1) What is the proper distance between the fan clutch and radiator? How close can I get to the radiator without causing damage during normal operating conditions?
2) If I should have a fan spacer (Part # 535253) on the water pump shaft.
I have a 69 Firebird which according to PHS came from the factory with 400 and turbo 400 which cam run a little high temp from time to time (208-230). I do drive it to work everyday and sometimes hit traffic, so the Southern heat and humidity takes its toll on the car.
All the engine components are stock and doesn't appear to be missing anything (that I know of), so I am curious if it should have a fan spacer on there between the water pump and the fan.
I am currently running the original 7-blade factory fan (#9796134) with the factory water pump pulley (#367161BM). The car also has a brass 4-core radiator on it.
There appears to be some room (2-1/2") to draw the fan closer to the radiator. I want to make it right and do whatever I can to make the engine run cooler without making aftermarket modifications to it. Did the car came with the fan spacer (#525253), however this piece is also 2-1/2" in length. That of course makes me wonder if fan clutches vary in size and depth. Or, maybe the radiator is a replacement and also differs in size from the original 4-row one.
I would like any advice from anyone who has a 69 factory 400 and if you could tell me if the 400 Firebirds came with a fan spacer. Thanks in advance guys.
