0.50 mm base gaskets/shims exist. I have a set in my parts bin.

I've lapped the cylinder to the head for better mating on turbo engines. It's nothing new.

I'm glad it wasn't a crack. I can appreciate the fact that resources are limited. It is tough enough in the US finding good reliable shops. One learns and moves on. You've come to the right place.

Where in Mexico?

Years ago I was working in Mexico City and following a very nice lunch and a couple shots the guy I was with, knew I was into old Porsches took me to a warehouse close to where we ate to show me one of his clients' cars. Amazed I saw 904s, a 962, 908, can't remember them all. Story on the guy is he did work for Porsche AG and asked for old race cars as part of his compensation for his work.
Can't tell you more. My mind wants to say there was a 917 in the mix, but may be my feeble mine playing tricks on me. We all make mistakes, hopefully yours won't be too costly.

"0.50 mm base gaskets/shims exist. I have a set in my parts bin.

I've lapped the cylinder to the head for better mating on turbo engines. It's nothing new.'

I realize that. The part number he quoted is a head gasket. So use it as a base gasket and cut the head to clean it up and set deck height is what he is saying I guess.

Rusty356,
There are no original 917s down here, there is an Australian 917 "replica" with a six cylinder engine. There is a 962, 904's I am not sure, there are replicas. In Mexico City no 908s, in the north there is one 910. I think I know the collection you are talking about, did they have a Daytona Roadrunner ? 356s there are many, some Carreras with Fuhrmann engines, 911 many, 914 many, 930s some.
But reliable mechanics very very few, the so called 911 experts are VWs mechanics that happened to rebuild a 911 engine and had luck, they do not have the knowledge nor the experience. That is why we are experimenting and did this rebuild.

You have come to the right place. There are several SC/Carrera engine rebuilds on this forum.
You can order Wayne's "How to rebuild 911 motors". It has detailed info on rebuilding these motors.

We used Wayne's book as a guide to rebuild this engine.

Translation
 

It must be the English to Spanish translation that was confusing.

I don't think Fred's describing the use of the 930.104.381.01 as a base gasket. The part number applies to 964 turbo 3.3L engines. It's used as a head gasket between the top of the cylinder and the head and that's how Fred described his use of it.

Here's where it's shown in the parts diagram #8 is 930.104.381.01 for the M30.69 3.3L engine



http://forums.pelicanparts.com/uploa...1481666915.jpg
http://forums.pelicanparts.com/uploa...1481666921.jpg

Since a 964 3.3L doesn't use a base gasket, that takes 0.25mm below the cylinder out of the equation?

I haven't used a head gasket in a type 4 in 20 years. There was a VW bulletin telling dealers to stop using the head gasket.
There is arguments about this bulletin, but I've never had a single issue running without head gaskets on any engine I've built.
In fact you can't use the head gasket on a performance engine build with bigger than stock pistons.

BTW my personal '67 bug has a type 4 engine conversion that is 102 X 78mm (stock would be 94 X 71mm) that has no head gaskets.

That sounds like a stout motor.
I wish I had known this when I rebuilt my Vanagan back in the day. Would have helped up the CR as well. Did I mention having to replace the ones that failed after my first rebuild? But that is a story for another thread.

Thanks for sharing your expertise.
Remember we are rookies and all your answers help us to understand the complexity of the Porsche engines.

Oh Brother DonPorfi,

I feel your pain.

If the mechanic installed those gaskets, you will need to remove them, so sorry to write.

I am going thru a complete rebuild too on my 316,000+ miles 3.2.

In my case. Studs loosened and I lost compression on #4 and #6 & #3 were ready to pop as well.

130,000 is the limit on our cars. I spoke to the PO she was rebuilt @ 130,000 so I really pushed her beyond her limits 186,000 :eek:

Waiting on the verdict of my cylinders and Pistons, if bad going 3.4 with 98mm pistons

"I don't think Fred's describing the use of the 930.104.381.01 as a base gasket. The part number applies to 964 turbo 3.3L engines. It's used as a head gasket between the top of the cylinder and the head and that's how Fred described his use of it."

I agree. The tricky part would be opening up the gasket ID if necessary. A backing ring with an ID slightly larger than your bore could be made to put behind the gasket in a lathe chuck to support it. Then clamp the ring with just enough pressure to hold it without collapsing it then open up the ID to the bore you want.

head gasket
 

Hi,my machinist did a few hundred sets for me when I was in business.If you need his number send me a message.I believe he did 6 at a time.Fred