Roaring Fan Noise

[ccannon1953]

I need some basic troubleshooting with a really loud, roaring cooling fan on my 1996 GMC Yukon. Just installed a new GM crate 350 Vortec and I replaced the fan clutch at the same time...since then the fan just roars like it thinks its hot all the time..is it possible that I have the wrong clutch? Is there a CW and CCW rotation clutch or different temperature ratings? The fan is pulling so hard that the motor is losing about half its power during acceleration...How can I check this without spending $75-$100 on another fan clutch?

I would apprectiate any ideas..thanks

 

Charley

[dewfpo]

Compare the P/N to the one you took off with the previous engine. The clutches are matched for engine size, HP rating, vehicle etc.... so it's important to get the correct one.

 

DEWFPO

[Dans Denali]

Compare the P/N to the one you took off with the previous engine.  The clutches are matched for engine size, HP rating, vehicle etc.... so it's important to get the correct one.

 

DEWFPO

 

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You could have the wrong rotation clutch.

 

Dan

[ccannon1953]

Compare the P/N to the one you took off with the previous engine.  The clutches are matched for engine size, HP rating, vehicle etc.... so it's important to get the correct one.

 

DEWFPO

 

<{POST_SNAPBACK}>

 

 

 

You could have the wrong rotation clutch.

 

Dan

 

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[ccannon1953]

I think you may be right except that the threads on the clutch (where it attaches to the water pump) would be reversed ...I think....anyway, I am putting another one on this weekend and will let you know if it works..thanks for the feedback..

 

Charley