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Tech Question
Billy Martin, Ann Arbor MI, 1972 Plymouth Valiant 318
Hello, Since you guys are the guru's of the mopar scene I figured I would come to you with my dilemna. I have a 318 valiant in which I put a new Edelbrock intake on, Holley carb, Hedman headers and a few cosmetic changes as well. Problem is that I filled the radiator with coolant and before even starting it was leaking by the back of the block. I cannot tell where exactly it is coming from. I looked under the car and it seems to be dripping throught the trans/engine mating surface (even though I never even touched those bolts!). Can you help?
Thanks, and keep up the great work!
Billy-
Hmmm. Assuming that the engine is original, or hasn't been rebuilt totally in many moons, the problem is surely that the core plugs in the rear of the block have rusted through. These take about 2 minutes to change -- once you have the back of the block accessible (i.e., transmission, bellhousing, yada, yada.)
I know this isn't what you wanted to hear. At least now you know why they sell those "lifetime" brass core plug sets!
I should also mention, even thought it doesn't exactly fit your description of the leak location, that the heads are syymetrical, and have water passages at the intake flange front AND rear. The intake manifold simply blocks off the rear pair. But if the gasket seal is screwed up somehow, I can visualize coolant running down the back of the block, into the clutch / t'converter housing, and out the bottom.
Rick
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