Re: Minimum compression?

Home › Forum › Ask A Member › Minimum compression? › Re: Minimum compression?

October 18, 2015 at 11:50 pm #25717
chris-p
Participant

    As stated, the 9.5 are low compression motors. They wont have high compression readings. All the ones I have worked on were around 65 to 85 or so.

    Check the head gasket, might be damaged between cylinders, giving overall low reading in both. Check to see if rings are stuck, if so, seafoam or OMC engine tuner will help.