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tubman · 01-05-2025, 08:15 PM

No answers yet, so I'll take a whack at it. Every 8BA I have ever seen (and it's been quite a few) had the two piece tube that terminates going back along the oil pan. Have I seen 'em all? Nope. Perhaps the industrial engines or maybe the big trucks (COE?) had something different. Unless the lower tube segment has a definitive factory installed look, I'd bet it was some homemade replacement after someone lost the original bottom segment and replaced it with something they had on hand.

I base this on the experience I have had with altering the stock 8BA road draft system. A few years ago, I replaced the tall original oil filler tube with a neat shorter chrome plated one. It looked great, but all of a sudden, I was getting oil all over the top of the engine. Replacing it with a stock height (but chrome plated) filler tube and all was well. I think that if you seriously alter the system, it will not work as well as it should. I believe a straight down tube would change the flow significantly.

You should be using a PCV system anyway.

01-05-2025, 08:15 PM	#2
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 12,147	Re: 8ba road draft tubes No answers yet, so I'll take a whack at it. Every 8BA I have ever seen (and it's been quite a few) had the two piece tube that terminates going back along the oil pan. Have I seen 'em all? Nope. Perhaps the industrial engines or maybe the big trucks (COE?) had something different. Unless the lower tube segment has a definitive factory installed look, I'd bet it was some homemade replacement after someone lost the original bottom segment and replaced it with something they had on hand. I base this on the experience I have had with altering the stock 8BA road draft system. A few years ago, I replaced the tall original oil filler tube with a neat shorter chrome plated one. It looked great, but all of a sudden, I was getting oil all over the top of the engine. Replacing it with a stock height (but chrome plated) filler tube and all was well. I think that if you seriously alter the system, it will not work as well as it should. I believe a straight down tube would change the flow significantly. You should be using a PCV system anyway.