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yuccales · 10-23-2022, 06:19 PM

Could that sludge be from before you swapped engines and was left in the radiator and heater core? Hopefully your crate engine is ok and just needs a major flushing as said before. Good luck.

10-23-2022, 06:19 PM	#4
yuccales Registered User Join Date: May 2011 Location: Northern Calif. Posts: 3,613	Re: Sludge in coolant, high pressure Could that sludge be from before you swapped engines and was left in the radiator and heater core? Hopefully your crate engine is ok and just needs a major flushing as said before. Good luck.