COPO fan clutch problem

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nuch_ss396 · #1 08-12-2007, 06:31 AM

Steve,

I've never heard that 3 vs. 4 core radiators used different
fan clutch assemblies. As I mentioned, I do know that the
SB & BB are different lenghts and many use the SB clutch which
puts the fan too close to the radiator. I wish I could
remember the two lengths ( SB and BB ). I'm sure someone
on this board knows or can take a quick measurement.

Since you mentioned COPO, I'm assuming you're doing a BB car.

Steve

Denis · #2 08-12-2007, 06:28 PM

There isn't that much space between the fan and radiator even when the correct original BB setup is used. How much space we talking about?

Keith Tedford · #3 08-12-2007, 08:51 PM

Our '69 L78 Chevelle has about 2" between the fan and the 3 core rad. A four core should be a good fit as well. Better than an inch of the fan is out of the shroud. All '69 and later Chevelle's ran the long water pump setup. Our COPO Chevelle came with the BO 3 core radiator and I believe that this same rad came on the L78 cars.

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