radiator fan???
Thread Starter
Racer
Joined: Mar 2004
Posts: 305
Likes: 0
From: Houston Texas
radiator fan???
Under normal driving conditions, in the city, at what temperature should the radiator's electric fan come on?
This is on a 1985 Coupe, automatic transmission.
(The previous owner wired the fan to run all of the time. I am replacing it today, and want to make sure that it will turn on when it's supposed to.)
This is on a 1985 Coupe, automatic transmission.
(The previous owner wired the fan to run all of the time. I am replacing it today, and want to make sure that it will turn on when it's supposed to.)
Melting Slicks
Joined: Jan 2002
Posts: 2,531
Likes: 35
From: Lecanto Florida
On my 87, I believe the normal fan comes on at 220. There's an auxillary fan in front of the radiator that supposed to come on at 230, but I wired it so I can turn it on any time I feel I need it.
The fan will also come on as soon as the air-conditioner is used and most "chips" will turn the fan on around 200, at least mine does.
The fan will also come on as soon as the air-conditioner is used and most "chips" will turn the fan on around 200, at least mine does.
Instructor
Joined: Aug 2004
Posts: 188
Likes: 0
From: Oxnard CA
St. Jude Donor '05
Originally Posted by jfb
GM says the main fan comes on at 228 F and the auxilliary fan at 238 F.
I just ran into this last weekend while on a date. The brushes crapped out in my primary fan and I didn't start cooling down until the coolant hit 238.
Put a bybass switch in to turn the fan on and off independantly. It is easy Take a hot lead from your battery or alternator (prefered) go to the switch (located in the cockpit for conveinence) then back out to the hot lead of the primary fan. Once you flip the switch, the fan will energize
Bob
Thread Starter
Racer
Joined: Mar 2004
Posts: 305
Likes: 0
From: Houston Texas
Originally Posted by mikey whipreck
BTW, you may or may not have an auxillary fan. Have you checked?
I installed the new fan motor last night. That was easy. Now I have to figure out what exactly the previous owner did to make the fan run continously.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
He grounded the green wire from the fan relay. But....the fan doesn't need to run continuously and it isn't needed above 35 mph. Yes, I know you are concerned about the soaring coolant temp in slow/stop traffic, but as long as the coolant stays below 260 F (shut off your engine at 260 and let it cool down), your engine will not be harmed!
Thread Starter
Racer
Joined: Mar 2004
Posts: 305
Likes: 0
From: Houston Texas
Originally Posted by jfb
He grounded the green wire from the fan relay. But....the fan doesn't need to run continuously and it isn't needed above 35 mph. Yes, I know you are concerned about the soaring coolant temp in slow/stop traffic, but as long as the coolant stays below 260 F (shut off your engine at 260 and let it cool down), your engine will not be harmed!
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