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Tool Talk Discussion Forum

JB Weld an oil pan?

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markiz41

10-23-2007 14:49:16

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Wife had a "little" mishap with the car - the oil pan is cracked. Not a gusher, more of a hairline. I tried to JB from the outside after draining and a good cleaning but the 50/50 mix is too thin and most of it just drips out in the first few minutes exposing the crack. I was wondering if I could put more hardener in than resin and make a thicker paste that'll stay put? Use a different product? Or just bite the bullet and put in a new pan? Appreciate any advice.

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rich4

10-27-2007 14:44:08

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

I once repaired a metal pan, not alluminum on a weekend race car once with steel epoxy, it lasted for years. I kept an eye on it but allways OK. Small hole barely a drip from a rivet used to attach a windage tray in the pan. The right way would have been removing the pan and welding it. I would be leary about welding a pan while still on the car. There is still lots of fumes still in the crackcase. Caution, my brother once welded a small hole on a sealed empty 50gal barrel,supposed to have only been used for water, but may have been an oil barrel, it expanded and blew the ends off. Luckily he only had minor injuries.

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JML755

10-25-2007 13:00:32

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

Love reading all the suggestions, (learn something new every day) that people have posted.
Since it is difficult to remove the pan, it's aluminum, oily, dirty, etc.I'll throw this out there: If it's a small flat area, how about putting gasket material over it and drilling/tapping holes around the periphery and putting a plate on top to secure the gasket?

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soundguy

10-25-2007 12:12:08

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

I'd solder it or braze it.. however.. if i had to glue it.. i'd use one of those epoxy putty specialty sticks. They make one for batteries that is acid resistant, and ony that will stick to gas or oil wet metal.. clean t with carb cleaner and then use that one.. let set.... if it is a crack.. drill both ends to keep it from running..

soundguy

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Tradititonal Farmer

10-24-2007 03:53:37

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

I repaired an oil pan using the quick setting JB weld.I drained all the oil let it drain for an hour or so and then sprayed throughly with ether to clean it inside and out may have to do it several times then apply the JB weld with a screw driver or stick never use your fingers as the oil off your skin will cause it not to stick

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Thanks, guys

10-23-2007 23:40:03

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

Some great ideas. The pan is alum. or some sort of alum. alloy, ribbed criss cross style on the bottom. Can't weld it myself, taking it off would be a major project cos the exhaust has to be off. I just eyeballed the patch and some of it stuck on pretty well but there's still a pinhole.. I'll see what I can do with it using your suggestions.

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T_Bone

10-23-2007 19:16:09

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

Hi Mark,

The only way your going to make this repair is to drain the oil, tilt the pan so residual oil drains to one side or front/back, heat the area to 500� to burn off the oil inside the crack then repair.

I like welding as it's permanate. Even gas welding/solder will work well here as that burns off the oil first. If you haven't welded thin metal practice on some scrap first. It's easy.

I wouldn't drop the pan if it was mine. Just more uneeded work but the area does have to be clean no matter what.

T_Bone

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TimV

10-23-2007 18:09:43

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

If you have trouble with JB Weld dripping off, allow it to cure somewhat before applying. Half an hour or so will get it to the point it can be molded and will stay in place. Heating it slightly (a trouble light placed close to it works fine) will also help. As has been mentioned, if you go this route, the area HAS to be clean and dry for good adhesion and maximum strength. This goes for the application method as well--smoothing it out or pressing it with dirty, greasy fingers will severely compromise the bond.

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RayP(MI)

10-23-2007 17:56:17

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

Think failure mode..... What"s going to happen if your repair fails while you"re going down the road at highway speeds and dumps all your oil on the pavement. Better come up with a pretty sure fire permanent repair!

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MarkB_MI

10-23-2007 17:51:00

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

If I could get the pan off, I would repair it by brazing or welding. Even if I couldn't remove it, I'd take a chance brazing it on the vehicle rather than use epoxy.

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john *.?-!.* cub owner

10-23-2007 17:26:46

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Re: JB Weld an oil pan? in reply to Rich Va, 10-23-2007 14:49:16

once you spread the JB Weld on, put a layer or two of masking or duct tape over it to hold till it cures.

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JerryU

10-23-2007 17:08:38

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

There is a goo out there called Seal All. Not sure about oil, but I have sealed a gas tank with it.

