D-110 Strange Engine Cooling Characteristics - Page 2 - Defender Source
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  #21  
Old December 2nd, 2011, 09:34 PM
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Quote:
Originally Posted by NomaD110 View Post
Can someone give me a part number and a location as to where I can buy a 180 F thermostat? I think that will be the ticket. Pikes Peak told me today they have an 190 F one in my truck and that might be causing the issue. They also said some people drill a slightly larger bypass hole in the thermostat. Anyone here done that?
Yes I have.
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  #22  
Old December 2nd, 2011, 10:08 PM
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Check the timing just to be safe...if it's too far advanced it can cause a cooling issue. 180 thermostat is the only way to go unless you are in freezing temps. Good luck!
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  #23  
Old December 4th, 2011, 03:18 AM
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Quote:
Originally Posted by rover4x4 View Post
190 is lunacy, 180 max. NAPA or Autozone should have a thermostat flip the gasket over, you can drill a hole in the top of the thermostat if needed.


Have you ever serviced the cooling system? How old is the radiator? Your getting that thing hot.
Cooling system is bran new. And the timing is perfect. This is definitely the thermostat. As soon as I get back home I will be changing it to the 180.

------ Follow up post added December 4th, 2011 12:18 AM ------

Quote:
Originally Posted by 130Tdi View Post
Yes I have.
How big of a hole should I drill?

------ Follow up post added December 4th, 2011 12:31 AM ------

Where do I buy the 82 C thermostat? Rovers North only lists the 88 C which is what I have.

http://www.roversnorth.com/store/c-140-thermostat.aspx
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  #24  
Old December 4th, 2011, 12:00 PM
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Are there shocks that I can addjust up and down like my friends LX460? That would be very cool!
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  #25  
Old December 4th, 2011, 09:08 PM
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Thanks man...I wonder why it wasn't listed clearly on the V8 cooling section.
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  #26  
Old December 4th, 2011, 09:14 PM
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Yeah only reason I could find it was I had the rovers north magazine. I had previously asked why they even made two different temp thermastats
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Are there shocks that I can addjust up and down like my friends LX460? That would be very cool!
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  #27  
Old December 4th, 2011, 09:18 PM
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Rovers north is a rip off.


I drilled a hole similar in size to the factory hole in the factory thermostat.
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  #28  
Old December 4th, 2011, 09:18 PM
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Would you drill this one or should I just leave it as is. While I don't live in North Dakota I do travel up to some pretty cold locations.
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  #29  
Old December 4th, 2011, 10:13 PM
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Its 15 bucks. Just buy a new one
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Are there shocks that I can addjust up and down like my friends LX460? That would be very cool!
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  #30  
Old December 5th, 2011, 05:50 AM
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15358 Autozone Part Number.

There is no reason to drill a hole in the factory thermostat. Why buy a 10$ part and pay 10$ to have it shipped across the United States? I am using the above part number in 3 Land Rovers with no issues what so ever. This horse is starting to smell.
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  #31  
Old December 5th, 2011, 02:54 PM
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Thank you! I went ahead and ordered from RN. While perhaps they might be a little more expensive I appreciate their insight and great customer service.
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  #32  
Old December 5th, 2011, 06:26 PM
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Last time I called roversnorth they wanted to know what year my truck when I asked for 8 drive flange gaskets.
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  #33  
Old December 6th, 2011, 01:11 PM
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Quote:
Originally Posted by NomaD110 View Post
Cooling system is bran new. And the timing is perfect. This is definitely the thermostat. As soon as I get back home I will be changing it to the 180.

------ Follow up post added December 4th, 2011 12:18 AM ------



How big of a hole should I drill?

------ Follow up post added December 4th, 2011 12:31 AM ------

Where do I buy the 82 C thermostat? Rovers North only lists the 88 C which is what I have.

http://www.roversnorth.com/store/c-140-thermostat.aspx
You will still have the same issue with the 82C T-stat. At lower temperatures but the same scenarios 1 and 2 will happen anyways. I repeat, those are normal behaviours that occur when T-stat opens and you do have a gauge that shows real temperature. You dont see that happen with the stock gauge but it happens in the engine anyways. In scenario 2 doesnt happen because you get to the hill with all the cooling system at working temperature.

Cheers,
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  #34  
Old December 7th, 2011, 02:18 AM
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Quote:
Originally Posted by defeyago View Post
You will still have the same issue with the 82C T-stat. At lower temperatures but the same scenarios 1 and 2 will happen anyways. I repeat, those are normal behaviours that occur when T-stat opens and you do have a gauge that shows real temperature. You dont see that happen with the stock gauge but it happens in the engine anyways. In scenario 2 doesnt happen because you get to the hill with all the cooling system at working temperature.

Cheers,
I agree with what you are saying. Would you still make the switch to the 82 C? Are you saying it will help avoid reaching 220 F because it would open up sooner?
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  #35  
Old December 7th, 2011, 07:25 AM
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Im not familiar with V8s, but anyways 220 seems a little too high. But if that its just a peak temperature for a short period of time I dont know if I would worry. Anyways, I repeat we deal with Tdis here so I dont know the right cooling temperatures for V8s. But the behaviour you mention looks normal to me. Stock Tdis use 88C.

Cheers,
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  #36  
Old December 13th, 2011, 01:40 AM
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I thought I would update this:

I did finally get around to replacing the thermostat with an 82C model from Rovers North. I am happy to report that the issue has been resolved. As correctly predicted by some of you, the behavior continues but does it only to about 190F and doesn't get any higher. The car runs a little bit cooler at around 181F on the road under normal load. This is a perfect fix.

Thanks to all who contributed their input.

Cheers!
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  #37  
Old December 13th, 2011, 07:10 AM
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Glad that was a simple fix.
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  #38  
Old January 3rd, 2012, 01:16 PM
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im glad too. =)
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  #39  
Old October 15th, 2012, 07:12 PM
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Brought this back. Why is it ok in this truck and in Philip's but considered a bad solution for me?
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Are there shocks that I can addjust up and down like my friends LX460? That would be very cool!
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  #40  
Old October 15th, 2012, 07:52 PM
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I don't think that Christian's problem was caused by the thermostat. I suspect that the problem is his driving style and that the thermostat change was sufficient to mask the issue. I've had overheating issues in the past with my truck. They were ultimately fixed with a fresh head gasket, but I also replaced the VC, the radiator, the water pump and the thermostat, just to be sure. Once I did that, the truck was solid. It could idle in the heat and stay cool no problemo. Highway climbs never overheated me and I could climb Colorado passes, loaded down, with ease.

...but...

If I took it off road and dropped it into low range and started pushing 3000 RPM up a hill, it would start to get very warm. I took the advice of Land Rover guru Marc Olivares and stopped running such high RPMs. Instead of running in 2L @ 3000RPM up a hill, I'd run in 3L or 4L and keep the RPM around 1500 or so. No more issues. My suspicion is that the LR cooling system can handle the slow speeds in low range at 3000 RPM for a short period (like climbing a tough obstacle) but when you're chugging up a steep and long hill like this, you're going to overheat.

I've adjusted my driving style and run higher gears on the hills and no longer have any problems.
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