• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Overheating Mystery

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
Don't recall if Tomm1468 installed a new Radiator or if this is an old\original Radiator?
If it's old\original, inspect front side for RoadDebris, could be clogged up fins blocking air flow?
I did not get a new radiator, but that was one of the first things I did, just making sure everything was clean and able to flow unobstructed.
 


Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
You can waste a lot of time and money relying on the factory temp gauge. I would get a second opinion from a infrared thermometer like someone else mentioned. Just to make sure the gauge is not lying to you.
yeah, Thats going to be my next step of investigating if the new clutch fan does nothing.
 

alwaysFlOoReD

Forum Staff Member
Forum Moderator
TRS Banner 2012-2015
TRS 20th Anniversary
Joined
Apr 13, 2009
Messages
12,296
Reaction score
3,293
Points
113
Location
Calgary, Canada
Vehicle Year
'91, '80, '06
Make / Model
Ford, GMC,Dodge
Engine Size
4.0,4.0,5.7
Transmission
Manual
2WD / 4WD
4WD
I've taken apart a few old rads that were marginal at best. They flowed well but didnt cool all that great. Found the bottom third of the rad clogged with sediment, and that was after doing reverse flush and using aftermarket rad flush chemicals. Use the infrared to check the temp of the rad in several different spots. Or your hand after shutting off the engine.
 

19Walt93

Well-Known Member
Ford Technician
V8 Engine Swap
Joined
Nov 13, 2018
Messages
3,471
Reaction score
2,985
Points
113
Location
Canaan,NH
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
V8
Engine Size
351
Transmission
Automatic
2WD / 4WD
2WD
Total Drop
3"
Tire Size
235/55R16
My credo
If you don't have time to do it right will you have time to do it over?
If you decide to use flush chemicals, make sure you can get the block drains out so you can get rid of them afterwards.
 

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
alrighty Bois, a new clutch fan came, and it its a bit quieter than the other so that one might have had issues, but all in all, still getting too hot. it likes to heat up a little and sit for about 5 mins, then heat up more and sit at one spot for about 5 min, and it will do this over and over as it creeps us the temp gauge.

One of the first things I did with the truck when I bought it is to buy a bunch of radiator flush chemicals, and flushed it out about 7 times until the water was coming out clear, then added in nice coolant, however the last time I took the engine apart, I drained all the coolant that would come out of the hole at the bottom of the radiator, I let it drain for probably an hour, then I turned my engine over and let it run for a second in an attempt to get all the coolant out then let it sit for probably another 3 or so hours, all in all, only about a gallon came out (though it takes just about 2. and when I went to add more in, it only took about a gallon in, even when I turned the engine over and let it burp out, only about a gallon. so maybe there is a huge blockage. at the bottom.
 

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
thermal theromoeter is in the mail.
 

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic

franklin2

Well-Known Member
Joined
Dec 24, 2019
Messages
2,025
Reaction score
755
Points
113
Location
Virginia
Vehicle Year
1984
Make / Model
Bronco II
Transmission
Manual
That picture above means nothing. Waiting to see what the thermal thermometer says. I haven't heard any stories about the radiator or the overflow bottle spewing over, no knocking from the engine, no burning oil smell, not down on power, no other signs of overheating except that gauge correct?
 

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
That picture above means nothing. Waiting to see what the thermal thermometer says. I haven't heard any stories about the radiator or the overflow bottle spewing over, no knocking from the engine, no burning oil smell, not down on power, no other signs of overheating except that gauge correct?
yeah, you're right. and TBH when engines overheat you can generally feel it really just radiating heat, beside the fact that it's spewing coolant. My engine doesn't feel that hot, when it says it's this hot, and no spewing. but if it is a wiring problem, I'm wondering why just now it's having this problem since it was fine before I did the rebuild.
 

RobbieD

Well-Known Member
Joined
Aug 6, 2007
Messages
2,480
Reaction score
1,038
Points
113
Location
Georgia
Vehicle Year
1984,1990,1994
Make / Model
Ford
Transmission
Manual
2WD / 4WD
2WD
My credo
Toonces drives a Ranger . . . . just not very well.
Long shot, but I'll throw it out just in case. I don't know on your '95, but assuming your gauge temp sending unit (noted as new Motorcraft) is a single-wire type, did you put a bunch of teflon tape on the threads to "seal it up good"? In other words, make sure that the sending unit is properly grounded to the engine. If it has to be taped, you should always leave some bare threads to ensure a good ground bond.
 

