:

241 posts

169 months

Saturday 30th September 2017
quotequote all
Mark you can't get rid of the M3 it's awesome.
I'm hoping to see it if either of us make a track day next year!

Jay: I've seen a few "s2002s" online. It'd be great on track. Wish I could have an s2000 gear change with an M10 engine though!