Dreaded Milkshake
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I am getting ready to tear off the manifold now to check for a water leak at the coolant crossovers.
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I found the leak! There is a 2 1/2" long crack under the intake running parallel with the deck of the block and the lifter valley. This is common with older 350 blocks. I am sure I magnafluxed the block prior to machining it. Either I missed it initially, it cracked when torquing down the heads, or some other unknown force I am not aware of.
I am performing emergency surgery as we speak... I will post before and after pictures when I am done with the repair. The process involves drilling, tapping and loctiting cast iron pins along the crack until you reach the ends of the crack. It should be a permanent repair. I will keep everyone posted. I should have it back out on the water tomorrow.
I am performing emergency surgery as we speak... I will post before and after pictures when I am done with the repair. The process involves drilling, tapping and loctiting cast iron pins along the crack until you reach the ends of the crack. It should be a permanent repair. I will keep everyone posted. I should have it back out on the water tomorrow.
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Thats a sketchy fix at best. It may do the job in a car engine but your taking chances in a marine enviroment. It's that constant 4000-5500 rpms that really tears $hit up! Good luck, I hope it works for you.
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No chit, guess you can always learn something here. Still makes me wonder how the oil temp dosen't just climb out of site without one, dosen't seem like there would be enough air movement thru the bilge to control it. Well, I stand corrected.
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BTW, I pressure tested the repair up to 40 PSI after it was complete and found that the crack extended further than it actually appeared. I went ahead and extended the repair until it was out of sight. Hopefully I got to the end of the stress riser... We will see how it holds up.