reverse cooling 5.7

[allweld488]

Ok,I have a 87 tbi k20 truck but it has a 91 engine in it that has the reverse cooling in it, does anyone know the benefits of this or is this engine even suppost to have it? it seems a lot harder to get it full of coolant and it builds a lot of pressure IMO because its constantly pushing coolant into radiator until the thermostat opens, which takes alittle while, it just seems like a lot of un needed pressure to me. if this motor was never meant to be reverse then maybe that explains it, but I am un sure of that, any thoughts would help.

 

[skysurfer]

The pump has a reversed-vane impeller for the serpentine belt but the flow of coolant through the engine is the same. True reversed flow cooling was introduced in the 1992 LT1.

 

[89Suburban]

The pump has a reversed-vane impeller for the serpentine belt but the flow of coolant through the engine is the same. True reversed flow cooling was introduced in the 1992 LT1.

^^^This.

 

[scottybaccus]

If you have the serpentine drive, keep the reverse flow pump. If you have v-belts, you need the pump made for your truck. You would certainly experience problems circulating coolant if you have a mixed match.