Let's do a little homework first and be a little cautious -- I would be. Can't always trust what people "say", especially when they don't back it up with pictures and an after-action report.
http://www.jbweld.net/faq.php is the JBWeld frequently asked questions.
Me, I'd read them all. And having read them I'd use J-B Weld instead of J-B Quik since it is harder and twice as strong and I'd use acetone or lacquer thinner to clean the journals before application.
And I'd stop by the auto parts store and buy some plasti-gage to clearance check the journals (all of them) after building up the bad journal and sanding it down to get to the correct oil clearance figure.
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Q: How much heat can J-B Weld withstand?
A: J-B Weld (Part # 8265-S, 8265, and 8280) can withstand a constant temperature of 500 degrees F. The maximum temperature threshold is approximately 600 degrees F for a short term (10 minutes).
Q: Will J-B Weld work on an automotive exhaust?
A: Because of the extreme temperatures of exhaust systems, we do not recommend J-B Weld for use on exhaust manifolds and catalytic converters. Nor do we recommend the product for repairs within the combustion chamber.
Q: How can I remove J-B Weld after it is fully cured?
A: When fully cured, J-B Weld can only be removed by grinding or filing it off, or by directly heating the product above the 600 degree maximum temperature threshold.
Q: Is J-B Weld available in large sizes (quarts or gallons)?
A: No. The largest available size for the original J-B Weld is our Industro Weld product (part # 8280). Industro Weld consists of 5 ounces of resin and 5 ounces of hardener for a total of 10 oz. of usable product.
Q: Is J-B Weld toxic?
A: No. J-B Weld is non-toxic. However, we do not recommend consuming the product.
Q: What can I use as a surface cleaner before using J-B Weld?
A: We recommend using acetone or lacquer thinner. In the absence of these two, soap and water can be used. Just be sure that the surface is completely dry before applying J-B Weld. DO NOT use alcohol, or any other �cleaner� that will leave a petroleum residue.
Q: Is J-B Weld resistant to water and/or gasoline?
A: When fully cured, J-B Weld is completely resistant to water, gasoline, and about every other petroleum product or automotive chemical. For wet-surface or submerged water or gasoline repairs, see our J-B Stik or Waterweld product information.
Q: Will J-B Weld hold up to extremely cold temperatures?
A: J-B Weld has proven to maintain its characteristics to temperatures as low as -67 degrees F.
Q: Will J-B Weld conduct electricity?
A: No. J-B Weld is not considered to be a conductor. It is an insulator.
Q: What is the tensile strength of J-B Weld and J-B Kwik?
A: J-B Weld has a tensile strength of 3,960 psi. J-B Kwik has a tensile strength of 2,424 psi. For more physical properties information, please see the "PRODUCTS" section of this website. (note: Babbitt alloy tin has tensile strength of 10,000 psi so this epoxy stuff is weaker than normal bearing materials. Cast aluminum is good for 30,000 psi)
Q: What is the difference between J-B Weld and J-B Kwik?
A: The simple answer is that J-B Kwik is about half as strong as J-B Weld in both strength and heat resistance. The other differences are somewhat obvious by the name. J-B Kwik sets in 4 minutes and cures in 4-6 hours, whereas J-B Weld sets in 4-6 hours and cures in 15-24 hours.
Q: Is there anything that J-B Weld WON'T bond to?
A: J-B Weld will not adhere to, or bond well to:
* Any flexible rubber surface
* Leather
* Vinyl
* Canvass
* Polypropylene plastic
* Polyethylene plastic
Q: What color is J-B Weld when it cures? Is it clear?
A: J-B Weld cures to a very dark gray (steel-like) color. We're still working on a clear version that's just as strong as the original.
Q: Do you make a J-B Weld specific for aluminum or stainless steel?
A: J-B Weld works great on ANY metal surface (lead is an exception). Use as directed on package and J-B Weld will get the job done.
Q: Can I thin J-B Weld to make it pour easier?
A: Yes. Add up to 1 tsp. of acetone or lacquer thinner per 2 oz. (1 full package) of mixed product.
Q: Is J-B Weld microwave safe?
A: Yes.