Hi all; Have the Perkins
at a machine shop for a rebuild
after blowing the head gasket
and the shop cannot find those combustion chamber inserts ( part # 37443591 or the insert washers, part # 0921249 ) Tried Foley and Tad and the web but no luck.
Seems like those 4 inserts were originally recessed too deeply and bent concave into the head, making a step or a gap that the head gasket
cannot fill properly and will blow out the next head gasket again.
Don't know if those existing combustion chamber inserts can be flattened out and re-tapped into place with a small hammer back into the recesses, I do know the manual says they can be removed from the face of the head by prying out with a curved tool, but this may squash the raised portion of the insert itself.
Re-facing the gasket surface to bring it flush with those inserts, although the head is not out of tolerances, is not allowed by Perkins
; they say.. 'no skimming allowed'.
There is another shop that has a different head already rebuilt; a 4.107 instead of the 4.108 that I need, for $350. I think the head bolt diameters are different in those two heads. Could I use the 4.107 head on my 4.108 engine
I would rather find new combustion chamber inserts to replace them. Does anybody know where? Thanks.