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how can i make my engine run cooler?


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I replaced my stock 195 with a 180 and that worked great, as said earlier going any low is waste and doesnt assist as one would think.

 

I really like the Stant Heavy Duty 180 Stat .... its $10ish I think and works well, they make a 160, but it stays open too much and doesnt allow the coolant to "get a rest" before going back into the beast.

 

The other thing that could be done is Flow Kooler water pump.

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I fear your problem is why XJ/MJ's don't make the best plow rigs..... With out redesigning the whole system, its just the way it is.....

 

Its part of my problem as well. Now, I don't have the plow, but I do have a winch that partially blocks the radiator.

 

You say you have a good/new radiator. Is it a 2 or 3 row?

 

How is the fluid? Is it new or no older then last years? How about the mix ratio? 50/50 is about the best balance.

 

A Hi flow, pump, T-Stat and water neck will help. Forget about a stat that opens colder then 180, even that's effects are minimal.

 

How is the Heater core? How about the clutch fan? Oh yea, get a fan shroud!! Its important!!

 

Even with everything working perfectly, if you block the radiator and make the motor work harder, you will have heat build up while restricting the radiators ability to cool it off.

 

CW

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yes, the fan shroud is more there to direct airflow, without it the fan is able to just blow air around instead of being forced to draw it through the radiator.

 

i agree with CW, nature of the beast. things to make sure of

 

-the new radiator if its 2-core and plastic tanks (you want a 3-core all aluminum piece 1800-radiator has them at a good price)

- high flow water pump, thermostat, and housing (one without the others is useless.)

- water wetter will help too.

-hood vents will relieve some of the trapped hot-air but idk if it will actually cause a reduction in engine temperature.

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Upgrade the stock clutch fan, a 97-98 zj with the 4.0 and W/O max cooling option has a heavy duty clutch that is a direct bolt on replacement. NAPA part #272310, The standard duty clutch spins 60-70% of shaft speed. The HD spins 70-90% of shaft speed. did it on mine and went from almost going in the red in the summer going up hills to 'never' getting above 215. Makes it kinda sound like a V8 also lol.

 

the problem with going to a high flow pump is it moves the water to fast and doesn't let it exchange the heat out in the rad. thats why gojeep had to add a flow restrictor to get a stable temp. just my 2 cents though.

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i just noticed there is a 2" piece coming from my airbox going into the engine

mines gone

is that important, and wots it dooooooooooooooooooooooooooooooooooo?

 

 

 

I think you are asking about the preheat hose. it should come from a shroud around your exhaust to your air box. the idea of it is to warm the engine up faster in winter time by puting warm air in the intake.

 

for those of us down here in the South and have know idea what a snow plow is and why you want it on the front of your MJ have long ago pulled it out of our MJ/XJ

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I know this sound kind of K.I.S.S..........

 

But, an easy way to keep your truck from overheating........

 

 

 

 

Take the Plow off when you don't need it :roll:

 

I take mine off all the time, we don't get snow forecast for a while, the plow comes off.

 

It takes me less than 5 minutes to pull 3 pins, and the electrical connection, and less than 10 minutes to but it back on.

 

Yea, I know, you have the Myers plow, so you have 2 pins, a chain, and 2 quick connects to undo :shake:

 

Plus, you'll see a great improvement in your MPG's after you take the plow off going down the highway at 60 :yes:

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I used to run a Meyers plow on my old full-size Cherokee with the 360 V8. I had the same problem. It's pretty fundamental -- engine cooling requires air flow through the radiator, and putting a solid object in front of the radiator doesn't enhance the air flow. I never found a true solution that would allow me to drive around with the plow on as if it weren't there. The only things that helped were keeping the plow as low to the ground as possible when driving, and driving slower. I sold that rig more than 10 years ago so I'm digging deep into the dustbin of memory, but IIRC the critical speed was around 40 MPH. As long as I kept the speed under 40 MPH the temperature stayed under control. Once I went over 40, it overheated. Period, end of discussion.

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I know this sound kind of K.I.S.S..........

 

But, an easy way to keep your truck from overheating........

 

 

 

 

Take the Plow off when you don't need it :roll:

 

I take mine off all the time, we don't get snow forecast for a while, the plow comes off.

 

It takes me less than 5 minutes to pull 3 pins, and the electrical connection, and less than 10 minutes to but it back on.

 

Yea, I know, you have the Myers plow, so you have 2 pins, a chain, and 2 quick connects to undo :shake:

 

Plus, you'll see a great improvement in your MPG's after you take the plow off going down the highway at 60 :yes:

i only put the plow on when i have to plow...otherwise it sits in my garage....believe me, i hate driving it aroung with the plow....it seems like its stressing all the new parts i just put on more than usual....and I'm sure it is.

thanks man!

oh yeah...next time i will try to keep it under 40 jamminz.gif

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