Over heating ???

[1v6pony]

My rig is a buggy style samurai with a 3.0 V motor.

I have aftermarket temp guage and sensor (equis) the temp when running after 5 min , says it is like 230-240 deg. does not go up from thier.
does not blow the cap and does not seam to send coolant out the overflow tube.
Also I am running a raditor from a Cj-7.


Does this temp sound right?
also I do not have a overflow tank, just a tube running out. could this be the trouble.

any other thoughts?
Thanks

 

[TomB1269]

Is there any point in the system that the radiator is below, ie the fill cap is not the highest point? These engines like to run hot if there is an air pocket in the coolant system.

 

[1v6pony]

Now that I think of it the tube from the thermostat to the radiator is above the fill cap somewhat, Could this be the cause

 

[1v6pony]

Now that I think of it the tube from the thermostat to the radiator is above the fill cap somewhat, Could this be the cause

Ok I did some googling and found a inline radiator cap, it goes into the hose and creats a new fil point....

Maybe I will try this and see if it works.

 

[oachs83]

Is the 3.0 out of a car or truck and is the motor turned different from it's original vehicle position? Is this a new problem or have you just put this engine in?

 

[evanesce69]

i would think it to be normal... the pressure in the system increases the boiling point of water. This pressure is caused by the heat of the engine and the funtion of the radiator cap.

The boiling point of water is also increased by the addition of antifreeze.

as a side point, the efficiency of an internal combustion engine increases with temperature. the warmer you can run an engine, the more efficient it will be. This has certain limitations being most notably the dreaded spark knock and secondly being the breakdown temperature of the lubricant you use.

if you can run this temp and not have any problems... I'd say

why fix it if it ain't broken???





Rob

 

[1v6pony]

Is the 3.0 out of a car or truck and is the motor turned different from it's original vehicle position? Is this a new problem or have you just put this engine in?

It is out of a Ranger, Do not know what you mean by turned from it orig postion?. Oh I get it like a side mounted engine

The trouble has been since I built it, I am concerned as this is a rock crawler daily driver and did not want to kill the motor from to much heat.

 

[1v6pony]

What do your temps on your 3.0 look like??

 

[Big Jim M]

My rig is a buggy style samurai with a 3.0 V motor.

I have aftermarket temp guage and sensor (equis) the temp when running after 5 min , says it is like 230-240 deg. does not go up from thier.
does not blow the cap and does not seam to send coolant out the overflow tube.
Also I am running a raditor from a Cj-7.


Does this temp sound right?
also I do not have a overflow tank, just a tube running out. could this be the trouble.

any other thoughts?
Thanks

First the coolant tank.. It is NOT an overflow tank! As the coolant in the engine gets to temperature it expands pushing coolant into the tank.. Then when it cools back down the temp creates a vacuume.. If you have a coolant tank properly installed the coolant is sucked back into the engine..
If you do NOT have a coolant tank the vac pulls AIR into the engine.. This air could be your problem with the temperature..
BUT the main reason for the tank is to assure there is no air in there.. The air helps RUST to grow. The rust will grind away the pump seals..
So in short by all means install a good coolant tank.

Then the temp gauge.. Is the one you are using a lecrtic one? If so I'd get me another one just like it and change out the sendor to see if it is sending the truth to the gauge. Then you can take one of them back in the second package..
Big JIm

 

[1v6pony]

Cool Thanks,
for an afermarket tank does the inlet need to be at the bottom of the tank for it work???

 

[evanesce69]

yeah, i hadn't thought about the puke tank. that is a valid idea.

you would always want the intake near the bottom, but not on the bottom. that way it can still pick up coolant, but not pick up any crud that may accumulate in the bottom of the tank.

I just flushed the cooling system twice on my '93 3.0L and noticed that the intake for the overflow is VERY close to the bottom of the reserve tank. i put the hose in the fill cap and disconnected the siphon line from the inlet of the radiator and let fluid flow out. I then removed the "garden" hose and let it siphon the crud out. i used a bottle brush to clean the inside of the reserve tank. i am satisfied that the cooling system is clean.

still, what i said earlier is correct.... about temp and efficiency.




Rob

 

[1v6pony]

Ok I know what I will do.
I am going to take a 2 quart watter container that was used for my cats auto water thing that never worked... It looks just like the ones from sparklets . run a tube with and o-ring . run the tube in from the top to near the bottom kind of like a paint ball co2 container....
That should work....

 

[1v6pony]

OK I think I know what is wrong, Could some tell me the orintation of thier fan.
Pic this, If you look at the blade from the top, It is facing south west and northeast or is is northwest and south east ( the tips of the blade)

I think they gave me the wrong blade when I ordered it. Mine is facing Northwest and southeast...

I got the inline radiator cap, no difference....Sigh

 

[cbxer55]

Sounds like your fan is backwards. The fan turns counter-clockwise, when viewed from behind. Therefore the blades would face southwest. If, as you say, your blades are facing northwest, you have a fan trying to push air through the radiator from behind, while airflow is trying to push it from in front. Stagnation. Zero airflow through the radiator.

Also the curvature of the blades makes them efficient pulling air from in front. It would be very inefficient trying to push air through the front.

I would not be happy at all with the temperatures you mention. The stock thermostat keeps temps around 195. I myself run a 180 with no problems. My stock temp. gauge never goes more that about 1/8 to 3/16 inch above the "C" mark, even in the summer with the ac on. It has never seen the halfway point in over 100,000 miles of driving.

Get the proper fan ASAP.

 

[1v6pony]

Are you sure it is supposed to run counter clock wise??? this is a 1995

It is curently running clockwise looking from the front of the engine. The book I do not think is correct as it does not show the tension pulley witch changes the direction from counter to clockwise....

Am I looking at this wrong?????