I just finished a total rebuild of '65 Mustang 289, A code. Professional block bore, boiled out, magnafluxed, cylinder head rebuild, crank line bore, etc, etc. Reassembly went well, I've rebuilt many engines (Ford 312, Ford 215, BMW, Jaguar, etc.) and all was ok. But when I go to start the engine for the first time, it started okay, I shut it down after running about a minute and a half to check things over and I find that the oil pan is full of white, foamy oil. About 3.5 quarts of antifreeze pumped into the oil pan and now I'm short of antifreeze in the radiator.

How could that much antifreeze mixture get into the oil pan? It's like it was pumping direct, not just a litlle leak in the headgasket, mind you - this is 3.5 quarts in under 2 minutes!!!!

Any ideas?

Thanks

 

Geez must be a pretty big leak/hole. You could pressurize the cooling system & listen for bubbling/hissing from around the engine? Sounds like you're probably gonna need to tear apart the engine again, depending on what's leaking [:@]

 

does it have a slevee init ?? has the block been decked?? heads resurfaced?? intake manifold sealed up good..??