I changed oil yesterday in my 65.I noticed the plug was not original, it was a self tapping typewith a fiber washer that was very brittle. I should have gotten a new washer for it then but did not. This morning I noticed a small puddle of oil under it. It was directly under the drain plug.I tightened the plug a little more hoping to stop the leak. It slowed a little but still leaks. What type of washer should I get to stop this? It is the only leak I have. Tom
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Re: Drain plug leak
Well I'll put money on that it will not stop leaking no matter what you do since the leak is most likely coming from around the self-tapping plug threads. I doubt a nylon washer will stop the leak. I have this same situation on my '64 and nothing I have done has cured the leak.
I had to buy a oil drain plug rapair kit from GM and must make this repair befotre the car goes back through flight judging.
Best Regards,
James West -
Re: Drain plug leak
James
Thanks for the input. Not really what I wanted to hear but I do want to get this leak stopped. All the cars and trucks I have had in my life time I have never had this problem.It is a new one on me. TomComment
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Re: Drain plug leak
Tom, chances are that fiber washer has been used one too many times, Try a new one. BillComment
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Re: Drain plug leak
I had the same problem on my 1965 small block engine. It is all original with 61,000 miles. I`m the first owner so I know that Bubba never performed an oil change thus the plug was not overtightened nor cross threaded.
I ended up installing a two piece self tapping plug with a built in drain plug. No leaks but it takes a few minutes to drain the crankcase.Comment
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Re: Drain plug leak
Bill
I am going to try a new washer. I am going over to NAPA Monday anyway so I hope they have them. My garage floor has been taking a beating since I bought this one. If I get this leak cured I will be good for awhile I hope. I am really surprised I don't have more leaks, this car sat in a mans garage for 7 years. 65 k original miles. Thanks TomComment
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Re: Drain plug leak
Tom, use a thread sealant, such as Loctite Pipe Sealant w/Tefelon (PST). It will take care of a lot of leaks. I use it everytime I change oil. Just another insurance against leaks.Dick WhittingtonComment
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Re: Drain plug leak
I thought I would mention I went to NAPA to get a few things and I asked the parts guy for a waher for my drain plug. He comes out with a metal washer with a rubber center inset. I put that on with some thread sealant and SHAZAM!!! No more leaky. Thanks to all. And anyone with a leak might want to try this if your threads are good. TomComment
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Re: Drain plug leak
Tom------
You mean like this? This is a GM #14090908 which was the drain plug gasket used for 1988-96 Corvettes and also the SERVICE gasket for all 53-87 Corvettes since about 1988. It works pretty well. It will stop your drips onto the ground. However, it will likely not completely stop the "oil film" seepage surrounding the drain plug.
The only thing that will completely stop all seepage that I have found is the torque-limited plug with elastomer seal used on later GM applications. Unfortunately, this is METRIC and is not easily retrofitable to your application.In Appreciation of John HinckleyComment
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Re: Drain plug leak
Just like that Joe! Ihave had it in a few days and no leaks. Thanks for all the help. TomComment
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