Oil pan and gas tank leaks

Zachary Hoyt · Jun 19, 2012

The 300 I am working on has a hole in the oil pan and a hole in the gas tank, both in the bottom where I assume water collected. Neither hole is bigger than 1/8" or so. Is there a reasonably permanent way to repair these or should I replace them? I was thinking about soldering the pan, but not sure if that would be suitable or not, and I have no idea about the tank. For now I will be using a 1 gallon plastic tank to get the engine running. Any advice will be much appreciated. By the way, I tested the starter and it did turn the engine over, thank you for all of the advice.
Zach

mkirsch · Jun 19, 2012

I just fixed an oil pan with silver solder. Don't know how it will work yet but it seems solid enough.

Dean Olson · Jun 19, 2012

I brazed several pinhole leaks in an H oil pan, from the inside. Worked fine and was about a 15 minute job. I let it cool and filled it with water to check for leaks.

Pan was not leaking till I cleaned about 2" of sludge out of it, cleaned it up and painted. I found the leaks after reinstallation and had a slow oil drip. I now water test, the few I have cleaned out since, before I paint. I minor lesson from the school of HK

I've brazed multiple oil bath air cleaner cups from the inside and had great luck with those.

I'm real spooky about gas leaks and would try to find a replacement rather than repair. I'd be worrying all the time about it failing in another spot and starting a fire.

If you brazed it from the outside and epoxy lined it might make sense if you just can't find a good replacement.

Oldiron29 · Jun 20, 2012

Zach, For the gas tank, I buy a gas tank sealer kit from Eastwoods.com Have done many with pin holes. Duct tape the out side and when the sealing is done it forms a skin on the inside and the tank will not leak. Clean sand and paint the out side. I am happy with the product.
oldiron29

rustyfarmall · Jun 20, 2012

(quoted from post at 18:58:15 06/19/12) The 300 I am working on has a hole in the oil pan and a hole in the gas tank, both in the bottom where I assume water collected. Neither hole is bigger than 1/8" or so. Is there a reasonably permanent way to repair these or should I replace them? I was thinking about soldering the pan, but not sure if that would be suitable or not, and I have no idea about the tank. For now I will be using a 1 gallon plastic tank to get the engine running. Any advice will be much appreciated. By the way, I tested the starter and it did turn the engine over, thank you for all of the advice.
Zach

I had an oil pan from an H that was not only leaking, but was dented right where that leak was. Thought I would try and get the dent out first by hammering from the inside, so I placed a hammer against that dent and then hit that hammer with another hammer. Yes, that dent came out, but at the same time the first hammer went right through the oil pan, creating a BIG hole. I fired up the torch, cut that oil pan into 2 pieces, threw it on the iron pile, and went out and found another oil pan.

riverbend · Jun 20, 2012

The front corner of the oil pan on my H has been welded. It has never leaked since I have owned it.

Gas tanks can be welded too, but there is a slight risk of an explosion... Try Bill's Repair in Plato, MN. I think he had several 300s around. I don't know if the gas tanks are any good.

Greg

JRSutton · Jun 20, 2012

I'd take that approach too.

Problem is - if it rusted through in that one spot, you can braze it or whatever, but is it about to pop through somewhere else?

The liner essentially gives you a new tank on the inside that you don't have to worry about.

Ed in Texas · Jun 20, 2012

On one of my H"s, someone before me used JB Weld to coat the outside of the oil pan. Don't know how long it had been done, but it didn"t hold, leaked; I replaced the oil pan. Just another lesson learned.

GordoSD · Jun 20, 2012

I have a very good tank. Has been sandblasted and epoxy primed. Clean inside.

Oil pan and gas tank leaks

Zachary Hoyt

Well-known Member

mkirsch

Well-known Member

Dean Olson

Well-known Member

Oldiron29

Well-known Member

rustyfarmall

Well-known Member

riverbend

Well-known Member

JRSutton

Well-known Member

Ed in Texas

New User

GordoSD

Well-known Member

Similar threads