I am just going to fix it

[rgmrgm]

While I am in there i will do very little, My 83 sc had a cylinder leak that was very obvious under a heavy load. i assumed it was a broken head stud, 95k miles. Luckily I had a spare long block that i installed and it turned out to be a great runner. I now have the original engine apart and it had a cylinder leak but the head studs were fine.

seems the engine was previously apart ( blue rtv on oil cooler seals and case bolts) and i suspect one bolt on number 2 cyl head stud was not tightened properly which caused the head gasket to fail.





has alusil cylinders pistons and cylinders are in spec rings look good, gap is fine, piston lands are OK so i will clean and put the pistons and rings back in their original cylinders. I removed and replaced the dilvar studs with new steel studs.
rod and main bearings look fine so i will reinstall in their original locations.
i will use new rod bolts and nuts and send the heads off for a valve job




questions> local porsche wrench does not know of a good place to do my heads here in albuquerque so where is a good place to send them?

main and rod journals look good but should i send the crank out to be polished if i am reusing the old bearings.
am i making an fatal mistakes with my cheapskate approach?

[lindy 911]

The main bearing you show is toast. If I had the case apart, like you do, I'd spring for bearings. The "head gasket" you refer to isn't really a sealing gasket. I think your diagnosis of improper head bolt torque is probably right. Make sure the sealing surface of both the head and the cylinder is good and flat. The burnt one especially may need a little machine work touch up. It's this contact point of cylinder and head that's the seal, not the insert.

Not saying you're making fatal mistakes but judging the main bearing above to be "good" says to me you might want to get another set of eyeballs on the important parts. Aaron Burnham in SoCal does a good job on heads and is fair. There are some very good shops in Denver but I can't recommend anyone in particular.

[ddinham]

Sent you a PM

[GaryR]

Cases are split and you aren't putting new main and rod bearings in????

[john walker's workshop]

if you want to use the old cylinders again, which is fine for a "poorman's rebuild", if they are in spec, i would suggest having a machine shop dress the top edge and also flycut all the heads. the o-ring gasket is a fluid barrier, not a compression retaining head gasket. and that bearing looks wiped.

[Tippy]

"cgarr"

[dhagood]

a couple of other people have said it, but i'll say it again:

the bearing shell in your bottom picture should not look like that.

the gentleman posting as "john walker's workshop" said "and that bearing looks wiped." please listen.