Thread: D2 Head Gaskets

Not being picky but you should have done a compression test before lifting the heads. That would have identified crook cylinders more accurately. Now that the heads are off I'd suggest removing the sump and popping out a few pistons. The bore in no.8 looks a little like it has blown by the top ring. The heads should be checked by a shop for flatness and surface hardness.

Don't discount the possibility that the crank sensor died with the heat and stopped injection and spark. The 4.0 I wrecked last year had a very melted looking knock sensor on it. The crank sensor didn't look too good either.

Oh and any valve stems sitting lower than the rest means a valve seat has come loose in the head, then they are basically scrap metal IMHO.

James
why did it overheat??
If you take the heads off rule of thumb is to have them serviced properly,skimmed,guide seals regrind valves and seats,crack tested,all usually around $350>>$400, for both heads plus gaskets.
as for the bottom end??how many K's??
any oil leaks,
a bit more info would help(Fotos)
cheers
Paul

Water leak from throttle body pre-heater caused the over heating. Was running water until leaks all found.
Kms is around 100k.
No obvious oil leaks and oil level half way between marks. Water and oil didnt mix. Sump was pressurized and pushed oil past head gaskets as far as I could tell.
James

Hi James, is this the 2nd hand motor I helped you with a couple of years ago?

Originally Posted by banarcus

Hi James, is this the 2nd hand motor I helped you with a couple of years ago?

Yes. Only just got it registered.

This is the driver side head with a unseated valve seat.





Cleaning the rockers before and after.

thats one unloved V8,,,

Well the heads will have to be done.Can you post up some pics of the bores with the pistons at the bottom