Freeze plugs
#1
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Freeze plugs
Ok, here is my delima. I have a gen 5 BBC, I have a few oil leaks to work out so I pulled the engine this fall. I have the engine on a stand with the valve covers, oil pan and manifolds removed. I pulled the drain plugs on the block and the water started draining. I assumed it would continue to drain but the right side apparently clogged up. So here is the bad part, the freeze plugs popped out of the right side of the engine, the side with the starter. I am going to have it magnifluxed, what do you guys think?
#2
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Not a good sign, sounds like it froze at some point. Get it checked.
#5
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From a previous post. Do a search on this topic.
The term "freeze plug" is wrong. They aren't there to keep the block from cracking if frozen. It just happens that they sometimes pop out when the coolant freezes.
Proper term is 'Core Plug". That's how the foundry gets the sand core out after casting the block.
You are doing the correct thing by testing the block. If you don't see a crack you probably will be good.
The term "freeze plug" is wrong. They aren't there to keep the block from cracking if frozen. It just happens that they sometimes pop out when the coolant freezes.
Proper term is 'Core Plug". That's how the foundry gets the sand core out after casting the block.
You are doing the correct thing by testing the block. If you don't see a crack you probably will be good.
#7
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#9
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Outside of the bock is visually not cracked. Someone said the lifter area may crack. How are you guys pressure testing? Do you plug off the water inlets and thermostat housing the run air pressure? I would think about 25-30 psi.
#10
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I don't think that would happen with one side half full. Look close at the top of the block where the heads bolt on. That's where the last motor I bought had broken at. Sadly it was inside and out.