blow by ?

[Model A Man]

Hi to all, what causes oil to come out of the oil fill tube? my wifes roadster is a strong runner and is an inserted motor (we have no idea who built the motor) when driving and stopping at a light you can see little puffs of smoke comming from under the hood and when I check it out, there is oil on the side of the block that appears to be comming from the oil fill tube. thanks for any and all input.

 

[Tom Wesenberg]

Too much blowby caused by worn rings. An old sock over the fill pipe helps to keep the engine clean, or you can add a road draft tube.

 

[Special Coupe Frank]

Whatever you do, do NOT block-up the oil filler pipe by stuffing something inside...

If that blow-by pressure cannot escape there, it will go elsewhere, usually the rear main, taking all the oil with it, leaving you with a dry crankcase, toasted bearings, and a fouled clutch to boot.

 

[Mike V. Florida]

Whatever you do, do NOT block-up the oil filler pipe by stuffing something inside...

If that blow-by pressure cannot escape there, it will go elsewhere, usually the rear main, taking all the oil with it, leaving you with a dry crankcase, toasted bearings, and a fouled clutch to boot.

A drained bank account, pissed off wife, and sleep on the couch.

 

[Duffy1]

How much oil does it use ?

 

[Patrick L.]

There is a difference in oil caps depending on the year. Apparently this was always an issue which Ford was trying to correct. It appears a '31 cap is supposed to be the best one. How much oil is this monster throwing ? Some is normal.