1969 1/2-1981 Pontiac Buick and Olds coolant sleeve seal inserts 1985 We developed this hi flow

We developed this hi flow pump because of frequent reports of overheating in Broncos with the 5

8L Blue Flame 1953 - 1955 Chevrolet Truck 235 3

Conventional thermostats for these engines open to 1

The 4-1/2" taller more common pump is 1649

2L gmc r2500 89-87 V8 379 6

1969 1/2-1981 Pontiac Buick and Olds coolant sleeve seal inserts 1985 We developed this hi flowA pair of coolant sleeve seal inserts for 1969 1 2 to 1981. Corresponds with Gm part number 9796347. These bridge the gap between the divider plate and the timing cover and ensure that the freshly pumped coolant actually flows through the block rather than around in circles inside the water pump cavity of the timing cover. What's the coolant path ? The water pump circulates coolant from the radiator into the block by pumping coolant through the water