MPH Posted October 26, 2003 Posted October 26, 2003 Has anyone used JB weld to fix a hole in a carb bowl yet??If so, how's it hold up? Thinking my leak last night was torn, used gasket or maybe float to high of setting I redid carb again today, gas poured out. Soo I paid attention to where it was coming from this time instead of assuming problem and found about 1/16 in hole in the carb bowl, cleaned it up good and gave it a good coatting of JB. I've used it on a lot of things but don't recall using it in contact with gasoline before..thanks for any life experiences shared..MPH
UCD Posted October 26, 2003 Posted October 26, 2003 Marty I have had gas work its way under JB-weld and have it lift off. Napa sells an epoxy resin gas tank repair kit. It sells for between $8.00 and $15.00 depending on where you buy them. they are a two part kit with epoxy resin on one side of a clear bag and hardener on the other side separated by a plastic bar that pinches the bag at the fold. slide the plastic divider of and mix the two parts. It will turn a dark gray and get very warm. this can be poured or brushed on and dries to a very hard shiny surface. The kit comes with a bar of bees wax to seal a running leak so carb or tank could be repaired with gas in it and with out removal. You have between 5 and 10 min working time. There is more than enough to repair a carb so you might want to have something else handy that needs to be repaired at the same time.
JimC_Vt Posted October 26, 2003 Posted October 26, 2003 MPH, I would think it will hold up .....I've used it a lot in the past w/o any issues ...vibration would be it's worst enemy ! I have used silicone on fuel tanks that are still holding up well ,it's quicker drying then JB and vibration is not an issue ... Good Luck, jim
DaleC Posted October 26, 2003 Posted October 26, 2003 I had an cast aluminum oil pan break. I had it weilded and then had to use an epoxy stick on it to seal some pin holes. I got the black epoxy stick from Napa. You rub it on like buttering an ear of corn. It as been two years and the wield has never leaked since. I would think that JB wield would hold well. I have seen it used to repair intakes on old continienal sixes with do failures. Just my opinion.
Salthart Posted October 26, 2003 Posted October 26, 2003 JB , when used right is about as good as it gets. Clean is the #1 issue. Clean with carb cleaner and then with scalding water and soap and then fresh water. Rough the area with CLEAN 180 or 240 sandpaper. THen apply the JB weld kinda thick if your able and press a "Cover" into it.. Like a penny or a welsh plug etc. Its my thinking that this spreads out the load but for whatever reason, the repairs I have done like this have yet to ever fail.. A friend that is no longer with us started his truck to go zero his rifle for season. He had gout so bad that he seldom hunted out of site of his truck. Well he started the truck to let it warm up and walked back for his gear. Walking back he saw a streem of oil coming from the engine. This was a nissan truck with the oil pump in the timing cover, And where the cover met the block is where the gasket failed. There was no time for repairs before season. We cleaned it as told above, mixed the JB and applied it thick (1/8th inch or more ) After season, when we did the repairs, it had not leaked a drop.. And thats holding 40 psi oil... JB weld, while it don't take the place of new parts is one of the finest tools I can think of. You can use it so many ways.
BrownA Posted October 26, 2003 Posted October 26, 2003 :)http://www.simpletractors.com/club2/topic.asp?ARCHIVE=true&TOPIC_ID=8264&SearchTerms=JB,Weld
goatfarmer Posted October 26, 2003 Posted October 26, 2003 Personally,I've not had much luck with JB.Tried fixing a pot metal trolling motor mount,and tried fixing a cast piece on a chainsaw. Neither repair worked,even after making sure the area was cleaned and prepped properly.
PatRarick Posted October 26, 2003 Posted October 26, 2003 I purchased a new Vanguard twin that was set up for LP. The LP setup was added to the gasoline carb by drilling a hole through the carb and installing an LP jet. I removed the jet and drilled the holes out for expansion plugs. Once the plugs were installed, I finished the outside of the carb, the inside of the carb bowl, and inside the carb throat with JB weld. A new carb showed up on e-Bay about the time I did this, and I got it cheap, just in case the repair didn't hold. It's been sitting on my shelf for three years, waiting for the JB to fail. Pat
MPH Posted October 26, 2003 Author Posted October 26, 2003 Thanks for replies guys.. Salthart, you clean a little better then I did, I sanded it clean, blew it off, then washed with brake cleaner. I then applied a good thick layer. Alan, your fix is the same problem I got. Didn't want to take the carb apart again cus I'm 205 miles from a new gasket and the permatex got applied pretty heavy last time goig together. Whole carb needs a kit. When I kit it, I'll follow your method. Pat, how do you know it hasn't failed yet if its still on the shelf?? The radiator in my pick-up has been JB'ed for about 5 or 6 years now, fixed it at 45 below zero, left it run for about an hour to cure, with the cap lose. Not all my fixes with it have worked, but I always have some around..Hopefully I'll test this in the morning..MPH
HubbardRA Posted October 26, 2003 Posted October 26, 2003 I have used JB Weld to plug vacuum lines on race car carbs. I also sealed a leak in an aluminum radiator with it. I have never tried it when it was submerged in gasoline. I would make sure there is plento on both sides of the metal so that it is locked in place and vibration cannot make it lift off.
BigSix Posted October 27, 2003 Posted October 27, 2003 Marty: I believe I've had JB Weld survive in a repair exposed to gasoline--just can't remember-lol. I did fix the oil pan on my old Chevy van, which had rusted through, and that was probably 15 years ago. I still have it (up on the Island) and it's still holding.... Have you considered patching the hole with a small machine bolt and nut? If you have clearance inside the bowl, for the bolt head (say, after you shave the head with a Dremel, a little?) perhaps bolting it with a 1/16" bolt would do. You could always cut a mini gasket out of a scrap of gasket material. However, if you're bolting on a curved portion this could crack it. Just an idea.... Peter
MPH Posted October 27, 2003 Author Posted October 27, 2003 Just to report, the JB Weld held fine this morning. Had it running for about 30- 45 min. Feel secure I scored good, sure is good sounding 16hp. Most likely wind up in my B-112, which is really a tired B-114, that I need to take apart to put in hydro lift I got last spring from SLI,fix the steering, and replace the linkage to the varaible drive with the one Kirk send me that has round holes and a round shaft. By the way Kirk, I finally got to opening that sunday, looks good, used a stamp this morning..MPH
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