1994 Chevy S-10 Reverse flow water pump

1994 CHEVROLET S-10
160,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RBIGELOW1
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  • 1 POST
Can I install a reverse flow water pump on a stock engine, 4.3 v-6? Do I need to make any modifications? It is listed as a standard part by Napa and my research shows reverse cooling is better for the engine, but on the engines manufactured for reverse cooling (lt-1) the thermostat is different and the cooling passages in the engine are routed differently.

Simultaneously I am switching to an electric cooling fan for the radiator.

Tank you
Jun 9, 2008 at 2:02 PM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
I would replace it with what it had before. Is there an overheating problem? If so have the cooling system chemical tested first for a blown head gasket. Seen it many times on those engines, they even crack heads on occasion (thin-wall castings)
Jun 10, 2008 at 12:50 AM
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