Disco 2 cooling mod results

4Runner

Well-known member
May 24, 2007
660
110
Boise Idaho
With my old D2 I ran a 160 stat with the inline mod. Also ran a real coolant gauge. It seemed to be consistent 180 with the Chevy light duty clutch and a D1 fan blade.

Got 300k on that engine before I stopped giving a shit working on it for all the other D2 related issues.

Long story short the light duty clutch stopped making that air plane noise at start up and I just didn't care and it overheated on a 100 degree day and cracked the radiator.

It's now a toaster at a Walmart near you.
Pretty sure I have one of those toasters made from the temp gauge part of yours. It’s off, it’s on but who knows what temp, and my toast is solid black and now occupies the crumb tray. Isn’t that such a Rover cooling experience.
 
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donniefitz2

Well-known member
Sep 15, 2020
138
56
Scottsdale, AZ
fitzventure.com
Well, I was able to buy a Flowcooler water pump and put it on the other day. My temps have come down about another 2-4 degrees and are even more stable now.

The combination of the fan, clutch and water pump have pretty much eliminated my high temp anxiety.

It hasn't been very hot the last few days (only about 103) but, my temps stayed under 200 about 90% of the time in mixed driving situations, including long idling.

Huge thanks to @4Runner for the info and part numbers.
 

Windycity_Rover

Well-known member
Dec 4, 2004
72
0
53
Da Windy City
I'm having the same issue and just ordered the FlowKooler pump. Why use the Dorman 620-602 and trim it vs. 620-112? Anyone change to a FlowKooler pump and stock fan?
 

Al Swearengen

Member
Sep 19, 2017
11
4
Los Gatos
Just ordered a Flowkooler this morning. Last one they had on the shelf but more on the way. The castings are either on order or out to anodizing the 6061 material. The color is already set for the remaining batch of castings.
I told him that Land Rover pumps ought to be green, if he's going to anodize them. The current batch is, well, nevermind. Call or email and ask for the green LR pumps.
They sold out of the initial batch sooner than he expected.
 
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outono

Well-known member
Sep 26, 2020
162
85
Orange, CA
Just adding to the testimonials here. Recently replaced the whole cooling system in my 98 (radiator, Flowcooler, 180 T-stat, etc..).

On the freeway, I run 182 - 184F. Idling in town, im around 186 - 188F. I've never seen temperatures higher than 193F since the cooling work was done.

The main question I have now is: am I running too cool? I feel like the engine is running richer than it should be.
 
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4Runner

Well-known member
May 24, 2007
660
110
Boise Idaho
Just adding to the testimonials here. Recently replaced the whole cooling system in my 98 (radiator, Flowcooler, 180 T-stat, etc..).

On the freeway, I run 182 - 184F. Idling in town, im around 186 - 188F. I've never seen temperatures higher than 193F since the cooling work was done.

The main question I have now is: am I running too cool? I feel like the engine is running richer than it should be.
I wouldn’t worry about that. I had a 96 D1 that I ran that cold maybe a tad colder and it ran great that way. Never noticed any extra enrichments or open loop caused by that temp. Maybe you have something else going? Just my 2 cents worth.
 
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