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Joined: Nov 2013
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Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Nov 2013
Posts: 131 |
I have a 32 chevy pan I am trying to save. It had water condensation in it for years which caused some rust through spots. I had them brazed, but the pan kept warping, and hairline cracking causing three small leaks. I soldered them on the outside where it leaked, and it holds water now. But I would like to apply something to the inside to do more sealing.
Any guidance?
Thanks, Norm
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Joined: Apr 2006
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A couple of blobs of JB Weld on the inside will do the trick.
Cheers, Dean
Dean 'Rustoholic' Meltz old and ugly is beautiful!
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Joined: Dec 2001
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Technical Advisor ChatMaster - 10,000
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Gas tank sealer would be a great solution.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Nov 2002
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I would not dare to use that in the pan. At least if it's in the tank and fails then the car doesn't run. Don't want to think of the damage it could cause in the "lube" system.
Steve D
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Joined: Dec 2001
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Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
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Which is most likely to compromise the sealer, gas or oil? Gas tank sealer has many uses. When assembling a 4-cylinder engine for example I dip every bolt that fits in a through hole with the gas tank sealer. Basically, the sealer is a glue, so it can be used in many places as a glue.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Nov 2002
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ChatMaster - 7,000
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That's certainly interesting to know. my concern would be the heat in the oil pan as gas tanks don't get that hot. If it works for you that's great, but I don't like experimenting with something as valuable as an engine. I don't know which product you are using, but maybe the Mfg. could use the info. As for glue I know someone that assembled some wood parts on a 32 incorrectly and didn't realize it until the glue had set. He called the Mfg. and they advised to use a heat gun and he was able to get it apart. Usually when a product is advertised for a particular purpose it has been tested. I'd rather the Mfg. do the testing than me as my pockets are very shallow. If the sealer did come loose and plug off the oil supply causing total engine seizure do you think the "gas tank" sealer Mfg. will warranty the engine?
Steve D
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Joined: Nov 2001
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ChatMaster - 15,000
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ChatMaster - 15,000
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I agree with your analysis of the use of gas tank sealer. Most sealers are room temperature cured PVC. The heat stability of PVC is very poor, when the temperature reaches 140 °C (284 °F) PVC starts to decompose. Its melting temperature is 160 °C. It also softens not too far above the boiling point of water. That is why CPVC (chlorinated PVC) is used for hot water piping versus PVC for cold water lines. Sorry for the chemistry lesson but in this case I feel it is important.
How Sweet the roar of a Chevy four!
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Joined: Nov 2012
Posts: 604
Oil Can Mechanic
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Oil Can Mechanic
Joined: Nov 2012
Posts: 604 |
Surely there is a suitable, good, used oil pan out there somewhere.
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Joined: Nov 2013
Posts: 131
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Nov 2013
Posts: 131 |
Temp wise silicone would be great, but it won't stick. Polyurethane has a use temp up around 250 deg F, and sticks well. What about those truck bed spray on liners? It doesn't need to be thick, just flexible, sticks, withstands temp, not deteriorate by oil. And don't cover the whole inside. Just overlap the potential leak spot.
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Joined: Feb 2011
Posts: 3,136
ChatMaster - 3,000
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ChatMaster - 3,000
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I'd quit while your ahead...I've soldered gas tanks before and never had problems after that...
1947 Fleetmaster Sport Coupe VCCA # 47475
If it's not wearing a Bowtie...It's not properly dressed...!
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Joined: May 2002
Posts: 6,149 Likes: 42
ChatMaster - 6,000
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ChatMaster - 6,000
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In your situation I would throw the pan in the scrap metal bin and acquire another. I know the 32 pans are probably rare as rocking horse droppings but I would not trust any repair.
Tony
1938 1/2 ton Hope to drive it before I retire
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
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I have repaired several oil pans with rust penetration. First used brazing but recently all were welded. MIG wire machines do a great job on sheet metal as they don't heat as much and warp the metal. The key is to get all the pits welded. Recently we fixed a pan with 20+ holes. Took sand blasting and three different welding sessions to find and fix all the holes or almost holes. Pan is solid and dry as a bone on the outside. Cleaning and probing any suspect spot is key to finding all the holes or weak spots.
How Sweet the roar of a Chevy four!
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Joined: Feb 2002
Posts: 1,178
ChatMaster - 1,000
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ChatMaster - 1,000
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A friend had the same problem with his 216 pan. We were on a road trip when the problem became obvious. It was drained, seeping oil cleaned off and JB weld applied. This was 3 years ago and all is still okay.
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Joined: Dec 2001
Posts: 301
Backyard Mechanic
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Backyard Mechanic
Joined: Dec 2001
Posts: 301 |
"Never give up" Louis Chevrolet
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Joined: Nov 2002
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ChatMaster - 7,000
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That's a very nice appearing pan. I'll bet it goes for a lot more than where it's at right now. ($44.95)
Steve D
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Joined: Jul 2012
Posts: 145
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Jul 2012
Posts: 145 |
That's what it sold for and only one bid, so someone missed out on a great deal if they really needed one, and they are rare as previously stated.
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Joined: Nov 2002
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ChatMaster - 7,000
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ChatMaster - 7,000
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It should be delivered here tomorrow. Mine needed painting so this was easier.
Steve D
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Joined: Nov 2002
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ChatMaster - 7,000
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ChatMaster - 7,000
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Thanks to Chevrolet6 for the tip on the oil pan. It arrived yesterday and is every bit as nice as the photo posted in the link above. Not one ding and the paint is perfect! I really did wait until the last minute as I know the tip was for NKOPP, but with no bids posted it was just too good to pass up.
Steve D
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Joined: Nov 2012
Posts: 604
Oil Can Mechanic
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Oil Can Mechanic
Joined: Nov 2012
Posts: 604 |
Steve, Yu dun guud! 'Glad you got it!
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