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
Long shot, but I'll throw it out just in case. I don't know on your '95, but assuming your gauge temp sending unit (noted as new Motorcraft) is a single-wire type, did you put a bunch of teflon tape on the threads to "seal it up good"? In other words, make sure that the sending unit is properly grounded to the engine. If it has to be taped, you should always leave some bare threads to ensure a good ground bond.
Hey, thanks for the thought. Unfortunately, it is not a single wire type, the sender unit is, but the actual coolant temp sensor that reads to my gauge cluster is double wired and has a clip to hold it in place.
 

bobbywalter

TRS Technical Staff
V8 Engine Swap
TRS Technical Advisor
TRS Banner 2012-2015
TRS 20th Anniversary
TRS Event Participant
Joined
Aug 9, 2007
Messages
22,305
Reaction score
2,837
Points
113
Location
woodhaven mi
Vehicle Year
1988
Make / Model
FORD mostly
Engine Type
V8
Engine Size
BIGGER
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
sawzall?
Tire Size
33-44
My credo
it is easier to fix and understand than "her"
Carefully check block with temp gun..as it may be sludged...need to actually drain it......and get a real gauge for testing purposes. A real gauge should have been the first thing bought...just as a temporary check...as it would have been an investment since you did not already have one to pop on for a look.

May have the head gaskets on wrong(not sure what brand used)...or like mentioned, pump running backwards....though...she would likely blow some steam in those scenarios.

There is a proper way to install a temp sending unit....
 

RobbieD

Well-Known Member
Joined
Aug 6, 2007
Messages
2,480
Reaction score
1,038
Points
113
Location
Georgia
Vehicle Year
1984,1990,1994
Make / Model
Ford
Transmission
Manual
2WD / 4WD
2WD
My credo
Toonces drives a Ranger . . . . just not very well.
Hey, thanks for the thought. Unfortunately, it is not a single wire type, the sender unit is, but the actual coolant temp sensor that reads to my gauge cluster is double wired and has a clip to hold it in place.
OK, I'm used to the older stuff (OBD1), which uses a single-wire sending unit to the gauge, and a two-wire sensor to the PCM. Don't give up; you will figure it out, and good luck!
 

Tomm1468

Member
Joined
Apr 22, 2021
Messages
37
Reaction score
12
Points
8
Location
Olympia
Vehicle Year
1995
Make / Model
Ranger XLT
Transmission
Automatic
OK, I'm used to the older stuff (OBD1), which uses a single-wire sending unit to the gauge, and a two-wire sensor to the PCM. Don't give up; you will figure it out, and good luck!
went out and looked at it, and im an idiot. i was mixing the sender and the ect. soooo yes it is a single wire that sends signal to my guages, but its tight down, really tight since its also new.
 

RonD

Well-Known Member
Joined
Jun 2, 2012
Messages
22,384
Reaction score
5,564
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
After it cools down remove rad cap, if there is any air in the rad then you have a problem with head gasket or a leak in the engine side of the system

The overflow type systems lets hot coolant flow OUT and over to the overflow tank when engine is warm
Happens every time you drive longer than say 20min at a time, that's what the COLD and HOT lines on the tank at for
Then after key off as the engine cools down the coolant is SUCKED back in from the overflow tank
So after engine is cold rad should be topped up completely, NO AIR at all

Any air in the engine side of the system will collect at the top of radiator and be PURGED out as engine warms up
This is why the hose from rad to overflow tank comes in at the BOTTOM of the overflow tank
Any air that comes out will bubble up to the top of the tank and be purged
When engine cools down only coolant would be sucked back in

If there is air at the top of rad after cool down then there can be a few things wrong
A leak in the engine side will allow AIR to be sucked back in as engine cools down, sucking in air is way easier than sucking in coolant from the tank

A leak in the overflow hose, it will allow air to be sucked back in

A head or head gasket issue, it pumps in "air" which pushes out too much coolant, so overflow tank gets too full
And it holds a higher pressure so coolant can't be SUCKED back in on cool down
 

Sponsored Ad


Sponsored Ad

Top