Oil Filler Tube
 

Just rebuilt engine and now it blows oil out the filler pipe when driving 50 mph. Ordered a oil breather set up to mount on filler pipe but just wondering what caused this problem when it didn't do it before. Also was wondering if a filler pipe and lid from a B model would stop this problem. My filler pipe has some baffels in it but the lid doesn't have anything inside it.

Re: Oil Filler Tube
 

Probably the new rings haven't seated yet, allowing more blow-by than usual. The problem should abate with some more miles.

Re: Oil Filler Tube
 

Re: Oil Filler Tube
 

My grandson's 30 Tudor did the same thing after the engine was rebuilt. It turned out the breather pipe was from a 28 and it looked like someone had messed with baffle flutes. The engine rebuilder suggested we install a breather from a 32. All the suppliers were out of stock with the reproductions . We obtained an original from Sammy (a good guy to do business with) at Arizona Vintage. When installed it, it did the trick.

Tom Endy

Re: Oil Filler Tube
 

I agree with Chicago Bob. Put some more miles on it. Vary the speed and load the rings both under load and against compression.

Don't ever put anything inside your filler pipe. It will build up crankcase pressure and the oil will go out the rear main.

Throw an old gym sock over the cap and tube. It will catch most of the mess and just throw it in the trash and put on another when it starts to drip or when you want the engine to look nice.

Richard
Anaheim CA

Re: Oil Filler Tube
 

Buy small black dress socks.

Re: Oil Filler Tube
 

This slide may help you:

Re: Oil Filler Tube
 

Thanks everyone for the information. I'll make sure the baffels are turned right and use a sock till it stops slobbering.

Re: Oil Filler Tube
 

I had the same problem with my rebuilt engine several years ago,I had a B fill pipe and cap so I installed it and solved the problem. Its still on there with no leakage.

Re: Oil Filler Tube
 

Several after market filler pipes were made incorrectly resulting in the problem you have. To be sure, I would call Steve at Bert's Model A and get the correct one. It could also be as stated above; this problem may go away after a break in period.

Re: Oil Filler Tube
 

I have heard of the B-tube and cap thing before, but have never tried it.

Re: Oil Filler Tube
 

I had the same problem a few years ago. I put a plastic CHORE BOY inside the cap and that solved the problem for me.

Re: Oil Filler Tube
 

I have some originals if you decide to go that way. Need month and year of build to get proter one. Larry

Re: Oil Filler Tube
 

The brass/copper chore boy would work too. Either of which would be pores enough not to get plugged up.

Re: Oil Filler Tube
 

Wow, if the rebuild is so fresh that the rings haven't seated yet, it shouldn't be driven at 50 mph, IMO.

Re: Oil Filler Tube
 

Yup. My rebuilder said keep it under 35 for the first 300 miles. I took her out for a 20 mile ride each evening and went up and down hills, coming on and off the throttle. You don't want a steady throttle for long periods of time until the rings seat.

Re: Oil Filler Tube
 

Same here, works like a champ.

JayJay