Lower Radiator Hose...ARRRGGHH

[67c10rustbuket]

Originally Posted by 72farmer

I am having issues with this also.I tried the Gates 20843 and the water pump end is too small and will not slip on.

Turn the hose around, you have it backwards. 1.75" connects to the water pump, 1.5" connects to the radiator. But 20843 is for 73-8X trucks. If you want to get the 20843 hose to work on a 67-72 radiator you will have to stretch the rad end (1.5" ID) over the radiator connection which is 1.75". The water pump size never changed on Gen 1 SBC 67-72,,73-87..., BUT the rad connection DID on GM trucks on the 73+ models. 1.75" connects to the water pump, 1.5" end connects to the radiator. I think I mentioned this on your other thread?