Thread: B&M Blower leaking oil

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For you drag racing guys, here's my problem. I have a 411 B&M Blower on my Ford 289 and it is leaking oil out of the case filler nipple onto the intake manifold and down the engine. I have covered the nipple with a dress up hose leading to a blank stud on the carburetor to remedy the problem but I am leary about puting a plug on it or blocking it in any way. It only leaks out the nipple while under power on the feeway at higher speeds (and higher pressure no doubt). I just put the blower on a few weeks ago and don't know if I am missing a valve that covers this nipple or if the case will eventually find a neutral level and stop leaking. Perhaps it is overfilled? Please see photo for clarification. I can take more pictures of the nipple absent the dress up hose if needed. Any and all help would be GREATLY appreciated as blower knowledge seems to be sparce in my area.

Here is a shot without the hose.

I had the same blower on my car and that is the fill hole. Down the front of the case behind the dist. you will see another plug. That is the level plug for the oil. If you over fill the blower then it will blow out the front seal after a while and lose all the bearings and cause the rotors to smack together. Not good! If I remeber correctly you only need about 4 oz of 90w oil to fill it. I use to use B&M trickshift tranny fluid instead and that will filled an extra 2 oz because of the light weight.