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RRC Coolant Temps

3 years 5 months ago #7576 by jhawk
Ok, with things heating up my RRC is running hotter than I think it should. With an IR temp gun I'm getting about 220 at the top of the radiator and 200 at the bottom. Does that sound about right? All of the Discos I've had just ran right in the middle of the gauge so I never bothered to check.

Thanks,
Jim

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3 years 2 months ago #7782 by azarmadillo
I just bought a laser temp gun so I'll check mine next time I'm out.

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3 years 2 months ago #7784 by le1gf
I noticed the same thing with my Classic. When I was in the mountains a couple of weeks ago, the temp was where I thought it should be (in the middle of the gauge). Otherwise, most of the summer it seemed to run hot. It never overheated or got into the red zone, but the gauge was showing that the temp was definitely up there. I did think it was going to go into the red zone once and I pulled over. With the temps down the last few days, it seems to be running in the middle of the gauge again. I did check the coolant level and it was right where it was supposed to be.

Glenn Onodera
'97 Rover P38 3" Coil Spring Conversion, Front Lockrite, Rear TC
'88 Classic Stock

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3 years 2 months ago #7785 by jhawk
Mine stay in the middle of the factory gauge. I installed an aftermarket gauge. That along with an IR gun is where I'm getting my temps. With the tenperature down last week it was running 200-210. Chad, I'm interested to see what numbers you have. Glen, if you want to swing by and borrow my IR gun feel free.

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3 years 2 months ago #7788 by SALTY164
My '95 LWB was running hot at the Gila Challenge when under load or going uphill, particularly if the A/C was on.

I replaced the water temperature switch (turns on condenser fans when coolant temp reaches a certain threshold, which I can't remember) hoping that would solve the problem but it didn't. FYI, I had also recently replaced both condenser fans so I knew those weren't the issue.

After consulting with Kevin and Joe at ROV-N-TECHS, we concluded that the cause was most likely a partially clogged radiator since the viscous fan was operating properly and I had recently replaced the belt and tensioner. I was gonna pull it and have it rodded but decided to replace it with a new one.

During the swap, I also replaced the thermostat and obviously added new coolant. Problem SOLVED.

Things to keep in mind if your temp is running high in the summer:
1. Ensure both condenser fans are working. Switch on the A/C and turn the blower control to 2 or 3. Walk to the front of the car, you should hear the fans blowing.
2. Water temperature switch may be faulty, thus not kicking on condenser fan when necessary. If your car is hot and you turn it off, you should hear the fans continue to run for a few minutes. If you hear this, you know your switch is still good.
3. Sitting at a stop light in summer with A/C running will over heat a faulty system, particularly a clogged radiator, in a hurry due to high heat of the condenser, its close proximity to radiator and lack of airflow over both.
4. Driving up a steep hill with the A/C on will raise the temp in a hurry too. I usually cut my A/C off when i head up the hill to Flagstaff.
5. Partially clogged radiators, locked viscous fans, failed water temperature switches and failed condenser fans are some of the most common reasons for overheating RRCs.
6. Check the the belt tension and the tensioner. A failing water pump could also be the culprit but I don't know how to check that.

HTHs,

Good Luck,
Mark A.
K7MTA

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3 years 2 months ago #7806 by azarmadillo
I checked my temp at the thermostat housing and it's running right about 190 degrees.

I have a new genuine radiator and I use Sierra brand coolant (the green pet/eco friendly stuff that's hard to find). I NEVER have any cooling issues under any circumstances. I can idle all day in 120 degrees with the AC on or I can pull a trailer to Flagstaff with the AC on and it never gets hot.

That, my friends, is how you get 226,000+ miles on a Range Rover Classic engine and it's still going strong.

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3 years 2 months ago #7807 by jhawk
Cool, I'm running 210 or so at the thermostat housing. I guess I need to start saving my nickels for a new radiator.

Jim

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2 years 8 months ago #8332 by admin
I have a similar issue with my 01 Disco 2 about a week after I bought it checked all the fluids full ok everything running good only 111 on the OD, thought lets take this thing to Payson ran perfect till I got to mazatzal casino all of a sudden bam temp starts rising thought crap hauled a** to my cousins who happens to be a master mechanic five minutes from there when I got there coolant shooting out of the reservoir cap and no where else with both fans running we let it cool and found no apparent leaks except that the reservoir cap was missing an o ring ok cool filled it back up with fluid took it on a 2 hr off road trip no problems what so ever drove it back to phoenix and back and fourth to work for another month no problems. Took it to Payson again to visit my cousin this time no a/c on after 4 peaks turn off and as soon as I get to casino bam temp rising thought wtf. So this time put new hoses, coolant, cap, radiator, thermostat, and overflow tank been four months now no issues. I have not taking it to Payson yet lol. I'm scared ....lol but never the less I love it coolest car I ever owned! On a closing note if it happens again cracked block or minor blown head gasket damn Bosch engines! P.S. sorry for the long tex...
Sean

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2 years 8 months ago #8333 by 05LR3AZ

I have a similar issue with my 01 Disco 2 about a week after I bought it checked all the fluids full ok everything running good only 111 on the OD, thought lets take this thing to Payson ran perfect till I got to mazatzal casino all of a sudden bam temp starts rising thought crap hauled a** to my cousins who happens to be a master mechanic five minutes from there when I got there coolant shooting out of the reservoir cap and no where else with both fans running we let it cool and found no apparent leaks except that the reservoir cap was missing an o ring ok cool filled it back up with fluid took it on a 2 hr off road trip no problems what so ever drove it back to phoenix and back and fourth to work for another month no problems. Took it to Payson again to visit my cousin this time no a/c on after 4 peaks turn off and as soon as I get to casino bam temp rising thought wtf. So this time put new hoses, coolant, cap, radiator, thermostat, and overflow tank been four months now no issues. I have not taking it to Payson yet lol. I'm scared ....lol but never the less I love it coolest car I ever owned! On a closing note if it happens again cracked block or minor blown head gasket damn Bosch engines! P.S. sorry for the long tex...
Sean


Belts routed correctly?

05' LR3
01' E-350 7.3L 4x4 - Sportsmobile pop-up
94' DI - ROKROVR
[bt]91' RRC SWB[/b]
Shaun - KF7KOY

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