Fan blade not centered in shroud - Team Camaro Tech
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post #1 of 4 (permalink) Old Oct 21st, 02, 02:43 PM Thread Starter
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Join Date: Jan 2000
Location: Maryville,TN
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I am having problems with my fan blade not aligning with the shroud on my '68 small block. The engine is a 350, I'm not exactly sure which motor mounts I have, but the engine sits about 1/2" off center toward the passenger side. Because of this, the fan blade hits on the side of the shroud.

I had the same block and motor mounts in a previous car and didn't have this problem. The only difference is that I have a new core support now, the other one was rusted out. The front sheet metal appears to be on square if I measure from the center of the windshield to both front corners. The hole in the bracket that the shroud mounts to is centered between the fenders, but the radiator itself is not, in fact it looks like the radiator is offset 1/2" in the opposite direction than the motor.

Any ideas? Thanks in advance.

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post #2 of 4 (permalink) Old Oct 22nd, 02, 02:14 AM
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Location: Va Beach VA
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I would do the following,

Measure from the cowl bolt, the very top bolt for the fender, and measure to the opposite corner of the hood opening. This measurement would be for squareness of the front sheet metal.

Secondly, at the front of the car, look straight down at the harmonic balancer. It should be directly over the little channel from the main crossmember to the front member. Any difference would mean two different heights of the chassis stands, thickness of the vibration mounts, or the transmission mounting is askew.

If you saved the old radiator support, I'd measure the two and compare hole locations as well as the mounting pads on the frame.

If all else fails to show any deviations, you might have to get a BB shroud to compensate for the relocation. But, general rule of thumb, a SB car, everything is centered.

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post #3 of 4 (permalink) Old Oct 22nd, 02, 02:50 PM Thread Starter
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Thanks for the reply Everett. I checked the measurements from the cowl bolts to the opposite corners, and everything looks square within about 1/8".

Looking down on top of the balancer, it appears to be centered on the channel, but I think it really is off center by a little bit. If I measure from the air cleaner stud to inside both fenders, it is about 1/2" off center toward the passenger side.

I looked in a couple catalogs and see that there are several different shrouds for small blocks, and on some the area where the fan fits into is definitely off center.

I don't have my old core support anymore to double check the hole locations.

I guess I need to go to a supply house and measure shrouds, or go with an electric fan.


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post #4 of 4 (permalink) Old Oct 22nd, 02, 06:37 PM
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Join Date: Jun 2001
Location: Rochester Mn
Posts: 7,749
Is your car a small block or a big block ?
Big block engines are offset!!
This is accomplished by the frame stands and not the actual motor mounts.
What was or is the car originally?
Could you have a mismatch?

69 Camaro Z28 "clone" - 327 AT
"461" camel back heads,
edelbrock , hooker, ultradyne cam, stewart,
TRW etc.
Vintage Air (not yet installed)
700R4 TPI transmission
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