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JB Weld

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stan

12-21-2003 00:36:57

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If I use Jb weld on the oil side of an engine will the hot oil effect it?

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o4terry

12-22-2003 07:10:42

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

I had a tractor block that had a crack in the side that allowed a small amount of oil to leak through. I took it to a certified welder and asked him if he could weld it. I will never forget his reply----"I just hate to tell people
this, clean it with carburator cleaner, V it out
with a grinder, cover it with JB weld." He said
that welding it caused the heat to bring out the
oil that was impregnated in the metal, which
affected the quality of the weld. It worked!

JB weld has fixed more things for me then I can remember. If you want it to set up in a hurry, use a blow dryer/heat on it, otherwise you can work with it for over 20 minutes.

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kyhayman

12-21-2003 08:32:28

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

Back when I was a starving under grad I bought a rebuilt wreck from one of my professors. It was an '85 Olds Calais with a V6. When it was wrecked the motor mount against the firewall (front wheel drive, sideways V6) had ripped out of the block and leaked oil. No way to get to it without pulling th eengine or transmission. Local garage would take the motor mount out, clean area with starting fluid, and fill up with JB weld. Just as it set up he would bolt it back in. I would hold until it got up over a hundred or down in the teens. Then He'd clean it off and cover it again. Not a perfect fix but it only cost a few dollars and kept me going until I could get a job and another vehicle. He did it twice a year for the 3 years I had the car.

With that said, on the side of a tractor engine I'd either weld it or get it welded if you possibly can. As long as its easy to get to you can do a good job with either nickel/manganese or stainless steel. Rods aren't cheap (I just bought some 'no pre heat req'd NI rods and they were $2 each)

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stan

12-21-2003 08:40:51

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Re: Re: JB Weld in reply to kyhayman, 12-21-2003 08:32:28

I did patch the hole in the pan by using a special no preheat rod certalloy 880 about 4.00 a stick. but the area has several pin holes that I was afraid would leak. So I thought a layer of JB weld seal it.

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Bob M

12-21-2003 07:07:16

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

I used JB Weld to patch a hole in the oil pump pickup float on my Super H about 5 years ago. Several few weeks ago I dropped the pan to see how the repair was doing - the JB Weld is holding fine.

As others suggest the trick is to get the bond area absolutely clean. On the float I sandblasted to bare metal, then degreased the area with trichlorethylene...

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Chris Brown

12-21-2003 06:17:02

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

Carb and choke cleaner and a propane torch to clean the area. It'll hold. Uh, don't use the cleaner and the torch at the same time.

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greenbeanman

12-21-2003 11:04:29

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Re: Re: JB Weld in reply to Chris Brown, 12-21-2003 06:17:02

"don't use the cleaner and the torch at the same time."

Oh come on Chris, where is your sense of adventure?

That reminds me of the mechanic in my hometown that used to check leaks on LPG tractors with a match. One day I saw him use soap instead and inquired, "No more matches?" He replied with a grin, "Nope, I finally found a leak---a big leak."

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spud

12-21-2003 04:29:33

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

JB Weld is a good product that in years past I
have used many times for applications such as
you are talking about, but in the last few years
I have found a similar product called PC7 that
is much better and much easier to handle. PC7
is a two part compound that is mixed equal parts
of each, and is a paste form, not a liquid. It can
be applied upside down if neccessary. It sets up
like steel and heat, gas, oil or cold doesn't
bother it. Can be purchased at most auto parts
stores or hardware stores, give it a try.

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TO35

12-21-2003 03:34:16

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

You should have no Problems with it provided its clean when you apply it and cured before you use it....I use it alot shaping the ports of intake and exhaust of methonanol kart racing engines and even patching holes in blocks....I wash off the area where I am going to use it with a non residue brake clean like one from wurth...but there are many that work ok...doesnt hurt to rough up that area with a dremel tool either....

best wishes
TO

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Bob D. (La)

12-21-2003 03:27:28

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

Yes, it will work. As was stated earlier, the trick is getting it clean. I once repaired a Ford Pinto engine with JB weld, It was used for three years and never developed a leak. Again, I repaired a cracked rearend housing on a 9N. Six years later when I sold it, it still didn't leak. HTH

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hay

12-21-2003 03:16:09

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

won't hold for long. been there, done that. had a engine with a small hole in the block(no pressure in the area) and tried a patch repair with JB weld and in just a few days it came off. the problem is getting the area clean enough for the JB to adhere properly.

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andy

12-21-2003 02:48:31

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Re: JB Weld in reply to stan, 12-21-2003 00:36:57

course snot

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Jerry

12-21-2003 04:44:16

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Re: Re: JB Weld in reply to andy, 12-21-2003 02:48:31

I prefer the PC-7. I would clean good , Mask off and blast with sand or glass then apply PC-7. It takes at least a day for the PC-7 to harden completly. I like the PC-7 because you can work with it a lot longer than JB Weld. JB is impossable to work with in about 15 minutes. When blasting use a small blaster. (Hand held cannister like the radiator shops use.)

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AZ Jack

12-21-2003 18:25:27

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Re: Re: Re: JB Weld in reply to Jerry, 12-21-2003 04:44:16

Jerry-you must be using the quick set kind of JB. I have far better luck with the regular-stronger, adheres better and work time is quite long (several hours). I have used it on castings, gas tanks and even on an oil bath air cleaner bottom with no leaks. Will have to check out the PC7. Had not heard of that one. Jack

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MT POCKETS

12-21-2003 08:31:44

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Re: Re: Re: JB Weld in reply to Jerry, 12-21-2003 04:44:16

Everyone probably knows this already, but if you do not,you can smooth JB with a wet finger after you apply it .Just stick your finger in your mouth and load it up with saliva or spit, whichever you prefer, and start smoothing and shaping the JB to your liking. Keep your finger wet. Always spit your snuff out first. MT POCKETS

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