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Thread: Compression Questions

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Posts: 1-10 of 17
2011-10-20 16:33:07
#1
Compression Questions
My mechanic just called me and said my compression was 150 across expect for cylinder 3 which is 120 is this bad??
2011-10-20 16:35:42
#2
yes they should be very close to each other
2011-10-20 16:38:42
#3
All four should be around the same.
2011-10-20 16:44:49
#4
so how can this be fixed then??
2011-10-20 16:47:58
#5
Depends on what's causing the leak and what other symptoms you're having. The fix is either a new headgasket or new piston rings.
2011-10-20 16:50:53
#6
ask your mechanic thats what you pay him for
2011-10-20 17:11:44
#7
Besides what is mentioned, it could also be an issue with the valves seating on the lower cylinder. It will most likely have to be pulled apart to find the issue but you could do a leak down test and get a better idea of whats going on. If you are going to fix it, you will need to pull it apart anyway.
2011-10-20 17:21:44
#8
Originally Posted by Harris
Depends on what's causing the leak and what other symptoms you're having. The fix is either a new headgasket or new piston rings.


already put new head gasket, im leaning more towards the piston rings so im gonna have to talk to him to find out exactly what it is feels like it never ending problems with this motor swap and its stock
2011-10-20 18:12:37
#9
Originally Posted by morgans432
ask your mechanic thats what you pay him for





So wha was the reason for the compression test?
2011-10-20 18:16:15
#10
gas mixed in with the oil he wanted to check to make sure everything was ok. he said its nothing to really be to concerned with right now but this is my first build from scratch and with all the money i spent and monthes the car has been of the road just wanted a second opinion
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