fan shroud

[jim ellis]

an anyone tell me if the fan shroud is different for a heavy duty cooling (4 core) than a (3 core)? Installed a 4 core radiator in my 1969 C-10 and now fan seems to be slightly to deep in shroud. Everything I can find listed on parts sources says shrouds are the same. Anyone have any ideas?




Thanks
jim ellis

[TBONE1964]

Originally Posted by jim ellis

an anyone tell me if the fan shroud is different for a heavy duty cooling (4 core) than a (3 core)? Installed a 4 core radiator in my 1969 C-10 and now fan seems to be slightly to deep in shroud. Everything I can find listed on parts sources says shrouds are the same. Anyone have any ideas?





Thanks
jim ellis

All small block 2wd trucks have the same shroud unless it has AC. The difference in changing the radiator from the 3 core to the 4 core is in the fan spacer. You probably have a 2 inch spacer now and you need a 1 1/2 spacer.

Hope this helps.

Take care,
Tom

[jim ellis]

Sorry forgot to say my truck has a clutch fan



Thanks again
jim ellis

[FirstOwner69]

Here are 2 pictures of the 2 types of fan shrouds for small blocks. The only difference is the depth of the portion surrounding the fan. The picture of the shrouds back-to-back clearly shows the difference. Otherwise, they are identical. Trucks with A/C had 4 core radiators, fans with clutches and used the shallower shroud. I thought non A/C trucks with HD cooling also had 4 core radiators and fan clutches along with the shallower shroud. I trimmed one of the deeper shrouds with a jig saw to work on my 69 with A/C. As I recall I cut off 3/4" or 7/8". It appears identical to my original.

[Boog]

Your water pump affects how deep the fan sits in the shroud also. The 67-72 water pumps are about 3/4" shorter than the later model pumps. I have a similar situation going on with my 69. I have a 350 with the later model water pump and accessory setup. The engine mounts are in the v8 location and it has a 4 row radiator. I am considering an electric fan.