Oil Pump Bolts Question

[Yo Hoot]

Do the oil pump bolts go through the aluminum gear case and thread into the cast iron or do they thread into the gear case only?

Reason I ask is I have an oil leak that looks like it may be coming from that side of the case. These would be the only bolts in the area applying clamping force to the gear case.

My leaking is here coming from where I can't see no matter which way I try to look. It runs down to the front corner of teh oil pan and drips about a 2" puddle every time I park. I had the front cover gasket replace and the front main seal. That part is dry. Any help would be appreciated.

If that side of the gear case is not clamped well I may come up with some sort of external clamping solution to stop the leak instead of doing that horrendous gear case gasket job.



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[Joseph Donnelly]

The oil pump bolts directly to the block, and its four mounting bolts go directly into the block. The gear case fits around it but does not touch the oil pump. You can see four holes in the gear case surrounding the oil pump area. These bolts also go through the stamped steel cover. There is another hole in the gear case above the oil pump and towards the center of the engine that has a “hidden” bolt inside the gear case cover. This bolt goes from the gear case into the block.

 

[Yo Hoot]

Thanks Joe.

So you are saying those four bolts go through the gear cover and the gear housing and into the block. This is where you get the gear housing clamping to the block around the left side.

Now I'm really stumped as to where the oil is leaking from. Everything around that upper area looks like water jacket holes.