About a month ago I ordered and installed the new external oil
line due to seeing a small oil leak
on rear of the 3qm30 engine
right where line follows head/block joint. On testing it looked good in terms of stopping the leak.
Unfortunately it seems the test needed to run longer because I was checking engine
over the other day and noticed oil leak back in same spot. So evidently while my external oil line needed changing as it was deeply rusted, the leak comes from elsewhere. I am now suspecting the head
to block joint and wondering if there is any approach to this prior to a new head gasket
I have no experience tightening head bolts but I am wondering if this vintage 1978 might benefit from taking valve cover off and making sure head bolts are in spec. I have a torque wrench and the manual which describes tightening order and torque spec but I was wishing to hear from someone with more experience in terms of the likelihood i could get a fix by torquing the head bolts or if this is a bite the bullet and change head gasket