I have a 1995 mustang cobra. just rebuilt engine 500 miles ago. it suddenly started overheating, iremoved the thermostat but it still overheats any suggestions?
Retension the head studs if you did not clean out the stud holes before fitting the head it is very possible that the oil/water gunk in the holes is locking the bolt and achieving tension setting without achieving the proper tension on the gasket so after a period of use the gasket fails run a compression test first another point is when rebuilding an engine it is always advisable to have the head skimmed to ensure that it is not warped when tensioning down a head you must follow the tightening sequence so that the gasket is compressed evenly if you covered all these points then look for ignition timing ( close to tdc or after tdc)or air fuel ratio problems as late timing or a lean mixture will overheat
Answers & Comments
Retension the head studs
if you did not clean out the stud holes before fitting the head it is very possible that the oil/water gunk in the holes is locking the bolt and achieving tension setting without achieving the proper tension on the gasket so after a period of use the gasket fails
run a compression test first
another point is when rebuilding an engine it is always advisable to have the head skimmed to ensure that it is not warped
when tensioning down a head you must follow the tightening sequence so that the gasket is compressed evenly
if you covered all these points then look for ignition timing ( close to tdc or after tdc)or air fuel ratio problems as late timing or a lean mixture will overheat