can you use jb weld to repair a hole in a piston?

Answer 1

Unfortunately, no. JB Weld is rated to a temperature of 500 °F. Temperature inside a cyclinder will generally reach in the neighborhood of 1000 °F.

Answer 2

If it is on the top (combustion area), - it will not last, because "JB" is burnable, and the heat will get it in a hurry! If the piston is good otherwise, take it to a welding shop and have them heliarc it with aluminum. Remove the rings very carefully, and lay them out so that you can get them back on just the way they came off........ After you get the piston back home, "dress it off carefully with a file, and make sure no "slag" remains in the "ring lands", - then you can put on the rings and re-assemble. Don't try to smooth the weld down unless you have a really good welding job, - which has it well "flowed in" around the bottom of the damaged area, - if you clean it off really smooth,you may make it so thin, - that it will burn out next to the "old hole"! Be sure though that you have enough off so that it doesn't hit on the head, or valves when engine turns over! This works fine for a mororcycle or small engine, but if it is a car engine, save yourself a lot of trouble, -- just buy a new piston (unless it is a rare engine that no parts are available for!) The repaired piston will weigh more than the others, and will throw the engine out of balance! This produces "harmonics" that can damage engine or in some cases - if ran at a certian rpm steadily, it may disassemble itself!

Answer 3

Definately NO.

JB weld is more for like home appliance repair (refridge, oven, A/C registers, etc. Trust me, I used to work at a hardware store and my manager suggested JB weld to fix a hole in this guy's intake manifold for his vintage roadster, (yes my manager wasn't the brightest crayon in the box to say the least). Turns out the guy's manifold completley warped somehow and left him stranded out the middle of nowhere for hours on end. Cost him over 800 bucks for a new custom manifold. You're better off not taking the risk.

Answer 4

JB Weld will do a stable job, yet you will ought to scratch the floor of the oil pan real nicely. Then get a peice of metallic which will disguise the crack thoroughly and have extra suitable everywhere in the perimeters of the crack. Sratch the metallic patch real nicely on the side that is going against the oil pan. Make real beneficial the oil pan is thoroughly clean of ANY oil what soever. positioned the JB Weld on the patch so it covers the finished patch use adequate so the JB will squish out around the perimeters and place the patch over the crack. you will ought to hold the patch against the oil pan tightly until it instruments, wedge it in case you are able to. enable the JB Weld to treatment for twenty-four hrs and top off the oil. this could make an enduring restoration if executed precise. I fastened an aluminum oil pan on a Honda Magna motorcycle like this and it on no account failed. I rode it for years afterwards. keep in mind wedge the patch and enable it set for twenty-four hrs. stable success!

Answer 5

HECK NO!

I won't even hold the temp of a gas BBQ grill!

And why would you tear down a motor and put it back together w/o spending the $40 for a new piston??? The gasket kit costs a lot more than that!!!

Answer 6

If you are talking about a piston in an internal combustion engine, no, I wouldn't recommend it. The temperatures and pressures ar too high for JBweld.

Answer 7

Husband (mechanic for 25 years) said No, it won't hold the heat or the pressure.

Answer 8

No
Like donnabellekc's hubby said, it won't hold the heat or pressure. And it's very brittle where it attaches to other compounds (aluminum, steel, magnesium).

Answer 9

I suggest trying to whittle a wooden peg to fit the hole and sanding it smooth.

Answer 10

sure it will!! dont listen those other guys, it will hold fine as long as you dont want to put it back into the engine or ever use it again for it's intended purpose.