Engine compartment exhaust fan (1 Viewer)

[toyolet2]

Hey guys. I just put a 6.2l in '89 FJ62. On the drivers side interior fender is an exhaust fan that comes on to help cool the engine compartment. When the guys pulled the engine bay apart, they did not mark the temperature relay that runs the fan. I have a Chiltons book, but the wiring diagrams do not incorporate the fan wiring. The 2 wire connector that goes to the fan is in place and plugged in, but I do not know where the temp contact switch was that powered up the fan. Any help would be appreciated

 

[TexFJ]

Hey guys. I just put a 6.2l in '89 FJ62. On the drivers side interior fender is an exhaust fan that comes on to help cool the engine compartment. When the guys pulled the engine bay apart, they did not mark the temperature relay that runs the fan. I have a Chiltons book, but the wiring diagrams do not incorporate the fan wiring. The 2 wire connector that goes to the fan is in place and plugged in, but I do not know where the temp contact switch was that powered up the fan. Any help would be appreciated

Isn't that the carb cooling fan? If you've swapped the engine, do you still need this fan?

 

[OSS]

The fan's purpose on the original 3F-E was to cool the manifold after the engine shut down. On the 3F-E it rarely comes on (unlike the 2F where it turns on after shutdown every time).
Since you've put in a V8, there's manifolds on both sides of the engine - so that fan won't do much good.
No other vehicle except the old land cruisers had that blower fan. Since you now have a modern engine- the fan can not be used and nothing bad will happen. It rarely turned on with the 3F-E anyway.

But if you really want it - it had a thermosensor mounted near the manifold and there's a black box behind the kick panel labeled Fan Relay (I think) that controls it

 

[toyolet2]

Isn't that the carb cooling fan? If you've swapped the engine, do you still need this fan?

I thought it was a manifold cooling fan. Could be carb, but my cruiser was FI.

 

[toyolet2]

The fan's purpose on the original 3F-E was to cool the manifold after the engine shut down. On the 3F-E it rarely comes on (unlike the 2F where it turns on after shutdown every time).
Since you've put in a V8, there's manifolds on both sides of the engine - so that fan won't do much good.
No other vehicle except the old land cruisers had that blower fan. Since you now have a modern engine- the fan can not be used and nothing bad will happen. It rarely turned on with the 3F-E anyway.

But if you really want it - it had a thermosensor mounted near the manifold and there's a black box behind the kick panel labeled Fan Relay (I think) that controls it

Thank you for the info. I live in Phoenix, so I think anything I can do to exhaust engine temp bay would be useful. Needless to say, the original thermo sensor is gone, so I will get a fan relay kit with temp control and tie it back in. I have an idea, now, where the original wiring for the relay is. Thanks again for the info.

 

[Seth S]

You could convert that fan into blowing out so it helps lower the pressure under the hood and helps with radiator cooling.

 

[TexFJ]

Idea really is to cool down the area where the gas mixture happened around the EFI/Intake manifold idea. don't want fires. The "carb cooling fan"name just stuck from FJ60s. I guess it won't hurt to keep it in to cool down the engine compartment more.

 

[toyolet2]

You could convert that fan into blowing out so it helps lower the pressure under the hood and helps with radiator cooling.

That's the direction it blows, out thru the fender louver. I think it will help significantly when it gets over 110 degree's here.

 

[Seth S]

That's the direction it blows, out thru the fender louver. I think it will help significantly when it gets over 110 degree's here.

if it’s still in stock wiring and design then it’s pulling air in from outside and blowing it on your intake manifold. To get it to blow air out you will need to find a reversed squirrel cage and reverse the power/ground to spin the motor the other way.

 

[tmxmotorsports]

Its not needed for your swapped 62. Factory it only comes on via temp sensor and the ignition switch turned off. You can ground rhe temp wire and it will come on once the ignition is turned off but it will come on every time the ignition is turned off has a built-in timer don't remember how long it will stay on for but it's really not needed and it blows air in not out might be able to mod it like @Seth S mentioned to blow out.
Tommy

 

[toyolet2]

Its not needed for your swapped 62. Factory it only comes on via temp sensor and the ignition switch turned off. You can ground rhe temp wire and it will come on once the ignition is turned off but it will come on every time the ignition is turned off has a built-in timer don't remember how long it will stay on for but it's really not needed and it blows air in not out might be able to mod it like @Seth S mentioned to blow out.
Tommy

I will play with it and see if the blower wheel can be removed and reinstalled backwards. Even if it blows into the compartment, the additional airflow will be welcome to help keep the 6.2 cooling correctly in the heat of the desert. Thanks for the input!

 

[bhsdriller]

Eh those engines do just fine in other vehicles without them. I'd remove it to clean up the engine bay.