Blower Motor Replacement
Thread Starter
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Blower Motor Replacement
I've got the blower motor out of the AC box and the replacement with the larger squirrel cage ready to install. From what I've read on this forum, I need a 3/4" spacer to install the motor with the larger fan attached.
But mine shows a lot more than 3/4" difference in height from the plane of the firewall to the bottom of the fan. So the question is, does this space need to be accounted for? Should I make a spacer that's a full inch thick?
Also the hole for the blower motor vent tube that goes into the AC box...it's in a different position with this new motor. What do ya do about that?
But mine shows a lot more than 3/4" difference in height from the plane of the firewall to the bottom of the fan. So the question is, does this space need to be accounted for? Should I make a spacer that's a full inch thick?
Also the hole for the blower motor vent tube that goes into the AC box...it's in a different position with this new motor. What do ya do about that?
Thread Starter
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Re: the vent tube for the blower: If I line up the flat sides of the fan flanges, (there are two on the new one) the vent tube hole is 90* off one way, and 180* off the other way.
Thread Starter
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Thanks Man I appreciate the input and I agree with the 1/4" assessment. It would be great if there was an easy way to measure this!
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
I think you have it in your pic.. Measure the differance between the two mounting plates and go with that. Does the motor bolt to the plate? If so you may be able to rotate the plate in relation to the cooling hole opening to get it to line up. If permanetly pinned to plate than that is a bigger problem. mike...
Racer
Joined: Aug 2010
Posts: 303
Likes: 0
From: Fresh Meadows New York
the extra 1/4 inch is prolly lost in the housing...the original blower prolly had at least a 1/2 clearance... just guessing here... i installed a biger blower a long time ago and i dont think i spaced it a full 3/4... i used rubber gaskets, actually i cut my own from gasket material from a plumbing suppy house..
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Burning Brakes
Joined: Nov 2006
Posts: 893
Likes: 7
From: Orange Park Florida
The upgrade fan motor I purchased from Willcox had a hose "fitting" attached - I believe 5/8" in diameter and about 1" in length. I could not reuse my old damaged rubber vent hose so I used a piece of flex hose to connect to the AC/Heater box.
Thread Starter
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
The motor is riveted to the flange, and that's prob a good thing to keep it from vibrating loose. I may go to another parts house & compare brands on these things before doing the final install. I'm dying to drive the car though - it's a perfect-weather-week here in San Diego and I don't wanna drive her with a big hole in the firewall .... 
