Running Hot

Twister · 03-20-2010, 04:07 AM

Ok, so i have an 85 B2. It started to run hot about 2 months ago and i have been trying to fix the problem.

I have replaced the fan clutch, water pump, t-stat and all the belts with no results.

So do you think i should get a new rad?

And how hard is it to put the 4L one from the xpolder in my B2?

thanks

lil_Blue_Ford · 03-20-2010, 08:39 AM

Sure it doesn't have a cracked head? Or a coolant leak somewhere?

My choptop had a coolant leak from the heater core, but it was strangely leaking outside of the cab a the firewall, which made it a bit difficult to discover. I managed to crack a head in the process of going nuts looking for the leak.

Of course, if you have the 2.8, you probably haven't cracked a head.

If you have the 2.8L, I have no idea as to if the rad out of a 4.0L will fit fine or not. If it's a 2.9l motor, then the 4.0L rad is a drop-in swap, but you may have to change the lower water hose.

a 4.0l swap on a first gen BII is not exactly easy. I started one in my 88 a couple years ago and never finished because I ended up in wiring hell. I couldn't find the wiring diagrams I needed to finish it. Of course, if you're not opposed to swapping to a newer dash, it would be considerably easier, there would be very few wires to be spliced and all in areas where it's not hard to get the wiring info.

**adsm08** · 03-20-2010, 09:26 AM

How much coolant is in it?

Are you sure you aren't leaking?

What is the condition of the coolant?

If all coolant conditions are ok, when was the last time the carb was checked/adjusted?

A lean condition can cause the engine to run hot.

I know the 2.8 has an electronic feedback carb, but I'd guess it still has some sort of adjustment. I'd try to richen it up a bit.

Twister · 03-20-2010, 02:30 PM

Well i have the 2.8, and have no idea as to ho to check if i have a cracked head.

My lower rad hose was leaking like crazy but i fixed it awhile ago. On the out side that's the only leak i had. I dont seem to be losing any coolant.

With the carb thing, how can i tell if i am running lean or not, and if i am how do i adjust it?

I am running out of things to replace with the coolant system, about the only things i havent replaced are the heater core and the rad. I have flushed both of those fairly well in the past month.

I am stumped.

Robert_1967 · 03-21-2010, 12:27 AM

my guess would be a cracked head or bad head gasket.

look for water in the oil, and oil in the water, also if it blows bubbles when running and the rad cap is off.

Robert

**adsm08** · 03-21-2010, 11:31 AM

You can also pull plugs and look for one that looks steam-cleaned. If it's cracked and leaking into a cylinder it will steam clean the plugs when they fire off the fuel.

Twister · 03-21-2010, 03:36 PM

Quote:

Originally Posted by Robert_1967

my guess would be a cracked head or bad head gasket.

look for water in the oil, and oil in the water, also if it blows bubbles when running and the rad cap is off.

Robert

The rad will blow bubbles?

kimcrwbr1 · 03-21-2010, 04:06 PM

When you flushed the readiator did you back flush it disconnect both hoses plug the lower one and run the hose full blast if you have a long hose crimp it to get the most pressure you can also fill the radiator with easy off oven cleaner let it set a few minutes the flush it good do that both ways a couple of times probably better to take it out for that and be careful as you know it burns especially the eyes.

**adsm08** · 03-21-2010, 04:54 PM

Quote:

Originally Posted by Twister

The rad will blow bubbles?

when you take the cap off you will see little bubbles coming to the surface because a cracked head or gasket will allow gases from the cylinder into the cooling system and then they come out at the cap.

Robert_1967 · 03-21-2010, 05:04 PM

Quote:

Originally Posted by adsm08

when you take the cap off you will see little bubbles coming to the surface because a cracked head or gasket will allow gases from the cylinder into the cooling system and then they come out at the cap.

Thank you

Robert

Twister · 03-21-2010, 06:05 PM

Well i drove it till it hit the bottom of the R in Norm, i took the cap off and i did not see any bubbles. I gave it a little gas after i checked it with the cap off and still no bubbles.

