what's the point of having one and what's gonna happen if I take it off?
Any thoughts?
Any thoughts?
Carb fan on FJ62...?
- Thread starter John E
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Hot starts. Let's say you drive some place, your engine is up to operating temperature. You go in for 5, 10, 20 minutes and come back out and go to fire it up it will have difficulty doing so. An engines temp rises some after it is shut off. It was explained to me that the fuel in the carb evaporates due to the heat, making a hot start difficult.
Why would you want to remove it?
Why would you want to remove it?
There should not be a carb fan on a 62 unless a 2F or the 3F (non-efi) engine is there. Carb fan is installed to help with vapor lock on CARBURATED engines. This helps circulate air in the hot engine bay, thus pulling gasoline vapor from the carb so that vapor lock does not happen.
Good detective work Greg, I didn't even notice the thread title stated 62. 
Good detective work Greg, I didn't even notice the thread title stated 62.
I am sure to read thoroughly after you chastised me for calling BeBe a "car".... She is a truck, or a rig... but never a CAR!!
They are also on the 3FE 80s.
Yup... 3F is a different engine than the 3F-E.
They are in place on 62s as well. I pulled mine out since it really is just meant to prevent vapor lock on carbed engines after they've had heat soak. I do still have mine and might reinstall it in the future if I put louvers on my hood, since it'll help evacuate the hot air when the engines just sits there after driving. My thought is it'll help a bit with the longevity of any electronics in the engine compartment by getting hot air out of there a little quicker.
You can get heat- soak related failures on an EFI engine, too,
especially a non- crossflow motor like the 2F/3FE-
fuel vaporization isn't such a big deal, as it SHOULD stay under pressure,
but the injectors can overheat and bind, the hoses and wires get the stuffing cooked
out of them, etc.
Nissan used fans on their 6- cylinder non- crossflow EFI engines, too.
t
<edit- Spook, you said that, didn't you? Me read good!>
especially a non- crossflow motor like the 2F/3FE-
fuel vaporization isn't such a big deal, as it SHOULD stay under pressure,
but the injectors can overheat and bind, the hoses and wires get the stuffing cooked
out of them, etc.
Nissan used fans on their 6- cylinder non- crossflow EFI engines, too.
t
<edit- Spook, you said that, didn't you? Me read good!>
I was curious to see if it was covered in the 91 wiring diagram.
As mentioned above, it's for cooling the engine compartment. Comes on when the exhaust manifold is more than 180F.
I kind of like mine. Reminds me of how robust these trucks are. Pre-equipped for global warming
As mentioned above, it's for cooling the engine compartment. Comes on when the exhaust manifold is more than 180F.
I kind of like mine. Reminds me of how robust these trucks are. Pre-equipped for global warming
Not exactly that, but your points are pretty much dead on. I just wonder if Toyota had that in mind when they left the carb cooling fan in place in the 62 and 80 series. That's exactly why I still kept mine
It blows air over the intake/exhaust manifold area to stop the injectors/fuel rail from getting too hot when you turn the engine off and there is no air-flow.
As mentioned, lots of non-cross flow I6 engines used them. Like the Ford 4.9L I6. Ford later dropped the fan and went to a much higher fuel pressure to combat fuel boiling.
As mentioned, lots of non-cross flow I6 engines used them. Like the Ford 4.9L I6. Ford later dropped the fan and went to a much higher fuel pressure to combat fuel boiling.
Thanks. After recently purchasing an '89 FJ62 I was wondering why my 3FE had a carb fan in the engine compartment. Wasn't going to get rid of it since I think more cooling is better on an engine that seems to really like to generate heat, but it did make me wonder WTF it was there.
Does anyone know how to test manifold fan on a 62? I have only owned my for about a month and it's not summer yet. I haven't heard it come on but that doesn't mean anything really...
any ideas?
any ideas?
Mine too!!!
After reading this post and others, I disconnected mine about 10 minutes ago and looked and looked and looked but I can't seem to locate any bad wiring or anything that leads to the fan. I still have factory tape/tubing hiding all the wires and only the connectors peak through so I can't see where it leads (I even discovered a couple connectors with nothing to connect them to). All the fuses are good and the interior blades rotate just fine and there's very little dust.
Regardless, I'd like to get this thing working.
Any suggestions....???
Regards,
James
After reading this post and others, I disconnected mine about 10 minutes ago and looked and looked and looked but I can't seem to locate any bad wiring or anything that leads to the fan. I still have factory tape/tubing hiding all the wires and only the connectors peak through so I can't see where it leads (I even discovered a couple connectors with nothing to connect them to). All the fuses are good and the interior blades rotate just fine and there's very little dust.
Regardless, I'd like to get this thing working.
Any suggestions....???
Regards,
James
My 89 has one. I am just guessing but Toyota probably put it there for a reason, and I have no idea why someone would remove it because someone on the internet said it isn't needed.
usually the heat switch is bad or not working. the switch located under the manifold by the 4th/5th cylinders is a grounding switch, so when it activates, it closes the ground side circuit and the fan operates off the timed relay. You can try by passing the switch and run the wire directly to ground. It will then operate for 30 minutes everytime the key is turned off.
Hmmmm....
...I'll have to try looking into this!!!
I cleaned the fan and reinstalled it last night then drove it around while running errands and alas....nothing. This part of Seattle has been quite nice as of late and I can't see it coming on because of heat outside and thus cooling off a warm engine.
It should come on regardless of temp and should help flush the compartment of fumes no matter what the outside temp.??
I'll have a friend look at it when he can....I'll post here any findings. Maybe he can figure this out and thus help others in this discussion.
Thanks again for the replies. I learn more and more every time I visit!!!
James
...I'll have to try looking into this!!!
I cleaned the fan and reinstalled it last night then drove it around while running errands and alas....nothing. This part of Seattle has been quite nice as of late and I can't see it coming on because of heat outside and thus cooling off a warm engine.
It should come on regardless of temp and should help flush the compartment of fumes no matter what the outside temp.??
I'll have a friend look at it when he can....I'll post here any findings. Maybe he can figure this out and thus help others in this discussion.
Thanks again for the replies. I learn more and more every time I visit!!!
James