Tony

Im going to have my heads resurfaced to fix some corrosion i dont like the looks off. Picture shortly. Ive taken them to a shop and they said it could be fix. basically welding up the areas, then skimming the surface back down again.
If i recall i have .4mm (.015) to work with on the head..i have to recheck that again shortly.

Anyway...any BTDT..input..advice on this?

the gasket im running is .045" (1.143mm). Cometic layered steel.
Stock , from what i have read(manuals) and gathered, is 1mm with oversized to 1.4mm if needed.

heres the pics...may take a while to load..i tok them on a macro HQ setting.





the last one (above) i added what i think is the limiting factor in the amount of material that can be removed from the head.(.4mm) they sure dont leave much room! Check your coolant and change it offten is my advise!!



And please correct any info you see as wrong!!

UKKid35

Are you really that attached to using that head? Wouldn't it be easier and cheaper to get another one? How much can a single bare head cost - $200?

Tony

I dunno...i assume this is a bare head(below). I can get a LOT of work done for that amount...considering i can mine fixed for under 200.00

http://www.mailordercentral.com/928i...tem=8&mitem=13

UKKid35

Actually Tony, you don't want to use your heads anyway. Isn't this a project to get some real power gains? If so then the MY87 heads are not ideal, they can crack, check with Jon928se he can show you! The later heads have longer head bolts and reinforcement around the head bolt surfaces.

UKKid35

Technical Bulletin 8821 page 14 of the 1988 pdf

The cyclinder heads are 20mm thicker in the are of the bearing surface for the cylinder head mounting bolts

From engine numbers:
81 K 00121 Manual
81 K 05240 Auto

SteveM928

I assume the last part of those numbers refers to the serial number of the block, but does anyone know what the "81 K" part of the numbers mean? I have an "81 J" in my car.

Vilhuer

8 = 8 cylinder engine
1 = 928 5.0 ltr. worldwide
K = 1989 model year

J = 1988

It's likely that manual engine numbering started from 00001 and automatics from 05000. This would mean that manual to automatic manufacturing ratio was about 2:3 in 1989.

Regards,

Erkka

1992 928 GTS 5-speed N engine
Oak Green Metallic 22L
Classic Gray MX

Lizard928

I see no problem with that head, all the sealing surfaces are fine, if you are really worried about it maybe use the same techneque you used on the block to clean it all off then use some filled on certain sections (JBWeld?) and then just have a skim taken off to make sure that you dont have any bubbles on the surface and it is 100% flat