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Guest Message by DevFuse
 

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compression test on 92 leg.


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5 replies to this topic

#1 monstaru

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Posted 02 January 2006 - 08:47 PM

so i did a comp.test to see where it was at for a trade.
it was all good accepting cyl. 1.
1-50
2-155
3-160
4-155


i am thinking stuck valve.......any suggestions?thanks,brian

#2 gbrand

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Posted 02 January 2006 - 08:51 PM

burned or carboned valve maybe?

Try the wet compression trick, squirt in a little oil , and if compression raises it is a ring issue not valves. Let us know how you make out/fix of not/etc

#3 nipper

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Posted 03 January 2006 - 12:13 AM

could be the beginngs of a head gasket issue too
. Did you notice if the spark plug was cleaner then the other plugs?


nipper

#4 DerFahrer

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Posted 03 January 2006 - 12:16 AM

Could be a burnt exhaust valve. Any bad exhaust leaks in the Y-pipe?

Could be a headgasket. Have the coolant sniffed for exhaust hydrocarbons.

Could be the rings, although I doubt it. It's rare for one ring to go bad. Do the oil-squirt test to be 100% sure, but I still think it's one of the other two...

#5 monstaru

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Posted 03 January 2006 - 12:44 AM

the spark plug was actually dirtier than the other plugs, which iirc would suggest an exhaust valve stick?

there is a hiss from the y-pipe,do not know where though...could be further back though....

#6 AlpineRaven

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Posted 04 January 2006 - 04:15 AM

You'll need to do wet compression test before confirmation...

Another question - does it burn oil? or blow large amount of smoke at cold startup?

Cheers
AP




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