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Patrick Martin

10-23-2007 17:02:44

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

You need to ensure that the surrounding area is clean first. Let me ask you this.....is the pan off of the vehicle? If you are doing this repair with the pan on the vehicle then you need to clean it with paint thinner and then lay a piece of tape over the crack to keep any oil from seeping into the JB weld and contaminating it. after isolating it with the tape, wipe it down with thinner and roughen up the surrounding area. mix your JB weld and apply over the tape and rough areas. This will hold.

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jd b puller

10-23-2007 15:43:59

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

JBWeld is funny, it's tough stuff, but you HAVE to clean the surface good. Clean the surface with ACETONE, not Carb Cleaner or other. If it's runny, it's either too warm, or not enough hardener in it.

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JMS/.MN

10-23-2007 15:21:53

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

Weld it with a wire feed.

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RobMD

10-23-2007 17:21:48

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Re: JB Weld an oil pan? in reply to JMS/.MN, 10-23-2007 15:21:53

best answer i've seen so far.

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JMS/.MN

10-23-2007 21:20:47

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Re: JB Weld an oil pan? in reply to RobMD, 10-23-2007 17:21:48

Thank you. My first conscious thought after posting that was..... ...Yeah, JB weld is fine for many uses, but..... think about it- if it fails, the oil drains out, and the engine is ruined! No need to buy a new pan- just weld the old one. With a wire feed, and some talent- don't need to pull the pan. Years ago, when all I had was the stick welder- I could not weld thin material. But a wire feed, had it since '88- I can weld holes in fish net if I can figure where to put the ground clamp!

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K.W. in Tx

10-23-2007 15:04:42

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

If I was in your situation I would try to rough up the surface around the crack with sandpaper, or lightly with a grinder if you can get get a grinder in the area of the crack. Of course after you drain the pan. Maybe in a clean container so you can reuse it after the goop cures. Clean around the crack with acetone on a rag to get oil off. I never had a problem with JB runnin off tho. If all else fails there is some stuff called Quick Steel at Walmart or Autozone that might work better. I have used it on old radiators before.

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Big Hunter

10-23-2007 15:03:49

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Re: JB Weld an oil pan? in reply to markiz41, 10-23-2007 14:49:16

put the new pan on

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jkemp

10-23-2007 18:35:50

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Re: JB Weld an oil pan? in reply to Big Hunter, 10-23-2007 15:03:49

Unless its a cheap old clunker beater PUT THE NEW PAN ON OR wIRE WELD , SOME THINGS JUST AINT WORTH RISKING .. LAST THING ANYONE NEEDS IS THE love OF tHEIR LIFE , RUINING A GOOD MOTOR ,BECAUSE THE EPOXY FAILED AND THEY WERE PAYING MORE ATTENTION TO CUZIN BETSY ,KIDS , RADIO OR THE GUY IN THE VETTE ,rather than the oil lite ,,best of luck to ya

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Jon Hagen

10-23-2007 16:42:18

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Re: JB Weld an oil pan? in reply to Big Hunter, 10-23-2007 15:03:49

The epoxy putty will not run off like regular JB and works quite well, BUT,is the spot exposed to more mishaps ?

JB weld or any of the epoxy repairs are strong, but very brittle. If struck hard ,the repair will pop off. In this situation, you may be better off welding or replacing the pan if there is any chance of another mishap in the same spot.

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Dumb Dumb

10-24-2007 06:34:41

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Re: JB Weld an oil pan? in reply to Jon Hagen, 10-23-2007 16:42:18

Probably to late but here is what I see. Replace pan with used pan or have it professionally welded. Brazing won't work wrong metal, brazing uses a copper alloy rod, I heard aluminum like pan. Wire welder, not without the correct shielding gas and aluminum wire, won't work. Solder, not on aluminum, lead and tin or the lead free pure tin will not stick to aluminum. There is a aluminum solder I saw demonstrated at a tractor show, I have no personal experience with it so I won't endorse it. The correct welding process would be TIG tunsten inert gas welding. Not knocking the other posts but from what I read these are the cold hard facts. Good luck hope it all works out. DD

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JOB

10-25-2007 18:51:54

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Re: JB Weld an oil pan? in reply to Dumb Dumb, 10-24-2007 06:34:41

Dumb Dumb you are not so dumb. I had a friend whose wife hit a piece of steel in the road. Put a small hole in the aluminum oil pan. A new pan was quite expensive, and would take a couple of days to get here. I welded the pan off the vehicle with a tig machine. He was driving the car in a couple of hours. I have brazed steel oil pans more than once with no problems. Take the pan off and do it right, good luck.

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