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12-14-2016, 03:10 PM
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#1 |
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Registered User
Join Date: Feb 2008
Location: Surprise, Ariz.
Posts: 186
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a/c help 73 gmc p/u
i have a question about the fan cage hole on the firewall. i have a wider fan cage bought from autozone attached on my new a/c/ heater motor. Do i have to make the whole larger on the firewall. i know the motor gets attached to the evap housing. Is the old hole opening now good for air flow? thanks for any help. I am ready to install the evaporator , fan motor and housing to wall.
 frank 73 gmc 350 rv old granny 4 spd 3/4 ton
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12-15-2016, 08:49 AM
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#2 |
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Registered User
Join Date: Oct 2006
Location: Western IL
Posts: 358
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Re: a/c help 73 gmc p/u
IIRC, the fan will not go straight in. you have to tilt and "tuck" it in.
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12-15-2016, 05:13 PM
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#3 |
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Registered User
Join Date: Feb 2008
Location: Surprise, Ariz.
Posts: 186
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Re: a/c help 73 gmc p/u
RATSKIN, the hole opening is 5" round. the fan cage is bigger. there is not much room inside the hole for the cage to spin. When i attach the fan motor and cage to the housing , there is clearance for the fan to spin inside the housing. I can make the hole bigger, if necessary. Another scenario to buy a narrower cage.
thanks frank
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12-15-2016, 07:53 PM
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#4 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: a/c help 73 gmc p/u
Sounds like the fan they sold you is the wrong one for the heater housing.
Take it back and tell em you want one that fits. 
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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12-16-2016, 05:05 PM
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#5 |
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Registered User
Join Date: Feb 2008
Location: Surprise, Ariz.
Posts: 186
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Re: a/c help 73 gmc p/u
Thanks for all your help. i bought a shorter motor wheel. this should circulate the air through the housing , the passenger side damper and the windshield cowl. frank HAPPY HOLIDAYS
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