Good! Glad to hear people are using it. I got a sample when they first came out with it. I dumped it in everything I own and notice a difference on really hot days. I have a manual temp gauge and it holds a lot steadier after.

 

I noticed the temp gauge is *really* slow to respond too. I have a Scangauge and it shows the temp up to 160 degrees before the dash gauge is off the first white line.
Just out of curiosity what is the 'normal' operating temp for these engines? I see from 198-204.
I heard that aluminium starts to change properties after 240+. If that's true I bet you can go past 240 before the dash gauge has gone past 3/4.
okdiscoguy: what temp does your manual gauge show?

Mark

 

Holds pretty steady at just under 200

 

Interesting... I have always thought my gauge was pretty darn responsive relative to all the other vehicles I have owned...

I can warm it up in the garage for a minute, driveone block and it's in the middle where is stays... (I've done all the flushing, etc., coolant is good, never overheated as far as I am aware, etc.)

 

Replace your thermostat, 195 is normal t-stat temp.
If you overheat a aluminum engine with steel cylinder liners you will drop a liner because the aluminum expands faster than steel.

 

Spot on. I would replace the thermostat when you do the flush.

On the comment earlier about the aluminum changing properties at 240F, a couple of things worth nothing.
1/ Aluminum alloys used in engines are metallurgically stable up to 450F or so. At that point the fatigue properties of the metal start to change andit accumulates fatigue cycles due to thermal stress. Still, it won't change substantially dimensionally until more than 520F.

2/ Air cooled aircraft engines also have aluminum cylinders with press-fit steel liners. The red line cylinder head temp on a typical aircraft engine is between 450F and 500F depending on the model. Even exceeding that temperature a bit won't cause the liner to separate from the barrel. Myinference from thisis that Rover engines which have experienced a dropped liner have probably exceeded the red line by a factor of 2 or more. Further,even on engines that have been overheated but not dropped a liner,the heads and blocks aremore likely to experience warpage or cracking.

Cheers,
Dave

 

Before I flushed and changed the water pump, my gauge in the truck would drift a little. I put on a manual gauge and it fluctuated a whole lot more. The gauge in the truck will sit in the middle, even though you are going through a broad range of temps. That is why people say to really watch out if it is climbing....