Air compressor head bolt torque

HWRC · Jan 30, 2013

I have a sears air compressor that blew the head gasket. I have a new gasket but do not know the correct torque to apply to the head bolts. The bolts are metric M6's (about 1/4 inch bolt size). They are screwed into the body and use lock washers under the bolt heads. I suspect these loosened somewhat to allow the gasket to blow. Would anyone venture a guess as to the torque on these bolts. Also, could I use lock tite to help secure them?
Thanks in advance!!!

NCWayne · Jan 30, 2013

Check the link for a chart of the max torque specs for the various sizes and grades of bolts. As far as the Loctite goes, you'll have to find some that will withstand the heat generated in the head and also one that will be removable should you need to do any future repairs. If you can figure out which one to use, it's not going to hurt, but properly torqued you shouldn't need anything else on them. I've worked on quite a few compressors over the years and never had a problem with the head bolts backing off when tightened properly.
Torque specs

Air compressor head bolt torque

HWRC

Member

NCWayne

Well-known Member

Similar threads