Thread: stuck 478
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Old September 21st, 2013, 04:38 AM
Foley Foley is offline
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Default Re: stuck 478

I say don't force it too much. Just get it loose. A few days isn't much time. I've had them soak for months before coming loose. If it's one or more pistons that are stuck, use whatever penetrating concochun you think is best. WD 40, Diesel fuel, Marvel Mystery Oil, Automatic transmission fluid, and some guys even swear by coca cola. Many people use a mixture of one or more of the above. If it's lower end, then getting those main bearing caps off will help and may show what's seized. If you run out of patience, do like Bigblock suggests and pull the heads. Good luck
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