High Output Blower Fan? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76HighSierra · 07-19-2004, 04:21 AM

I've always found that the blower fan on my '76 doesn't produce enough volume for my liking. The A/C blows cold in the summer and the heater blows hot in the winter, but I can't help wishing it didn't produce just a bit (ok, I lied.....ALOT) more volume. Is there some sort of aftermarket high output fan available? Or, does anybody know any tricks to help this problem? Every 73-87 truck that I've owned oir driven has been the same way. Please don't tell me that it's something that I'm just going to have to "live with". :p

SanitysBane · 07-19-2004, 09:53 AM

what about a blower for a surburban or a van?

**N2TRUX** · 07-19-2004, 12:05 PM

Have you looked at all the foam gasket around the duct's. It dries out and falls out over the years. Look at sealing you air ducts and it might make a big difference...

apstguy · 07-19-2004, 02:01 PM

The fan does kinda suck. Re-sealing the ducts does help. You also might want to check if the upper mounts to the HVAC box aren't cracked. Mine are so it has a slight gap at the top where it looses some air. Supposidly the A/C fans blew more air but my A/C fan still sucks.

76HighSierra · 07-19-2004, 03:30 PM

Quote:

Originally Posted by N2TRUX

Have you looked at all the foam gasket around the duct's. It dries out and falls out over the years. Look at sealing you air ducts and it might make a big difference...

This is most likely the problem. When I put in a more modern head unit, and had the dash bezel off, I noticed that none of the joints in the ductwork had ANY sort of foam or tape sealing them off. The mounting flange has no breaks and I recently replaced the old noisy fan with a new Seimens unit. Made no difference in air volume, it's just MUCH quieter!

07-19-2004, 04:21 AM	#1
76HighSierra DAMN, I love Big Blocks! Join Date: Aug 2003 Location: New Mexico, USA Posts: 619	High Output Blower Fan? I've always found that the blower fan on my '76 doesn't produce enough volume for my liking. The A/C blows cold in the summer and the heater blows hot in the winter, but I can't help wishing it didn't produce just a bit (ok, I lied.....ALOT) more volume. Is there some sort of aftermarket high output fan available? Or, does anybody know any tricks to help this problem? Every 73-87 truck that I've owned oir driven has been the same way. Please don't tell me that it's something that I'm just going to have to "live with". :p __________________ Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear.

07-19-2004, 09:53 AM	#2
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	what about a blower for a surburban or a van? __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

07-19-2004, 02:01 PM	#4
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	The fan does kinda suck. Re-sealing the ducts does help. You also might want to check if the upper mounts to the HVAC box aren't cracked. Mine are so it has a slight gap at the top where it looses some air. Supposidly the A/C fans blew more air but my A/C fan still sucks. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

07-19-2004, 12:05 PM	#3
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Have you looked at all the foam gasket around the duct's. It dries out and falls out over the years. Look at sealing you air ducts and it might make a big difference...



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