1964 oil pan drain plug sealing washer

[Jack J.]

What was/is the the type of washer used? Was it soft aluminum, copper or nylon? Thanks, Jack J.

[James W.]

Re: 1964 oil pan drain plug sealing washer

Opaque/white nylon.

James

What was/is the the type of washer used? Was it soft aluminum, copper or nylon? Thanks, Jack J.

[Duke W.]

Re: 1964 oil pan drain plug sealing washer

Good for judging, but they seep. I think GM has a better washer, same size, used on current engines that doesn't leak. Maybe Joe Lucia knows the number.

Duke

[Joe L.]

Re: 1964 oil pan drain plug sealing washer

Good for judging, but they seep. I think GM has a better washer, same size, used on current engines that doesn't leak. Maybe Joe Lucia knows the number.

Duke

Duke------


Yes, GM #14090908. They're better than the nylon but they still leak.

[Jack J.]

Re: 1964 oil pan drain plug sealing washer

Good for judging, but they seep. I think GM has a better washer, same size, used on current engines that doesn't leak. Maybe Joe Lucia knows the number.

Duke

[Duke W.]

Re: 1964 oil pan drain plug sealing washer

Duke------


Yes, GM #14090908. They're better than the nylon but they still leak.

Thanks, Joe. Wow I thought those current GM gaskets really didn't leak. Didn't the Fourtheenth Floor declare "NO LEAKS" back in the eighties?

My '88 MBZ uses a copper washer and the cast aluminum oil pan has a steel insert that the steel bolt fastens to. I doesn't seep, leak, whatever. Bone dry! My '91 MR2 uses what appears to be an aluminium gasket coated on both sides with a gasket material on the stamped steel pan and it too is bone dry.

Of course these gaskets are basically single use, but I can dress the MBZ copper washer on some 400 paper to cut down the galling and reuse them at least once. I've also reused a MR2 gasket, but I bought a big enough supply for both way back when that I probably have a lifetime supply. I just wanted to see if I could get away reusing them if I run out, so I save the old ones.

Is there an aftermarket equivalent of the GM gasket that I can buy at a local FLAPS like Pep Boys?

Duke

[Mark E.]

Re: 1964 oil pan drain plug sealing washer

Thanks, Joe. Wow I thought those current GM gaskets really didn't leak. Didn't the Fourtheenth Floor declare "NO LEAKS" back in the eighties?

My '88 MBZ uses a copper washer and the cast aluminum oil pan has a steel insert that the steel bolt fastens to. I doesn't seep, leak, whatever. Bone dry! My '91 MR2 uses what appears to be an aluminium gasket coated on both sides with a gasket material on the stamped steel pan and it too is bone dry.

Duke

I learned from another thread that the drain bolt threads into a plate that's spot welded to the inside of the pan. Unlike other designs, oil does not need to pass through the threads to reach the gasket. It has a direct channel between the bolt and the hole in the pan to the gasket. So the gasket surface is the only seal, and thread sealer does nothing.

[Jack J.]

Re: 1964 oil pan drain plug sealing washer

Can't remember what car/year I owned, that the "gasket" was a soft aluminum washer that sealed. j. j.

[Mike T.]

Re: 1964 oil pan drain plug sealing washer

I've been using those oil pan plug gaskets - #14090908 - for at least 20+ years and like them better than the white plastic ones but do still have a slight leak out of some of them.

[Duke W.]

Re: 1964 oil pan drain plug sealing washer

I learned from another thread that the drain bolt threads into a plate that's spot welded to the inside of the pan. Unlike other designs, oil does not need to pass through the threads to reach the gasket. It has a direct channel between the bolt and the hole in the pan to the gasket. So the gasket surface is the only seal, and thread sealer does nothing.

If the gasket seals to the pan and underside of the bolt head, there should be no leaks, and no thread sealer is necessary. That's the case with two of my other cars that I mentioned.

Duke

[Joe L.]

Re: 1964 oil pan drain plug sealing washer

Thanks, Joe. Wow I thought those current GM gaskets really didn't leak. Didn't the Fourtheenth Floor declare "NO LEAKS" back in the eighties?

My '88 MBZ uses a copper washer and the cast aluminum oil pan has a steel insert that the steel bolt fastens to. I doesn't seep, leak, whatever. Bone dry! My '91 MR2 uses what appears to be an aluminium gasket coated on both sides with a gasket material on the stamped steel pan and it too is bone dry.

Of course these gaskets are basically single use, but I can dress the MBZ copper washer on some 400 paper to cut down the galling and reuse them at least once. I've also reused a MR2 gasket, but I bought a big enough supply for both way back when that I probably have a lifetime supply. I just wanted to see if I could get away reusing them if I run out, so I save the old ones.

Is there an aftermarket equivalent of the GM gasket that I can buy at a local FLAPS like Pep Boys?

Duke

Duke------

I don't know of an aftermarket direct equivalent of the GM gasket. Mike T has posted a photo of the gasket so you might check the carded stock at a FLAPS. I have seen some aftermarket gaskets that are similar (i.e. metal/rubber) but not the same as the GM gasket. Actually, even from GM the gaskets are not very expensive.

GM later went to a different style drain plug and gasket. However, these plugs have metric thread. They have a circumferential "groove" on the flange of the plug into which fits a replaceable rubber gasket. This design has the effect of controlling the the amount of compression of the gasket. A great idea but these leak, too.

[Richard M.]

Re: 1964 oil pan drain plug sealing washer

Napa....

https://www.napaonline.com/es/p/SERD...put=ser+dpg830
NWMTMBLG.jpeg

I had a 427 drip driving me crazy, brand new GM service pan.

This type fixed it. Note I can't recall if this was the actual Napa pert # I used, but the rubberized internal ID ring is the key.

Rich

[Joe L.]

Re: 1964 oil pan drain plug sealing washer

Napa....

https://www.napaonline.com/es/p/SERD...put=ser+dpg830
[ATTACH=CONFIG]106765[/ATTACH]

I had a 427 drip driving me crazy, brand new GM service pan.

This type fixed it. Note I can't recall if this was the actual Napa pert # I used, but the rubberized internal ID ring is the key.

Rich

Rich------

Yes, I've seen these but never tried one. These are similar to the GM part but are not exactly the same.

[Gary B.]

https://www.napaonline.com/en/p/SERD...in+plug+gasket

BD7403BE-85A1-4929-AE94-1F11DD99440D.jpg

Gary

[Richard M.]

Re: 1964 oil pan drain plug sealing washer

Gary yes I believe that's it. I bought a bag of 10 then and they went into the glove box of that 67 L71.

Rich