8-101 Water in Oil

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06 Jun 2016 06:46 #31228 by Brad Hoskins
Brad Hoskins replied the topic: Re: 8-101 Water in Oil
Curtis

I have identical leaks in my 1931 8-98, after the previous owner did a rebuild no less!
Not quite a sure what I'm going to do.
Been thinking about the fix for 2 years!!! Could find another block but then it wouldn't have all those matching numbers.
When you figure it out, let me know! It was thinking of using engine concrete as per the Ruxton post attached.

http://www.thelincolnforum.net/phpbb3/v ... 38&t=44158

Either way, I think the engine has to come out and come apart. Thinking of sleeving all cyls while I'm at it!

Brad

31 8-98 cabriolet

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06 Jun 2016 11:00 #31231 by ilikescars
ilikescars replied the topic: Re: 8-101 Water in Oil
I had a similar leak in a '34 engine. It is now being welded by a pro. then rebuilt. Epoxy may work, but may disappoint in the long run.

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06 Jun 2016 13:08 #31233 by curtiss
curtiss replied the topic: Re: 8-101 Water in Oil
I read a lot of posts on the model T and other forums where they had a similar issue and used JB weld with no issue as long as the surface is very clean.

Since the 3 holes were very tiny and this is not a pressurized system over the weekend I decided to try the JB Weld High Heat putty since it was much easier to work with in a tight space. I cleaned the surface with brake cleaner several times and I took my A/C vacuum and had a vacuum on the water system while I applied the putty. I will let it cure until tomorrow then I will put the system under pressure and test it out with a radiator pressure tester. Once that is good I will fill it up with water then pressure test again.

I applied the JB to a larger area in case there are other thin spots. If this does not work the next attempt will be the JB Weld Classic 2 tube stuff.

The Putty seems pretty tough and sticky when it dries, I also put some on an old cast caliper to see what it takes to knock it off.

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13 Jun 2016 15:57 #31258 by curtiss
curtiss replied the topic: Re: 8-101 Water in Oil
UPDATE:

OK the JB Weld High Heat Putty did not stick well and one of the spots leaked under pressure.

I bought a bunch of Dremel tool attachments and I will clean off the putty and try the JB Weld classic for my next attempt.

More updates to follow.

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19 Jun 2016 02:43 #31280 by mikespeed35
mikespeed35 replied the topic: Re: 8-101 Water in Oil
You must remember that when the engine is running the engine will be hot and the water also. Expansion and contraction will play a part. Unless the block and JB Weld have the same expansion rate it probably won't stop the leak. I hope you prove me wrong.
CORDially Mike

Mike Huffman

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15 Aug 2016 12:48 #31534 by curtiss
curtiss replied the topic: Re: 8-101 Water in Oil
UPDATE:
I ground down the area that was leaking and cleaned it very well to make sure all of the oil was gone. I mixed up some traditional JB Weld and applied it to the small crack. Remember, I only got a few drops of leaking once in a while so the actual leak was less than a pin hole. I put it all back together and filled it with water and no leaks for a week.

I then drained the water out and refilled with the bars leak tablets and water. I ran it for 20 mins, the car ran up to 159 degrees and so far no leaks. I plan to do some more testing this week o see if it holds. Even if the JB weld does not hold hopefully the Bars Leak will pick up. At leaat it is alive and running again :)

I tried the Bars Leak tablets becasue some friends who used to work on the GM line said they dropped a few tablets in many of the cast iron blocks that came off the line as a preventative. Also a local production engine re-builder does the same today. Actually Bars Leak makes the tablets GM re brands.

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