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

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

could be the beginngs of a head gasket issue too

. Did you notice if the spark plug was cleaner then the other plugs?

 

 

nipper

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...

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....

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