Cylinder Compression
Hello
I looked up the compression test in my Haynes and Chilton's manuals.
A few things..
1: It says that no one cylinder should be X% lower then another... However it does not give a xyz is good like it did for my old Dodge Shadow.
2: Both the Haynes and Chilton's manuals include a catch 22.
a Do not remove the spark plug until the engine is cooled down, or you can damage the head.
b Warm he engine up to normal operating tempature, then remove the plugs to test the cylinders.
So how is one to accomplish the compression check? And
What are some descent and good numbers. Im sure all my
piston rings will wear prety much the same through normal use
and eventualy not make compression, but then if they are all
worn the same, the compressions will be close enough and thus
be considered "GOOD"
I looked up the compression test in my Haynes and Chilton's manuals.
A few things..
1: It says that no one cylinder should be X% lower then another... However it does not give a xyz is good like it did for my old Dodge Shadow.
2: Both the Haynes and Chilton's manuals include a catch 22.
a Do not remove the spark plug until the engine is cooled down, or you can damage the head.
b Warm he engine up to normal operating tempature, then remove the plugs to test the cylinders.
So how is one to accomplish the compression check? And
What are some descent and good numbers. Im sure all my
piston rings will wear prety much the same through normal use
and eventualy not make compression, but then if they are all
worn the same, the compressions will be close enough and thus
be considered "GOOD"
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Jesse
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Sep 28, 2015 12:51 PM



