Are they always this bad??
Are they always this bad??
Author
Discussion

petery

Original Poster:

357 posts

241 months

Saturday 30th July 2011
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Bought a chim 500 in April 4 days after the engine failed needing a full rebuild (pistons, liners, cams etc. etc. )
Got it back on Monday done 350 miles in it this week running the new engine in not going above 4k rpm and the engines got another problem. a slight ticking from the top of the engine along with the a misfire almost sounding like its back firing into the top of the engine.

Any idea what the problem could be?

Jammy Dodger

2,449 posts

186 months

Saturday 30th July 2011
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The builder by the sound of it !

where are you based ?

pk500

1,975 posts

243 months

Saturday 30th July 2011
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best take it back too who ever done the engine, must be some sort of warantee with it

petery

Original Poster:

357 posts

241 months

Saturday 30th July 2011
quotequote all
it is going back to the guys that did the work on Monday.
Just very annoying having spent a fortune on it and hoping to drive it to Cornwall on Monday frown

scotty_d

6,795 posts

225 months

Saturday 30th July 2011
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I would be back at the person who built it right now asking the very same questions.

Derek Smith

49,985 posts

279 months

Saturday 30th July 2011
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It could be something simple, like timing going off. It wouldn't be the first time the bolt at the bottom of the distributor wasn't tightened (I know!). Of a plug lead not securely fixed, that sort of thing.

But I'm with the others. It is something that the builders should look into.

haircutmike

22,511 posts

235 months

Saturday 30th July 2011
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The tick sounds like an exhaust gasket.

Misfire could be a loose lead.

spend

12,581 posts

282 months

Saturday 30th July 2011
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Try making sure the plug leads are firmly on first wink

Looking at the engine running in the dark can be the quick way to trace any HT 'snap crackle & pops'

Alexdaredevilz

5,697 posts

210 months

Saturday 30th July 2011
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Take it back!

ray von

3,062 posts

283 months

Saturday 30th July 2011
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Did you get forged pistons fitted? I did on mine and it was as noisey as when the engine was shagged. If your car has been getting fixed since April you may have took your car to the same place as me. biglaugh

Chilliman

12,434 posts

192 months

Sunday 31st July 2011
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petery said:
Bought a chim 500 in April 4 days after the engine failed needing a full rebuild (pistons, liners, cams etc. etc. )
Ditto, well almost, managed 2.5k miles before it needed stripping.. You have my utmost sympathy...

900T-R

20,406 posts

288 months

Sunday 31st July 2011
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Must say between you two, Chris 71 and a couple of others on here having suffered catastrophic failures recently on 500s there's quite a bit of bad luck to go around lately. frown

However, having your engine expire again shortly after a rebuild is not bad luck - it's a clear sign of a major cock-up in the build - unless the driver specifically has been out to break the engine or asked for (and got) the cheapest possible repair against the builder's better judgement. It's not like the RV8 is an unknown quantity in any way or shape...

spend

12,581 posts

282 months

Sunday 31st July 2011
quotequote all
900T-R said:
Must say between you two, Chris 71 and a couple of others on here having suffered catastrophic failures recently on 500s there's quite a bit of bad luck to go around lately. frown

However, having your engine expire again shortly after a rebuild is not bad luck - it's a clear sign of a major cock-up in the build - unless the driver specifically has been out to break the engine or asked for (and got) the cheapest possible repair against the builder's better judgement. It's not like the RV8 is an unknown quantity in any way or shape...
You can't blame builders for things like missing to engage the oil pump, or insufficient/unsuitable lubrication...

AFIK the most recent catastrophic failures have been with 4.6's & LS's, as well as plenty of 4.0's & 4.6's.. apart from Mooses 5 litre which seems to have some hidden glitch which TBH could happen with anyone...

There are a lot of service parts an RV8's that have been historically problematic, eg rocker arm pads / rocker shafts / sticky lifters... you can't really blame engine builders for getting caught out with those things either. You just thank God that it wasn't you and hope you are aware of all the pitfalls when collecting components to assemble ~ however often we see folks buying 'cheapest' stuff off ebay / britpart etc...

Have you any idea of the cost it would be for an engine builder to check every tolerance in an engine, engine builders are still subject to the 80/20 rule otherwise you could be faced with £10000+ labour bills just for stripping / inspecting / QA of your used parts before any real service started????

