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Old 10-16-2022, 07:46 PM
rumb rumb is offline
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Join Date: Apr 2008
Posts: 317
"By "parallel," rumb means, is the height of the head, the same in front, as at the rear"


not just F to R, but also "thickness" side to side.

There is a minimum thickness spec for these. Shim are available for the cam towers if the head get shorter. If you have to shave the top of the head the cam gets closer to the valves and has to be corrected.

Loosen the head bolts that hold the cam down first and evenly, then you can just do all the rest.

If your head ends up unusable I think I have a local source on a 280 head.


As mentioned do a wet/dry compression test first to see if the rings are still good. Either way when you take the head off you can measure the bores.


My personal experience is that the M130 line of engines only really last 100K miles and then everything is worn out on them (except the bearing shell -they always seem to be in excellent shape.)
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