Thread: American know how.

This mod is on my to do list. I want to keep the temp at or below 90.

Isn't the original design something to do with getting the heater matrix hot as fast as possible and keeping it hot?

Originally Posted by Chubbs878

I don't know what the hell this other guy is talking about. The proof is in the coolant temps. I didn't even bother to read what he says or whatever research he has done.

That's a pity, as I always keep an open mind. I read what you have to say, as I thought we were all here to learn...

Originally Posted by northiam

how the cooling system works, basics | Grumpys Performance Garage

Drill a little hole(s) to maintain some flow for sensing

May be a little childish of me, but I love those clear water pipes on that beautiful chromed V8! I'd love to know how long they'd last...

Here we go; from RAVE:

General
The cooling system used on the V8 engine is a pressure relief by-pass type system which allows coolant to circulate around the cylinder block and the heater circuit when the thermostat is closed. With coolant not passing through the
radiator, this promotes faster heater warm-up which in turn improves passenger comfort.

By-pass flow valve
The by-pass flow valve is held closed by a light spring. It operates to further aid heater warm-up. When the main valve is closed and the engine speed is at idle, the coolant pump does not produce sufficient flow and pressure to open the
valve. In this condition the valve prevents coolant circulating through the by-pass circuit and forces the coolant through the heater matrix only. This provides a higher flow of coolant through the heater matrix to improve passenger comfort
in cold conditions.

To our American cousins.
Mark Adams has considerable street cred with the Land Rover enthusiasts around the World and if he has done research on thermostat operation, I for one would listen to him.

You can be excused I guess from not knowing of his experience down there in Texas.

This is Mark Adams' company

Tornado Systems | Engine Management Technology Specialists

Regards Philip A
PS I really don't think that quoting from Rave is qualitatively equivalent to actual research done by a RV8 specialist.

Originally Posted by PhilipA

To our American cousins.
Mark Adams has considerable street cred with the Land Rover enthusiasts around the World and if he has done research on thermostat operation, I for one would listen to him.

You can be excused I guess from not knowing of his experience down there in Texas.

This is Mark Adams' company

Tornado Systems | Engine Management Technology Specialists

Regards Philip A
PS I really don't think that quoting from Rave is qualitatively equivalent to actual research done by a RV8 specialist.

I'm sorry about my comment. We are on opposing sides, so I really just don't have any interest in the bypass and external thermostat blending at the radiator outlet. If that worked on these trucks, they wouldn't be a dime-a-dozen parts trucks and recyclables with blown engines; you wouldn't be able to buy them for $3500 US on any given day. The Disco has no resale value because of its reputation for vomiting head gasket and cylinder liners. All of these problems are related to the OAT coolant and operating temps. Think about it. Get away from the bypass loop and save what's left of your Rover V8. Nothing but success stories and happy enthusiasts as result of the thermostat mod. We should be talking about that and not entertaining ideas of a bypass system on the old Disco. LR engineering dropped the ball on this one. 180 degree Thermostat on the outlet manifold would have probably prevented catastrophic failures on all of these aluminum blocks. The liners can't slip of the temp stays under 200F. Obviously a fully and reliably functioning temperature gauge would help the overheating incidents as well. Don't know how they work on overseas models, but over here we deal with a 3-position temp switch that reads stone-cold, 150-230 center of gauge, and HOT but the warning is already too little, too late. It seems to me that LR WANTED to blow every last engine.

Originally Posted by PhilipA

To our American cousins.
Mark Adams has considerable street cred with the Land Rover enthusiasts around the World and if he has done research on thermostat operation, I for one would listen to him.

You can be excused I guess from not knowing of his experience down there in Texas.

This is Mark Adams' company

Tornado Systems | Engine Management Technology Specialists

Regards Philip A
PS I really don't think that quoting from Rave is qualitatively equivalent to actual research done by a RV8 specialist.

Wow! Shots fired!

One at me for supporting my comment on the intentional design of the bypass system by providing information from the manufacturer and one at the Texans.

I have the upmost respect for Mark Adams. I was extremely happy with the conversations I had with him and the work he did for me on my ECM for my modified 4.6L. However, in your link there is a clue as to what Mark is a specialist in, and most likely is the best in the world. And, by his own admission by saying he has an open mind, he is not a specialist in engine cooling systems.

From what I have read on other forums (in particular landroverforums.com), many D2 owners in USA have done this modification which reduced and stabilised their operating temperature range without any issues in a variety of climates. This has to be a good thing?

I must state I too am not a specialist in cooling systems (or anything else related to Land Rover) and I also have an open mind.

Originally Posted by PhilipA

To our American cousins.
Mark Adams has considerable street cred with the Land Rover enthusiasts around the World and if he has done research on thermostat operation, I for one would listen to him.

You can be excused I guess from not knowing of his experience down there in Texas.

This is Mark Adams' company

Tornado Systems | Engine Management Technology Specialists

Regards Philip A
PS I really don't think that quoting from Rave is qualitatively equivalent to actual research done by a RV8 specialist.

What are you talking about? I never quoted RAVE. Furthermore, Land Rover engineers were also RV8 "specialists." That still doesn't make them right. Honestly, I would put more trust into someone who specializes in anything but Rovers, and utilizes that knowledge to improve the lesser-quality, poorly engineered mechanicals that is the Rover.