Plenum off

Plenum off

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jindle

Original Poster:

246 posts

124 months

Friday 10th April 2015
quotequote all
Any advice on taking the plenum off (hopefully this sunday)?

Other than the allen bolts it looks like i'll need to separate the throttle, but there are two or three places it appears i could make that separation - any clue which is going to cause the least problems?

There was a website a while ago with some good info but it has disappeared!

Cheers

rev-erend

21,404 posts

283 months

Friday 10th April 2015
quotequote all
Undo the plenum Allen bolts a few turns, then use a lever bar between plenum inlet and rocker cover to crack the seal. Then remove the bolts.

mrzigazaga

18,534 posts

164 months

Friday 10th April 2015
quotequote all
I think the throttle linkage is just the shackle and the big nut on the adjuster removed ...Don't loose any bits though....Fitting is reversal of removal but use some Blue Hylomar to bead a seal around the joining face..You may as well clean the idle air valve on the side...(Wind it nearly all the way out..Although makes sure its not right on the end or the nut can come off)..This will also need a bead of sealant...Try to replace the gasket..I used gasket paper for mine...

Wedg1e

26,760 posts

264 months

Friday 10th April 2015
quotequote all
jindle said:
Any advice on taking the plenum off (hopefully this sunday)?

Other than the allen bolts it looks like i'll need to separate the throttle, but there are two or three places it appears i could make that separation - any clue which is going to cause the least problems?

There was a website a while ago with some good info but it has disappeared!

Cheers
Any particular reason for taking it off or just curious? biggrin

Essentially you can remove it for a look inside by just disconnecting the cold start injector (hose and electrical plug), the inlet air hose from the throttle body, vacuum line for the distributor from the top of the throttle body and the vacuum line from the over-run valve at the rear, hen whip out the 6 bolts... you can leave the throttle cable and throttle heater hoses attached. Anything further will need the heater hoses and throttle cable off, of course.
All this assumes a V8, incidentally.

jindle

Original Poster:

246 posts

124 months

Friday 10th April 2015
quotequote all
Wedg1e said:
Any particular reason for taking it off or just curious? biggrin
Spring clean and a bit of tarting

rev-erend

21,404 posts

283 months

Friday 10th April 2015
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Sounds like someone got a die grinder for Christmas or fancies making some fancy trumpets biggrin

adam quantrill

11,535 posts

241 months

Friday 10th April 2015
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I have a stock of the proper trumpet glue if you need some.

mrzigazaga

18,534 posts

164 months

Friday 10th April 2015
quotequote all
adam quantrill said:
I have a stock of the proper trumpet glue if you need some.
Ahhhh..Is that a small bottle of clear gum stuff...I think i may of had some of you at the fest...If it is then thats answered that one...smile

adam quantrill

11,535 posts

241 months

Friday 10th April 2015
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It's a grey bottle, with a red Loctite label. The goo itself is green.

jindle

Original Poster:

246 posts

124 months

Saturday 11th April 2015
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Sadly nothing that interesting, just noticed the intake was quite dirty and imagine it's much worse below. Also a nasty build up of old leaves that I can't get to. And freshly painted rockers

honestjohntoo

576 posts

215 months

Sunday 12th April 2015
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jindle said:
Spring clean and a bit of tarting
Hello jindle, Quite right, I couldn't agree more. “Look after your Plenum and your Plenum will look after you!”

Eight pages - everything you'll ever need to know about looking after your Efi Plenum Chamber. Open the PDF from this link.

http://www.vintagemodelairplane.com/pages/Rover_Te...

Then, to further expand your interest, read all the stuff on this Efi archive.

http://www.vintagemodelairplane.com/pages/Rover_Te...

Have fun!





jindle

Original Poster:

246 posts

124 months

Sunday 12th April 2015
quotequote all
That was pretty easy wasn't it. I undid the nut on the linkage for the throttle assembly, easy. Two hoses on the bottom for the hot spot were a bit of a nightmare, but it's free now.

Thanks john I'll give that a read. Lots of black goo around my trumpets and crud caked onto the issue of the hose from the flame trap so I'm sure there's loads more to do.


Campbell

2,499 posts

282 months

Sunday 12th April 2015
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Got mine off to the powder coaters at the moment, very easy to remove

mrzigazaga

18,534 posts

164 months

Sunday 12th April 2015
quotequote all
When was the last time the flame trap mesh was cleaned/Changed?...Also the breather on the N/S rocker cover should be checked as its easily blocked...To remove the mushroom that the gauge and cover sits on is best done when the engine has been warmed a bit...Or you will bend it trying to remove it even though its a push fit.


jindle

Original Poster:

246 posts

124 months

Monday 13th April 2015
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Breather and flame trap done a few months ago. Fresh rocker covers on now. Just need to strip and clean the plenum up and maybe new springs for the throttle assembly as they are a little rusty.

adam quantrill

11,535 posts

241 months

Monday 13th April 2015
quotequote all
Quite often, when there are tell-tale signs of crud buildup, you would also be well advised to clean out the breather pipe itself and the gallery that it plugs into in the plenum.

For the pipe I found it much easier to cut it in half to really get the goo out, and the two halves can be joined by pushing over three inches of 15mm plumbing tubing with barely a noticeable join.

The gallery is a bit more fiddly, as it goes round corners. In the past I have blown a cotton thread through the hole, and then attached a string to this. Then you can tie a small rag to the string half-way along and apply some petrol, then pull it back through the hole about 10 times or until it isn't getting gungy.

The reason for cleaning here is that the gallery is usually cooler and the first point that the goo condenses onto. In the past I have had the gallery block up on one car, and the pipe on another. It's usually worth checking every 30k or so. When either blocks up you start to get oil leaks.

Edited by adam quantrill on Monday 13th April 19:49

jindle

Original Poster:

246 posts

124 months

Tuesday 14th April 2015
quotequote all
Various rags, wire hanger, pipe cleaners, and an array of solvents and degreasers at the ready. The pipe from the flame trap was atrocious, I'm sure others are going to be as bad.

JVaughan

6,025 posts

282 months

Friday 17th April 2015
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Stick it in the dish washer ...

jindle

Original Poster:

246 posts

124 months

Friday 17th April 2015
quotequote all
JVaughan said:
Stick it in the dish washer ...
hmmmm... i can see that going horribly wrong for me