RobHayes
Member
Registered: 6th Sep 03
Location: Lincolnshire
User status: Offline
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hi guys, as some may know i had a problem with a smokey engine.
as suggested on here i did a compression test with a friend.
we got a reading of 16bar off all cylinders, which we both agreed seemed high.
the engine is a c16xe, with 45mm taper throttle bodies, im not sure if the head has been skimmed to raise the compression or anything.
is it possible to have bought a faulty guage?
any help would be appreciated, cheers
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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that 232psi! i would say a tad high!! what are the normally, about 150psi? even if the head was skimmed i doubt it would be that high!! id hope it was a dodgy tester
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RobHayes
Member
Registered: 6th Sep 03
Location: Lincolnshire
User status: Offline
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haynes says compression ratio of 11:1
which makes my reading 5bar high :S
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Ed Renshaw
Member
Registered: 2nd Dec 99
Location: Lincoln
User status: Offline
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Probably the piston rings - same thing happened in my GSi.
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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that would make the compression low........?
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Ed Renshaw
Member
Registered: 2nd Dec 99
Location: Lincoln
User status: Offline
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I had smokey engine syndrome - had the cylinder head stripped, ported and polished. Built it all up, and it still smoked! Had the bottom end done, which cured it and gave the engine a new lease of life (obviously!). The piston rings were completely gone!
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RobHayes
Member
Registered: 6th Sep 03
Location: Lincolnshire
User status: Offline
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but thats an expensive job, thinking of searching for a nice smoke grey GSi, low mileage, non smoker etc etc, and swap the TBs over
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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quote:
Originally posted by RobHayes
but thats an expensive job, thinking of searching for a nice smoke grey GSi, low mileage, non smoker etc etc, and swap the TBs over
orrr sell me you tb's
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Ed Renshaw
Member
Registered: 2nd Dec 99
Location: Lincoln
User status: Offline
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My rebuild cost me £1250- top job aswell. That included lightened flywheel aswell.
I think the only way to stop the problem is to sort your own engine out before doing any mods.
That's my opinion.
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ainsley_brader
Member
Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline
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if you find another c16xe itll probably still smoke, think vauxhall built them that way!
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James R
Member
Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
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11:1 is 6 bar, cause you add one for the atomsphere, that's a spot on reading  The most important thing is that they're the same. Also heat in the engine will cause the rpessure to be slightly raised.
I'd check if your breather is clogged first and see if the oil breather can vent ok, otherwise could cause the stem seals to have vapour forced out. Miles had this, he cleaned it out and was fine after.
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