Not Your Typical Oil Leak

[1oldtruck]

Ok, here's my dilemma. I've had an oil leak for the last few weeks and I traced it to the oil filler pipe. The oil leaks from where the pipe fits into the crankcase. Now, I know that I don't have too much oil so I'm thinking that the oil splashes around while driving and leaks out and runs along the crankcase and drips to the ground.

 

Was there a gasket or extra sleeve that held the pipe firmly in place? I don't want to make something that would deteriorate and melt and fall into the crankcase. My filler pipe is a little loose. 

 

Any suggestions?

 

 

[Jeff Balazs]

When I first got my truck the filler tube fit loosely too. I dug around in some old plumbing fittings and found a reducer that I could use as a forming spud. You could use something else......just needs to be something with a taper that will slide into the tube and snug up. The idea is to slightly expand the tube until you get a good interference fit. Once I got a good fit I slipped a heavy o-ring over the tube then put a little permatex on the tube and tapped it into place. It does not leak and the o-ring helps to keep water etc... out.

 

Hope this helps.

Jeff

[P15-D24]

Pull the tube and look for cracks, There should be a brass flare fitting on the block, and the the steel oil tube should have the mating flare fitting. 

[NiftyFifty]

I pretty much did the same as Jeff, I flared out the engine side of the tube and then put a large o-ring on it with some ultra black rtv silicone. Hasn't leaked since then!

[JBNeal]

I've got access to a blacksmith anvil, and the horn on that old iron flares out the filler pipe perfectly.  But more common materials can open up the tube diameter: using a couple of pliers or almost-closed crescent wrenches can be used to work the metal outwards, or whittling a 2x2 down to a taper as a forming tool, maybe clamping a round bar in a bench vise and peening the tube over it...all ya need is for the tube OD to be a hair less than the crankcase hole ID.  I have not needed to use RTV on the tubes I've worked over, but it won't hurt, and if it's a tight fit, ya won't need but to smear the RTV thin on the tube surface for it to work.

[1oldtruck]

Thanks. I plan on working on it tonight if possible. I'll let you know how I do.

 

Matthew

[ggdad1951]

Swedge it out a little. Should be a snug fit