Does my 78 2F have a clutch fan?

[flaa1a]

I have changed and checked the thermostat brand new.
I have flushed the radiator/block.
I have bought a brand new OEM Toyota radiator cap.
The PO claims to have changed the waterpump (3 years old).

I am getting ready to pull my hair out because none of these things are making my 55 run any cooler. Boiling so hot today it blew the top off the overflow bottle.....

As a matter of fact it overheated on the way home from having the radiator/engine block flushed.....

I am going to loosen the belt and check the water pump bearings (per another post here on MUD) and is that when I check the cluth fan? Does my 78 2F even have a clutch fan?

Thanks in advance for the info

 

[kurtnkegger]

You have a plastic fan, it's mounted to a viscous clutch. Get a few sheets of newspaper or a small magazine, roll it up, and while the engine is running, slowly put roll of paper in the fan. If ot stops, your clutch is faulty. If it still bounces the paper back, it's turning fine. Google the test or look in you tube, there are videos on the web on this test.

 

[flaa1a]

Thanks a million for the fast respose!!

Randy

 

[kurtnkegger]

Forgot to add, the engine needs to be warm for this test. That's when the clutch is engaged...

 

[Bigcity25]

Are you sure the fluid is flowing correctly through your block? My 2f had to have it's block flushed with some chemical additive 2 times at the shop. It was doing exactly what yours sounds like it was doing. The shop I took it to had to check temps all over the radiator and it wasn't cooling between the top and bottom. And to add more headache, the scale and crap that was flushed out had ruined my radiator. I don't know what they used but I guess it sat in the block over night and broke down the crud. But you might have too much coolant in the block now and it over filled the reservoir. If your fan is spinning it doesn't matter if you have a clutch or not. Air being sucked through the radiator should cool things down. Did you flush it? Did you burp the system? Air pockets can stop flowing coolant.

 

[Mark W]

Since the pic in your avatar is a Pig, it is worth mentioning...

I will not speak as to all '55s, but the four '78 and '79 FJ55s that I had around here did not have clutch fans. Just old scholl fixed plastic.

The clearance is a bit tighter in the '55s than the '40s.


But... instead of asking if you have a clutch fan... pop the hood and look.


Mark...

 

[nuclearlemon]

if you're not sure what a fan clutch is, this is not a pig, but example of a fan clutch from my spare 1fz motor. it's the finned section you can see behind the fan blade

 

[flaa1a]

Since the pic in your avatar is a Pig, it is worth mentioning...

I will not speak as to all '55s, but the four '78 and '79 FJ55s that I had around here did not have clutch fans. Just old scholl fixed plastic.

The clearance is a bit tighter in the '55s than the '40s.


But... instead of asking if you have a clutch fan... pop the hood and look.


Mark...

It is in a 55 but not sure where the engine came from as it is a transplant.......and.....Yeah....thats the thing. I don't know what a clutch fan looks like...except now that I have seen the pic offered up by nuclearleamon. Will test and get back....Thanks guys.

 

[flaa1a]

Are you sure the fluid is flowing correctly through your block? My 2f had to have it's block flushed with some chemical additive 2 times at the shop. It was doing exactly what yours sounds like it was doing. The shop I took it to had to check temps all over the radiator and it wasn't cooling between the top and bottom. And to add more headache, the scale and **** that was flushed out had ruined my radiator. I don't know what they used but I guess it sat in the block over night and broke down the crud. But you might have too much coolant in the block now and it over filled the reservoir. If your fan is spinning it doesn't matter if you have a clutch or not. Air being sucked through the radiator should cool things down. Did you flush it? Did you burp the system? Air pockets can stop flowing coolant.

I took it to a place here in town. They claimed to have flushed the block and radiator and it looked good. I drove it home (about 6 miles) at 55-60 MPH.....it started to get hot and really got to boiling. I could see steam coming out and by the time I got home it was boiling furiously.

The overflow bottle lid had blown off and I am sure it spewed antifreeze everywhere. After it cooled off, I poured over a gallon of antifreeze in it!

