Block mounted circulating pumpsmust be of the marine type.
Automotive circulating pumps do not have bronze impellers, stainless backing plates
or stainless steel shafts. They will fail in a few months.
Sterndrives.com stocks a very good selection of quality circulation pumps for
GM small block engine and GM big block engines.
The 454 or 7.4L GM Big Block Circulation Pumps are part number 850454--1 for $229.00
(gaskets are included).
The 350 cid, 5.7L, 305 cid, 5.0L GM Small Block Circulation Pumps 850399--1 for $148.00
(gaskets are included).
We also know the scoop for the infamous Mercruiser 470
circulating pump
and what it takes to repair that coolant leaking from the bottom front
of your 470 aluminum block engine. Click here for more about the 470/3.7L leak issue.