Also what would cause your car to raise in temp in you turn the heat on. I was driving it and it hit the N in Norm, so i decided to kick the heat on and it went up faster.

**adsm08** · 03-21-2010, 06:09 PM

Suspension of the normal operation of the laws of physics?

03-20-2010, 04:07 AM	#1
Twister Member Join Date: Mar 2010 Location: Omaha, Ne Year: 1985, 1987 Make: Duh Model: Bronco II, Bronco II Engine: 2.8L, 2.9L Class: 4x4, 4X4 Used For: DD and occasional offroad Posts: 1,483 Rep Power: 11 iTrader: (1)	Running Hot Ok, so i have an 85 B2. It started to run hot about 2 months ago and i have been trying to fix the problem. I have replaced the fan clutch, water pump, t-stat and all the belts with no results. So do you think i should get a new rad? And how hard is it to put the 4L one from the xpolder in my B2? thanks
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03-20-2010, 02:30 PM	#4
Twister Member Join Date: Mar 2010 Location: Omaha, Ne Year: 1985, 1987 Make: Duh Model: Bronco II, Bronco II Engine: 2.8L, 2.9L Class: 4x4, 4X4 Used For: DD and occasional offroad Posts: 1,483 Rep Power: 11 iTrader: (1)	Well i have the 2.8, and have no idea as to ho to check if i have a cracked head. My lower rad hose was leaking like crazy but i fixed it awhile ago. On the out side that's the only leak i had. I dont seem to be losing any coolant. With the carb thing, how can i tell if i am running lean or not, and if i am how do i adjust it? I am running out of things to replace with the coolant system, about the only things i havent replaced are the heater core and the rad. I have flushed both of those fairly well in the past month. I am stumped.
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03-21-2010, 12:27 AM	#5
Robert_1967 Member Join Date: Nov 2009 Location: White Pine, TN Year: 1988/1989 Make: Ford Model: Ranger Supercab/BroncoII Engine: 302/2.9 Class: 2wd Street/4x4 street Used For: Soon to be hot rod/Daily Driver Posts: 1,564 Rep Power: 12 iTrader: (0)	my guess would be a cracked head or bad head gasket. look for water in the oil, and oil in the water, also if it blows bubbles when running and the rad cap is off. Robert __________________ All Truths are Known upon Death. If I can't work on my Ranger or BroncoII, I rather be fishing. If Facebook, MySpace, and Twitter were all destroyed, 90% of teens would go insane.
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03-21-2010, 04:06 PM	#8
kimcrwbr1 Member Join Date: Dec 2009 Location: maplevalley WA Year: 1983 Make: ford Model: ranger Engine: 2.8l Class: 2WD street Used For: DD tow boat Posts: 4,681 Rep Power: 20 iTrader: (0)	When you flushed the readiator did you back flush it disconnect both hoses plug the lower one and run the hose full blast if you have a long hose crimp it to get the most pressure you can also fill the radiator with easy off oven cleaner let it set a few minutes the flush it good do that both ways a couple of times probably better to take it out for that and be careful as you know it burns especially the eyes. __________________ it takes a nickle to go first class when it stops hurting it will feel alot better
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03-21-2010, 06:05 PM	#11
Twister Member Join Date: Mar 2010 Location: Omaha, Ne Year: 1985, 1987 Make: Duh Model: Bronco II, Bronco II Engine: 2.8L, 2.9L Class: 4x4, 4X4 Used For: DD and occasional offroad Posts: 1,483 Rep Power: 11 iTrader: (1)	Well i drove it till it hit the bottom of the R in Norm, i took the cap off and i did not see any bubbles. I gave it a little gas after i checked it with the cap off and still no bubbles. Also what would cause your car to raise in temp in you turn the heat on. I was driving it and it hit the N in Norm, so i decided to kick the heat on and it went up faster.
	Tweet

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