I am only into this a couple of years and the way I see it, only a few things can affect the pig running hot. There is really NO one around here that works on them. The dealership wont touch it and I am just wanting to figure out what is causing the overheating....the not knowing is the frustrating thing....ya know?!

 

[Bigcity25]

Even though I own a 40 and not a 55 I feel your frustration. The shop I took mine to is a cruiser shop for a grocery list of items and felt like I got bent over. Maybe try a radiator shop. The fan even with a clutch spins. When the clutches works it spins like 30% less rpms. This is me assuming that its an fluid clutch and not a electric setup. My guess something's clogged up inside. Is your temp gauge responding to the overheating? Or is it "normal"?

 

[flaa1a]

Even though I own a 40 and not a 55 I feel your frustration. The shop I took mine to is a cruiser shop for a grocery list of items and felt like I got bent over. Maybe try a radiator shop. The fan even with a clutch spins. When the clutches works it spins like 30% less rpms. This is me assuming that its an fluid clutch and not a electric setup. My guess something's clogged up inside. Is your temp gauge responding to the overheating? Or is it "normal"?

No the guage is reading borderline hot. I just went to WalMart two miles up the road , bought another gallon of anti freeze and poured in another half gallon. There are no visible puddles under the pig.....by the timeI drove home it was hot again. This time driving 35-40 MPH.

There is no antifreeze in the oil (I just changed the oil pan gasket-an adventure in itself) and again there doesnt seem to be any oil in the antifreeze. I am not ruling out Head gasket as I have read in some threads here.....I just dont want to chase it only to find out that is not what it is.....

I dont think mine has a clutch fan. It does not look like the picture that Ige put on.....furhter more and just in case that dude chewed up a magazine with no problemo.....so rule out the clutch fan idea....

On a side note...it was not boiling this time. The upper radiator hose is rock hard.....does that mean the thermostat did not open?

Randy

 

[Bigcity25]

I know you can get a pressure test kit for your cooling system. It will pressurize the radiator and block and if it drops over a certain time period you may have a bad head gasket. But if the temp gauge is reading barely hot it's either gone bad or fluid isn't circulating correctly or not at all. That's my guess.

 

[Fast Eddy]

No the guage is reading borderline hot. I just went to WalMart two miles up the road , bought another gallon of anti freeze and poured in another half gallon. There are no visible puddles under the pig.....by the timeI drove home it was hot again. This time driving 35-40 MPH.

On a side note...it was not boiling this time. The upper radiator hose is rock hard.....does that mean the thermostat did not open?

You clearly need to take the thermostat out and either run without it as a test, or boil it in a pot of water as a test.

 

[shelfboy1]

if you have a non clutch plastic fan its easy to put it on backwards and the motor will overheat.good luck

 

[dx379]

if you have a non clutch plastic fan its easy to put it on backwards and the motor will overheat.good luck

This man speaks the truth

 

[flaa1a]

Backwards?

if you have a non clutch plastic fan its easy to put it on backwards and the motor will overheat.good luck

After reading this I was excited, because I would not put that past a guy like me.....but I think it is on correctly!?

 

[flaa1a]

Yeah....I took it out and broke out the candy thermometer and it followed the specs of the FSM....started opening at 190 and fully open at 210.....if I remember right.

 

[Pighead]

It's really hard to fit a fanclutch in front of a 2F in a Pig. Toyota only did it in '78 when they put a 2-row radiator in the 55.
Pigs with 2Fs just do not run hot unless something is really wrong. If the waterpump is not leaking out the weephole, it's probably ok. Run your pig without the thermostat, see if that helps. I might pull the radiator and either give it a muriatic acid soak or have it rodded at the radiator shop. Check the big radiator hoses too, I have heard of them disintegrating on the inside and blocking flow.
But if you're blowing off the top of the overflow bottle, I'd do a compression test to rule out the head gasket...

 

[edwjmcgrath]

Run a compression test and a borrow a coolant pressure tester from your parts store.
I think it'll show that you've got a blown head gasket.

 

[flaa1a]

I hope not dude....but if so than it is what it is.....I have done a compression test and all were firing 130....that was about two years ago and I prolly have put less than 1K miles on it since then!