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NoBozo · 01-07-2013, 04:36 PM

The 454 and 502 (Mark V) V8s with (any) Bravo drives have TWO water pumps. One is called the raw water pump and the other is the engine circulating pump. Both are belt driven and I think it doesn't matter if the engine has "closed cooling".

NB

PS: Unless I'm mistaken, the engine circulating pump has a Rigid "metal" (cast iron..?) impeller and the raw water pump has a Rubber impeller.

01-07-2013, 04:36 PM	#7
NoBozo Senior Member Join Date: Jun 2008 Location: Portsmouth. RI Posts: 2,231 Thanks: 400 Thanked 460 Times in 308 Posts	The 454 and 502 (Mark V) V8s with (any) Bravo drives have TWO water pumps. One is called the raw water pump and the other is the engine circulating pump. Both are belt driven and I think it doesn't matter if the engine has "closed cooling". NB PS: Unless I'm mistaken, the engine circulating pump has a Rigid "metal" (cast iron..?) impeller and the raw water pump has a Rubber impeller.