Does anybody know a part number and where I can get an oil pan drain plug gasket? My 8BA V8 has a truck oil pan. The overhaul engine gasket kits come with a smaller diameter gasket for a car drain plug. I ordered a truck gasket from MACs and it was that same small diameter as a car drain.

Thanks, Bill

 

Buy gasket stock. Make one.
The kids at our local Auto Zone didn't even realize that they had several rolls of various types of gasket stock on their top shelf. So, you may need to poke around. It's just good stuff to keep on hand.

 

question for "hovarths" (sorry couldn't find a name). how do you cut out the gaskets? do you have some kind of punch , drill out center? i have that same issue, have tried several plumbing gaskets without much success. dick r.

 

You obviously got the wrong one. The proper gasket is 86H 6734 for the 7/8" plug. It should be a copper gasket. If you ordered the '53 plug combo, it's a 3/4" and won't fit. If you got a nylon gasket, it is for later model overhead engines.

 

At the risk of hijacking a perfectly good thread:
Gasket Making 101 | Hemmings Motor News

I have many punches and knives also. I'm a tool junkie. A tap-tap-tap with a hammer works wonders too. You tap at the edge of the place that needs to be gasketed. The hammer and part's edge will cut the gasket just as clean as can be. On threaded holes, light taps may be used to simply cause marks that may then be cut or punched. I also use rules, a compass, and shears. Get 'er done.

 

My oil plug seal is getting real long in the tooth, and has needed replaced for a long time. At last check, Mac's and the other major vendors did not have the 7/8" seal in stock, and did not know when they would get them in.

These older seals are nothing more than almost pure copper round bar stock that has been drilled for plug clearance. The use of copper for these plugs was two-fold: the seals were self-conforming when tightened, and thus seldom leaked, and they lasted a long time. You could squish them quite flat over a long period of use before they failed to seal. Too, although nylon had been invented, it was not yet in widespread use.

My suggestion is to obtain some copper bar, and make your own. I have thought about that myself, and will probably do so.

 

I saw it listed in Mac's catalog, but when I looked on line they said that it is no longer available and they have now removed the part number from the catalog.

 

OK folks here it is, not sure it will work, but it looks like the same thing. Copper Gasket (Crush Washer), ID 7/8", OD 1-1/8" (AN900-14) (5 per pack) - MS35769-18 - Aircraft Specialties Services

 

thanks, joe. once i get a look under mine to see if the fiber one i have in there is leaking, i'm guessing i'll be ordering a pack of copper ones. i'm willing to try it, dick r.

 

Seems this item is available at many aircraft parts suppliers.

 

Yes, I see Aircraft Spruce here in Corona, CA has the 7/8" ID washers for $.58 each.

AN900 COPPER GASKETS(CRUSH WASHERS) from Aircraft Spruce

 

Thanks heaps Joe, saves me from having to turn out a pile in my lathe (my machinist side says: Drat!).

Ordered 3 packs of five, so I will not have to worry about a seal for a long time, or at least till I misplace them like I have lost my spare generators, carbs, manifolds, gaskets, starters, etc. Tried to lose my spare flat V8, but it was too big to lose for long... found it awhile back.

 

Was it in the back buried under a pile of copper washers?