Jammy Dodger

2,449 posts

186 months

Sunday 31st July 2011
quotequote all
spend said:
You can't blame builders for things like missing to engage the oil pump, or insufficient/unsuitable lubrication...

AFIK the most recent catastrophic failures have been with 4.6's & LS's, as well as plenty of 4.0's & 4.6's.. apart from Mooses 5 litre which seems to have some hidden glitch which TBH could happen with anyone...

There are a lot of service parts an RV8's that have been historically problematic, eg rocker arm pads / rocker shafts / sticky lifters... you can't really blame engine builders for getting caught out with those things either. You just thank God that it wasn't you and hope you are aware of all the pitfalls when collecting components to assemble ~ however often we see folks buying 'cheapest' stuff off ebay / britpart etc...

Have you any idea of the cost it would be for an engine builder to check every tolerance in an engine, engine builders are still subject to the 80/20 rule otherwise you could be faced with £10000+ labour bills just for stripping / inspecting / QA of your used parts before any real service started????
... besides, they certainly did have off days at the factory.

my 500 had covered only 28000 miles when, on a whim, I decided to supercharge it and - for belt & braces - make some internals improvements.

The week before the build began I took the car to TVR power for dyno. Nice smooth power curve, nice flat torque curve, 245bhp at the wheels, 270 torque atw (so a genuine 300bhp at the fly). By all accounts as strong and healthy a 500 engine as you'll ever see, way above average. BUT it was about to go bang.... no symptoms, no warning, could have gone at literally any time.

Here's a picture of my cam chain sprocket...... Jamie says it was simply poorly installed back in 98 at the factory...

ETA - weirdly, the cam (often considered a weak spot) was only showing the slightest beginnings of wear to one lobe - go figure !



So, to answer your question - yes, as a rule, they're all like that.

However - if you can face spending between £7k and £15k (depending on desired power output) across the engine, brakes and suspension, you'll end up with between 40 to 120 more horsepower than you started with, in a car that goes, stops, steers, rides and handles as it should.

Despite the pain of the expense, console yourself that, all in, it will still be good value for the performance achieved, compared to the alternatives.

Edited by Jammy Dodger on Sunday 31st July 10:38

Ribol

11,995 posts

289 months

Sunday 31st July 2011
quotequote all
Jammy Dodger said:
Here's a picture of my cam chain sprocket...... Jamie says it was simply poorly installed back in 98 at the factory...
Just out of interest, how does one poorly install a cam chain sprocket?

Jammy Dodger

2,449 posts

186 months

Sunday 31st July 2011
quotequote all
Ribol said:
Just out of interest, how does one poorly install a cam chain sprocket?
no idea ! - i figured it would slot on where it should and that's that... Perhaps it just wasn't "seated" properly.

I asked Jamie the question and his response was "off day at the factory"

Ribol

11,995 posts

289 months

Sunday 31st July 2011
quotequote all
Jammy Dodger said:
Ribol said:
Just out of interest, how does one poorly install a cam chain sprocket?
no idea ! - i figured it would slot on where it should and that's that... Perhaps it just wasn't "seated" properly.
rofl

Jammy Dodger

2,449 posts

186 months

Sunday 31st July 2011
quotequote all
Ribol said:
rofl:
Ummm, of course I've got no idea, I'm not a mechanic or engineer, never suggested otherwise !

And come on Quinny, there's no comparison - yours looks brand spanking new compared to mine, which had covered 27% fewer miles...

So Jamie must've made it up, he hasn't got a clue when it comes to RV8s, obviously....

Those championship winning engines he builds, I guess he must just buy them in from Rob...

Edited by Jammy Dodger on Sunday 31st July 11:23

Jammy Dodger

2,449 posts

186 months

Sunday 31st July 2011
quotequote all

it must be possible to install it improperly, surely, even if it's a question of under/over tightening the fitment/directly related fitment ?

I can understand how that wouldn't affect the hardness of the material, but it would affect how the stresses it's subject to are applied

Ribol

11,995 posts

289 months

Sunday 31st July 2011
quotequote all
Quinny said:
A failure like that could be down to a number of things.......poor lubrication, poor servicing, faulty manufacture, incorrect hardening process, old fashioned wear and tea, and some others I'm probably not aware of....
Faulty speedo with sticking mileometer hehe