thunderace
|
| posted on 18/9/08 at 10:09 PM |
|
|
is 40 psi difrence in comp ok
is 40 psi difrence in comp ok
have just done a comp test on a golf 18 16v kr for a pal one is 190pis and the lowest comp is 160psi is this ok.
|
|
|
|
|
westf27
|
| posted on 18/9/08 at 10:16 PM |
|
|
assuming no leaks on test equipment then that is suggesting somethings happening.Put small quantity ofoil into the low bore pressure and repeat test
on cylinder.if its better then probs rings/piston,if not probs burnt exhaust valve.
555
|
|
|
andylancaster3000
|
| posted on 18/9/08 at 10:33 PM |
|
|
We've had a similar problem a number of times now and that delta in pressures has been due to the head gasket. Looks like your head will have to
come off i'm afraid to say. 
|
|
|
Danozeman
|
| posted on 19/9/08 at 05:48 AM |
|
|
Youv got a prob as said. Follow what westf27 says to eliminate the rings.
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
|
|
|
Mr Whippy
|
| posted on 19/9/08 at 06:37 AM |
|
|
too much of a difference unfortunately, if the two center cylinders have the lowest pressure then it will be the gasket as the gap between them is the
smallest and hottest area
|
|
|
02GF74
|
| posted on 19/9/08 at 06:52 AM |
|
|
is it just me but I make it 30 psi difference.
|
|
|
procomp
|
| posted on 19/9/08 at 07:13 AM |
|
|
Hi for a test to give better indication of where the pressure is being lost try and find someone who can do a leak down test. This will give you the
exact % being lost and exactly where it is being lost.
It will still be a head off job eventually but will give you a better idea of where to look if the problem is not so obvious.
Cheers Matt
|
|
|
Mr Whippy
|
| posted on 19/9/08 at 07:34 AM |
|
|
quote:
Originally posted by 02GF74
is it just me but I make it 30 psi difference.
must be some sort of error factor...
|
|
|
britishtrident
|
| posted on 19/9/08 at 07:37 AM |
|
|
My guess would be a valve but ideally do Leak down test --- if is actually posible to make a DIY leak down tester instructions are somewhere out on
the web.
|
|
|
