View Full Version : cylinder pressure low
707V6BUICKMAN
08-12-2010, 08:35 PM
got low cylinder pressure
1) 150 3)75 5)125
2)150 4)150 6)145
man what should i do think guy who built motor couple years back sucked...
what should i or can i do?
Ts86ttype
08-15-2010, 11:21 AM
It could be a head gasket issue with # 3 and # 5 cylinder... A cylinder leak down test would be a good way to find out just what is going on with those two cylinders... Tom G.
707V6BUICKMAN
08-16-2010, 11:31 PM
cool thanks so much
kenmosher
08-17-2010, 09:23 AM
Could be:
Blown headgasket on #3 (seems to be the most common cylinder)
Bent pushrod/valve not sealing (leak down will help isolate that)
Cracked/broken ring or piston (from detonation)... usually that will cause mechanical noise as well
Warped valve (especially on the exhaust side) from too lean/too much boost
707V6BUICKMAN
08-18-2010, 01:48 AM
yeah i did have boost way too high at one point..
i hope head gasket but think valve issue
im gonna keep my fingers crossed :dunno:
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