Help...My 3FE engine with Automatic Tranny is very hot (1 Viewer)

[sailfish014]

Help...My 3FE engine with Automatic Tranny is very hot... Although it is not overheating. Is yours this hot? I don't know the temperature of the engine, but the heat vibrates through the flooring of the cab. I have a rubber insulator in the flooring, carpet, and a matting...but even with the thick rubber soles of my shoes, I can feel the heat transferring on my feet. Is yours like this as well? My two friends' LC80 running on 1HZ engine do not have this problem. Does anyone with a 3FE engine and an automatic transmission have the same experience and has anyone done anything to solve this problem?

Thanks!

 

[Alleycats]

So whats the actual temp. of the ATF when you experience this problem?

 

[jwilber]

I believe all 3fe models are like this unless you change your exhaust. Your dual cats are right under your feet just cooking away. You might want to install some sort if heat shield

 

[Michael Hanson]

We have several ,they don't get that hot . Are the cat shields still in place? Mike

 

[WarWagon]

I hardly notice any heat, but I also have my cats removed.

 

[Golgo13]

The FZJ80 guys don't have this problem because their exhaust is on the other side.
Check the fire-wall from inside the vehicle where the steering intermediate shaft (shaft from the column to the steering box)goes through to the engine compartment. You very likely need a new I-Shaft Boot.
Check it out: https://forum.ih8mud.com/threads/hot-drivers-feet-this-may-be-your-fix.476570/
LandCruiserPhil put together a great thread for the fix.

 

[Motleyone]

My 3FE does get hot especially here in AZ. I got rid of the two cats and went with one Magnaflow. It did help a little. As long as your temp is not showing hot you are probably fine. The heat from the manifold and exhaust system is part of the reason you will smoke your EFI relay on really hot days. I always carry a spare. I was going to do the EFI relocation but it has only happen to me once in two years. I'm going to look at a larger transmission cooler when I get the current slipping situation resolved. I have also been looking into hood louvers to help vent some heat. Summit racing sells some exhaust wrap for header and pipes. Not sure if it would help.

 

[Aggiesdm]

You may also check the rubber "seal" that goes around your steering column as it passes thru the firewall. Many times it's been destroyed and leaves a gaping hole for heat to enter the cab. My legs used to get really hot until I replaced it and it's been fine since. It's a $12 part from Toyota and took 10 mins to install. Just a thought....

 

[sailfish014]

Thanks everyone for the comments! This indeed is one great forum!
@Alleycats, i don't know the actual temp...but i am installing a temp gauge next weekend...
I guess i need to get that boot / rubber seal replaced and check for a heatshield on the cats then... And when you say cats, you meant catalytic converter, right? Or better yet, remove it...

 

[sailfish014]

Im planning an 800-km trip april 16-20... That's already Back and forth.. Im still having second thoughts if my engine/tranny can make it with the heat... Although i had the tranny checked and the mechanic said my atf is still good... Although i don't have a peace of mind yet.. Hehe...

 

[Copenhagen1]

I agree with all of the suggestions above for trying to keep the heat out of the cabin.
But it sounds to me like you really don't have any idea how hot your motor and tranny are running. You said you are going to install a temp gauge, but in the mean time, go purchase a $40 infrared thermometer.

I use mine for everything. I shoot my front wheel bearing and brake rotors when I get done driving, looking for big discrepancies from side to side. I shoot my u-joints. I shoot my pinions. I shoot my heater hoses, my thermostat housing, the pulley bearings on front of the motor. Excessive heat = excessive friction. Excessive heat means trouble spot.

 

[sailfish014]

Great idea, Copenhagen1! Thank you..

I agree with all of the suggestions above for trying to keep the heat out of the cabin.
But it sounds to me like you really don't have any idea how hot your motor and tranny are running. You said you are going to install a temp gauge, but in the mean time, go purchase a $40 infrared thermometer.

I use mine for everything. I shoot my front wheel bearing and brake rotors when I get done driving, looking for big discrepancies from side to side. I shoot my u-joints. I shoot my pinions. I shoot my heater hoses, my thermostat housing, the pulley bearings on front of the motor. Excessive heat = excessive friction. Excessive heat means trouble spot.

 

[sailfish014]

Copenhagen1, infrared thermometer is not widely available from where I am... Anyway, I already had the temp gauge installed. I drove around 17 Kilometers (11 miles) this morning..it took me 41 minutes with light to moderate traffic and the temperature shown in my ATF Temp gauge is about 185 Fahrenheit...is this normal?

I'm worried for the following reasons:
1) With this short distance I travelled, my ATF temp is that high... is this normal?
2) Will it still go up if I go longer distance?

I'm having an approximately 1,000-kilometer road trip this Wednesday and I don't know if I could make it without my tranny overheating...

TIA...

 

[itbrokeagain]

Whenever I drive my 80 on a long trip the trans tunnel always gets hot. I think its just the way it is

 

[KoalaCruiser]

Is the trans running the appropriate amount of atf? My 80 is always hot even after new lines, trans rebuild, new coolant and new atf. Bumper to bumper traffic makes it seem worse. Is your trans cooler free of debris?


...via IH8MUD app

 

[sailfish014]

I had it checked in an Auto Tranny shop and the mechanic said the fluid is still good... and is in the right amount... I hope this is normal and can survive the long distance travel I am planning... Thanks!!

Is the trans running the appropriate amount of atf? My 80 is always hot even after new lines, trans rebuild, new coolant and new atf. Bumper to bumper traffic makes it seem worse. Is your trans cooler free of debris?


...via IH8MUD app

 

[mattafact]

Look up GCRad's build thread. He added a roll on liquid sound and heat deadener and seems to like the results.

 

[sailfish014]

Thanks mate!

 

[sailfish014]

When you had your cats removed, you replaced them with straight pipe? No Check Engine error? How did the O2 sensor manage?

So whats the actual temp. of the ATF when you experience this problem?

I hardly notice any heat, but I also have my cats removed.

 

[sailfish014]

yes it is free of debris... some gunk came out when it was blown with compressed air... still very hot... my ATF play somewhere around 90 and gets to around 115 degrees celsius when stuck in traffic..

I had it checked in an Auto Tranny shop and the mechanic said the fluid is still good... and is in the right amount... I hope this is normal and can survive the long distance travel I am planning... Thanks!!