Quote:
Originally Posted by Zeke3
As others have said, you don't need the 6328 drain pipe on a post war engine with a rope seal. The purpose of the hole in the rear main cap was to drain oil from the labyrinth type, "slinger", oil seal. My 1937 parts book says the 40-6328 had a check ball at the end and was special equipment, which I took to mean it was not used on every engine.
I checked the rear main cap from my 1937 21 stud engine and the thread is much finer than a 1/4" npt, which has 18 tpi. I think it may be 28 tpi and a 15/32" drill bit fits in the hole, 0.469 in. diameter. I will post a picture of the hole when it finally makes it through to my e-mail.
|
Thank you everyone for the reply advice and measurements. I will talk to my buddy and let him know put the pan on . Do we have to plug the hole for the tube or leave it as is?