JB Weld Success?
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Fleet Mechanic
Joined: Oct 2002
Posts: 1,385
Likes: 1
From: Mercer County, OH
JB Weld Success?
Has anyone here ever had any real success using JB Weld?
I'm thinking about giving it a try on some worn hydrostatic transmission parts in my Simplicity lawn mower. I'll be attempting to bond it to steel and aluminum parts that are in constant contact with oil.
I'm thinking about giving it a try on some worn hydrostatic transmission parts in my Simplicity lawn mower. I'll be attempting to bond it to steel and aluminum parts that are in constant contact with oil.
Junior User
Joined: May 2003
Posts: 76
Likes: 0
From: south jersey
I used it on a gas tank that had some rust holes it worked real good. I removed the tank cleaned up the rust spots good and let it cure for a couple days before filling with gas. That was a few years ago and its still holding up fine.
Hotshot
Joined: Jun 2003
Posts: 12,340
Likes: 4,361
From: SW VA
I used it on my 3wheeler forks. The front tire was a little too wide and it would wear away the forks at one spot to where a pin-hole opened up and the oil would leak out. I put some JB Weld on it and its held up ever since (well...until the tire wore through it again). But I just kept applying a little bit about twice a year.
Also, on the same 3wheeler, back when it was only a few months old (1987), my brother was riding it and he hit a large rock which put a hole through one of the engine side cases. He put some JB Weld on it and smoothed it out and put a little paint on it, and its been good-as-new for 18 years now!
Also, on the same 3wheeler, back when it was only a few months old (1987), my brother was riding it and he hit a large rock which put a hole through one of the engine side cases. He put some JB Weld on it and smoothed it out and put a little paint on it, and its been good-as-new for 18 years now!
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Senior User
Joined: Jan 2005
Posts: 314
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We just had the trans case crack on my sons saturn SL1. The mechanic who had worked on it recently, tried to put JB on it as a temp. fix. It held for less than 72 hours. It cracked along the original crack line. Don't think it holds up well under high stress/pressure conditions.
Seems to work in some cases but not all. I would be hesitant to think it will last for long on your mower.
Seems to work in some cases but not all. I would be hesitant to think it will last for long on your mower.
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Elder User
Joined: Apr 2004
Posts: 545
Likes: 1
From: Shreveport, La.
JB-Weld is incredible stuff, the original not the newer faster set that's available also.
The posts above that mention failure, it's most likely caused by not cleaning all oil away from area and allowing decent cure time. Somebody always has to poop in the Cheerios.
Have personal on hand experience with using JB on many repairs over the years, it holds up well to pressure and heat.
The posts above that mention failure, it's most likely caused by not cleaning all oil away from area and allowing decent cure time. Somebody always has to poop in the Cheerios.
Have personal on hand experience with using JB on many repairs over the years, it holds up well to pressure and heat.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
It won't hold up inside a hydrostatic transmission to repair worn parts. JB Weld is what is called a filled epoxy material, not very incredible at all. I have worked with that type of material for years. I have also had years of experience working with hydraulics systems... -Get some new parts before you ruin all the other parts and have to replace everything.
You probably need to take it to someone that knows hydraulic systems for a close examination and evaluation. Some badly worn parts may not be readily apparent to the untrained eye. The material worn off those parts has done a lot of damage to other parts in the system. A person really needs to know what they are doing when working with hydraulics. Failures can be dangerous.
You probably need to take it to someone that knows hydraulic systems for a close examination and evaluation. Some badly worn parts may not be readily apparent to the untrained eye. The material worn off those parts has done a lot of damage to other parts in the system. A person really needs to know what they are doing when working with hydraulics. Failures can be dangerous.
Last edited by Torque1st; May 15, 2005 at 12:44 AM.
Tuned
Joined: May 2005
Posts: 331
Likes: 0
amen to the failures above- it will not hold up to high heat, pressure, or friction. When i was a young buck, (and stupid), i got an old dirt bike for free. A chunk of the land on the piston ( the ridge between the two ring grooves) was missing. I carefully cleaned and prepped it and filled it with jb weld. after several attempts i finally had something i couldnt break out and had it smoother down to match the piston. I put it all back together and the bike actualy had compression! I even got it started and it ran for about 30 seconds before the jb weld actully burned up and flaked off down into the crank. Not only did i have to rebuild the top end the right way, i had to rebuild the bottom end the right way. Other than that its WAY good stuff- you can patch just about anything with it.
Elder User
Joined: Aug 2000
Posts: 763
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From: home
JB Weld in cracks
I found out that you can strenthen the JB Weld by using wire or paper clip as a backbone to the JB Weld mixture. Put the mixture down than a paper clip on top & than more mixture.It has worked on metal & plastic items under stress . Would not use it inside & engine on a stressed part as if it came loose it would mess up things. 
Laughing Gas
Joined: Aug 2004
Posts: 1,086
Likes: 2
From: Portsmouth, VA
Just used it to patch the gas tank on a car. It worked out great, I put a couple coates on over a period of days then filled it back up with gas. Have yet to have a problem with it.
- Chris
- Chris
Posting Guru
Joined: Jan 2003
Posts: 1,162
Likes: 1
From: House Springs, MO
As for the crack repair, it might have held a little better if you had taken a drill bit (VERY small, mind you ) and drilled a little hole at each end of the crack, thereby keeping the crack contained between the two small holes, then go ahead and re-do the patch. That's how truck frame crack repairs are done.