Oil Cooler Adapter Oil Leak

[GT350Mike]

Originally Posted by blykins

It’s already broken through, that’s why it’s leaking. Two BBM blocks that I have here are like that. I caught one when I primed it. The hole isn’t that big, prob .060” or so, but it’s enough.

The fix is what I described up above. Put some silicone in the hole, put some under the bolt head and washer.

I also think you could get a short 5/16-18 set screw, coat it in silicone, then screw it all the way in until it bottoms out, then bolt the adapter on.

Brent, does this fix the oil adapter leaks on just the BBM blocks or does it also apply to OEM SO blocks? I don't think my Precision Oil Pump adapter has any stress cracks so either my steel hydraulic hose fittings are leaking or it's coming from the upper left bolt.

[blykins]

Factory blocks are not drilled through. We normally don't have issues with factory stuff. The aftermarket stuff can be challenging. The BBM blocks have holes that have been drilled too deep and the older Pond blocks aren't drilled deep enough.

You probably have a fitting that leaks, or a spot where the gasket is not intact.