09-26-2018, 05:21 AM
I bet the head was not milled right (or shaved, even flat head we do tiny clean up cut , or it fails down the road)
or cheap $5 head gasket no felpro
then pressure test the head, did he, a real machine shop does that step 1, after all why dump cash/labor in useless head, answer they dont.
RA resurfacing rules. head and deck.
. The typical recommendation today for an aluminum head on an OHC bi-metal engine is a surface finish of 30 to 60 RA, with the preferred range usually being from 50 to 60 RA.ot milled same as head to the same surfacing spec.
a great page covering details like this is here
http://www.rlengines.com/Web_Pages/Cylin...gines.html
or cheap $5 head gasket no felpro
then pressure test the head, did he, a real machine shop does that step 1, after all why dump cash/labor in useless head, answer they dont.
RA resurfacing rules. head and deck.
. The typical recommendation today for an aluminum head on an OHC bi-metal engine is a surface finish of 30 to 60 RA, with the preferred range usually being from 50 to 60 RA.ot milled same as head to the same surfacing spec.
a great page covering details like this is here
http://www.rlengines.com/Web_Pages/Cylin...gines.html
http://www.fixkick.com