Overheating - Page 5 - JeepForum.com

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post #61 of 70 Old 09-20-2013, 05:06 AM
Rproject
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1987 YJ Wrangler 
 
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I was thinking about this thread last night. Thinking about the basics. What do we know? We know several components have been replaced. We know there is good flow. We know the temps are 230+.

IMHO, there is not enough air coming through the radiator. Something is blocking the air movement through the fins.


1996 White ZJ
1987 Maroon YJ (sideways build)
1996 Forest Green XJ

The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/
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post #62 of 70 Old 09-20-2013, 05:43 AM
Que89YJ
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Exactly. That is what the shroud will do. It focuses the fan on the radiator. I am curious to see if he gets that big a drop with it. It's ruining about 20 degrees high. If it brings it into spec that is huge. I have heard of people having issues with the winch blocking flow. Waiting to see how this works out.
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post #63 of 70 Old 09-20-2013, 05:31 PM Thread Starter
cgcarpenter
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Quote:
Originally Posted by Que89YJ
Exactly. That is what the shroud will do. It focuses the fan on the radiator. I am curious to see if he gets that big a drop with it. It's ruining about 20 degrees high. If it brings it into spec that is huge. I have heard of people having issues with the winch blocking flow. Waiting to see how this works out.
Picked up the shroud today for 20 bucks with no hardware so I'll be going to homedepot or something tomorrow morning

And temps aren't at 230 till parked or at stop lights for a long time. freeway it barely goes over 210 and that's when driving above 65-70mph.

I said if this shroud doesn't work... A high flow radiator and high flow water pump might be a good idea.

We'll play it by year.
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post #64 of 70 Old 09-20-2013, 06:23 PM
Chrisnvegas
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Slow down. No need to try and reinvent the wheel.

When my Jeep started running a bit warm last year, I ordered a new MOPAR water pump, thermostat, fan clutch, radiator cap.
While I was waiting for the parts, I took my good old brass 20 year old radiator to a shop and has them clean and repair it. I used all oem parts as they lasted 20 years!
Perfection! Remember, the factory designed these parts and tested them for hundreds of thousands of miles. Even at Death Valley in the summer.
High flow radiator? The thermostat will determine the flow anyway. The antifreeze needs to be in the radiator long enough to cool it.

Put the parts on it that were designed for it and you will have zero problems...

What happens in my Jeep, stays in my Jeep
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post #65 of 70 Old 09-20-2013, 06:38 PM
Apollo12227
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I've read as much of this as I can before I leave from work... The OP stated this YJ was recently purchased... Is the temp sender for the gauge at the back of the block with 1 purple wire going to it like the YJ? If so, have we verified it is actually overheating? I only ask because if the previous owner replaced the sender, and used one from autozone/advance, etc... then there is a VERY HIGH chance the sender is reading 30* (ish) hotter than actual temp... I had to buy my sender from the dealer, as soon as I did this, there was a 30* drop in highway running temp.

I spent an ungodly amount of money on the cooling system, just to find out 3 seperate temp senders from 3 seperate places were reading hot. Apparently there is a difference between xj and yj senders, despite what the autozone/advance part #'s say....

Just my 2 cents... I apologize is this is irrelevent or already covered.
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post #66 of 70 Old 09-20-2013, 06:47 PM
Que89YJ
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I agree 100%. It is on the list. You always get the po mess ups.
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post #67 of 70 Old 09-21-2013, 01:01 AM Thread Starter
cgcarpenter
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Quote:
Originally Posted by Apollo12227
I've read as much of this as I can before I leave from work... The OP stated this YJ was recently purchased... Is the temp sender for the gauge at the back of the block with 1 purple wire going to it like the YJ? If so, have we verified it is actually overheating? I only ask because if the previous owner replaced the sender, and used one from autozone/advance, etc... then there is a VERY HIGH chance the sender is reading 30* (ish) hotter than actual temp... I had to buy my sender from the dealer, as soon as I did this, there was a 30* drop in highway running temp. I spent an ungodly amount of money on the cooling system, just to find out 3 seperate temp senders from 3 seperate places were reading hot. Apparently there is a difference between xj and yj senders, despite what the autozone/advance part #'s say.... Just my 2 cents... I apologize is this is irrelevent or already covered.
Great info and I appreciate it but why would it only read hot like that sometimes? And only after parked?
It seems to be fine the rest of the time. We just drove it on the freeway for 45 minutes and it BARELY went over 210 going about 70-75ish.


I'm going to check the sensor with a multimeter on Monday regardless.
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post #68 of 70 Old 09-27-2013, 06:29 AM
Rproject
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cgcarpenter,

Inquiring minds are wondering if you came to an end conclusion on this one?

1996 White ZJ
1987 Maroon YJ (sideways build)
1996 Forest Green XJ

The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/
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post #69 of 70 Old 09-27-2013, 12:07 PM Thread Starter
cgcarpenter
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Quote:
Originally Posted by Rproject
cgcarpenter, Inquiring minds are wondering if you came to an end conclusion on this one?
Terribly sorry gentlemen very busy with school and work this last week and getting my jeep ready for a run tomorrow but will update as soon as this is done.
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post #70 of 70 Old 10-09-2013, 04:11 PM Thread Starter
cgcarpenter
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So by time I got the shroud in the weather has been pretty cool.
But it did make a little difference I won't be able to tell until it gets hot again.

It made a big enough difference that with a 180 tstat it stays about 190 on the streets(kinda low now I know lol) and my girlfriend says she can drive on the freeway at 75 with no problems now.

I'm assuming this weather is helping a lot but the shroud is helping too.
Is it enough? We'll see when it gets up to the mid 90s again.

Thanks a lot for the help guys... Never would have thought a fan shrouds would be so important to the cooling. I thought it was just there so you don't drop something in there or chop off a finger lol
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