Question on LT1 cooling FANs.
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Question on LT1 cooling FANs.
I just noticed while doing the heater core bypass on my '92 LT1 and testing for any leaks afterwards, that when the temsp hit 228F, One Fan went on, but the other one did not. 
The one on the Drivers' side went on, cooled the car to 215F in a minute or two, but the otehr one on the passenger side didn't.
Aren't they both supposed to do this?
I pulled the relays and they both are working fine. (Tested the contacts and internat switching.)
Anyone know why ?
The one on the Drivers' side went on, cooled the car to 215F in a minute or two, but the otehr one on the passenger side didn't.
Aren't they both supposed to do this?
I pulled the relays and they both are working fine. (Tested the contacts and internat switching.)
Anyone know why ?
Race Director
Joined: Aug 2003
Posts: 11,043
Likes: 3
From: San Jose Pat Tillman - American Hero
Originally Posted by MrNuke
Ohh... So if everything is working well, the passenger-side fan will never go on right?
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Yeah i will be installing a manual switch, but was just making sure that it was normal for the 2nd fan not to go on..Since the car never hits 237F guess it'll never happen..LOL
Le Mans Master
Joined: May 2005
Posts: 7,373
Likes: 2,288
From: Central Maryland
As others have noted here, the driver's side fan is the primary fan, and it will kick on before the secondary fan will.
Rather than installing a manual switch, and having to switch them on/off at lower temps yourself, why not reprogram the ECM to kick your fans on at whatever temp you like? I did this on my '94, and am very pleased with the result.
Be well,
SJW
Rather than installing a manual switch, and having to switch them on/off at lower temps yourself, why not reprogram the ECM to kick your fans on at whatever temp you like? I did this on my '94, and am very pleased with the result.
Be well,
SJW
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Originally Posted by SJW
As others have noted here, the driver's side fan is the primary fan, and it will kick on before the secondary fan will.
Rather than installing a manual switch, and having to switch them on/off at lower temps yourself, why not reprogram the ECM to kick your fans on at whatever temp you like? I did this on my '94, and am very pleased with the result.
Be well,
SJW
Rather than installing a manual switch, and having to switch them on/off at lower temps yourself, why not reprogram the ECM to kick your fans on at whatever temp you like? I did this on my '94, and am very pleased with the result.
Be well,
SJW
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Cruising
Joined: May 2006
Posts: 10
Likes: 0
From: Modesto CA
yea my 92 runs really hot, I bought a 160 thermostat but it still gets up into the 210-220 if im at a light. I looked in a summit catalog, Hypertech makes a switch or something that turns your fans on earlier, instead of the fans turning on at 226 they will turn on at 176 and off at 166. but its 43 bucks. Have you guys heard of this? Is it worth it?
