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compression check on a 1500

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RocknTommy

RocknTommy

Senior Member
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What is acceptable compression on a 1500 engine.
I do not see this in the Haynes manual.
Thanks!
 
jlaird

jlaird

Great Pumpkin
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No clue but most engines seem to have between 170 and 190 fresh. Anything below about 130 and you should think about a rebuild.
 
B

Bugeye58

Yoda
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On the 1500, anything above about 100 should be OK. The main thing to pay attention to is the variance between cylinders. Anything over 10~15% is cause for concern. For instance, if you have 115-80-80-115, it could indicate a head gasket problem between #2 & #3. Or,a low reading on only one hole could be a burned valve. These are just random examples.
Jeff
 
jlaird

jlaird

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/bcforum/images/%%GRAEMLIN_URL%%/iagree.gif Much to learn from a wet and a dry compression check. Need to see the numbers both ways to understand.
 
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