Case gasket

[beaglebriar]

OK fellas I have this old 930 that I'm working on and I need to make a case gasket. Apparently there's either none left on the planet or nobody wants to part with one. My question is what material do I use and what thickness? I could wing it but I'd rather get it right the first time.

 

[shawn022]

I use the dark gray fel-pro gasket material. It's holding most of my 9xx series jreds together. I just did an 801 and 80 with it in the last month or so.

 

[beaglebriar]

I use the dark gray fel-pro gasket material. It's holding most of my 9xx series jreds together. I just did an 801 and 80 with it in the last month or so.

Where do you get it and what thickness? I'm sure the thickness isn't super critical but I'm anal about chit like that.

 

[shawn022]

It's part number 3157
26" x 10" x 1/32"
I get it from autozone or advanced but have seen it elsewhere too.

 

[beaglebriar]

Beautiful. Thanks for the help.

 

[shawn022]

Not a problem. Have you made case gaskets before? If you need any help let me know.

 

[beaglebriar]

Not a problem. Have you made case gaskets before? If you need any help let me know.

Nope. Any pointers would be appreciated. Looks like this one will take a little time to cut out.

 

[shawn022]

I trace out the outside of the case, gasket side down on the gasket paper, the case bolt holes and the inside of the actual crankcase area with a pencil. Cut out the outside shape with a razor blade and punch out your case bolt holes. I use a leather punch set. The kind you hit with a hammer not the plier type. If you don't have a punch set, use a shell casing of the appropriate caliber.
As for the inside of the fuel and oil tanks and possibly the inside of the crankcase if you couldnt get in there to trace it, lay the gasket paper on the case half and secure it in place with the case bolts. I usually use the unthreaded case half and just slide the bolts in as opposed to having to thread them in.
Then go around the inside edge of the case with a hammer tapping on the gasket material to create an indention in the gasket material. The old timers called this peening a gasket.
Use the indention as a guide to cut out the inside portions. You do not need to be as exact as the factory gasket was. I leave extra material in the upper front corner of the oil tank as it can get a little thin there.

 

[shawn022]

It takes me about 15 minutes to make one. The last saw I did was the 80 and the old gasket came out whole so I traced it. That actually took longer and was more of a pain than doing it from scratch.

 

[Milkman31]

X2 on peening

 

[beaglebriar]

OK thanks for the advice. I'll get on it in a day or two and I'll post the results.

 

[beaglebriar]

Well I finally got a little time tonight and here's what I came up with. I spread a thin layer of 518 on a case half and pressed it on the gasket material. I think with a few tweaks it will work real good. Next time I will put a thin layer of padding under the gasket material. Took a couple tries to get a complete transfer of the outline without it. It'll take a couple minutes to finish cutting it out but it's gonna work just fine.

 

[Motorhead]

That's What I call dedication.

 

[beaglebriar]

Well when you're working with these old saws I guess there's no other option. Improvise, Macguyver... whatever it takes.

 

[beaglebriar]

Finished product...

 

[shawn022]

Nice work. You can save the scraps and cut intake gaskets and such out of them. Nothing worse than having to order one oddball gasket to complete a repair.

 

[beaglebriar]

Yeah that's what I was thinking. There's probably enough to make another case gasket on the roll. Found it at Advance auto like you said. Thanks again.

 

[jacob j.]

I wish I had seen this thread before- I bought four NOS gaskets off of ebay and at the very least I would have scanned one for you or traced it out on gasket paper.

 

[beaglebriar]

If I ever need to do another I'll be hittin' you up JJ.

 

[Tor R]

Speaking about gaskets, anyone has link and recomendion to quality gaskets with different tickness, if possible Amazon links.
Think I have 1.00mm, 0.80mm, 0.55mm, 0.40mm, could use some thinner gaskets........