I put that gold-colored Xerex G-05 in my 1985 300D. Now it runs at about 95 degrees, where it used to run at about 90 degrees. I also changed the thermostat, so I'm thinking that is probably the cause. Even so, I thought I would ask whether anyone had heard that G-05 makes an engine run hotter.

And should I care? I swear the car seems to run more smoothly now than it did before. I just don't want to do anything to shorten the life of the engine.

Differences in either the mix percentage or the thermostat. I have seen thermostats be rated the same but make the car run cooler or hotter.

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Jim

I switched to G-05 from Prestone. There was no change in temperature. '82 300D.

There is always a tendency to use too much anti-freeze. The SDL takes 11 quarts of coolant, total. So, the anti-freeze should not be more than 5.5 quarts for this vehicle. It's very easy to use more when you purchased two gallons.

The more anti-freeze, the less the cooling capability.

Most places in the US would be fine with 4 quarts of anti-freeze in an 11 quart system.

Might there be air trapped in the system?

Sixto
95 S420
87 300SDL

I was wondering the same thing. Any way I can check that?

It usually seems to take a few days of heat-up, cool-down cycles to burp all the air out. Give it about an hour to cool down after running, then open the coolant resevoir cap to "burp" it. Do this with the front of the car elevated a bit if possible. If it looks like it needs coolant, add water instead of anti-freeze until you get the mixture down to a bit less than 50%. Also, when you are running the car, turn the heat on for a few minutes to flush any air pockets from the heater core. After a few days of this the temperature should be back to normal.

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Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



TRUMP .......... WHITEHOUSE
HILLARY .........JAILHOUSE
BERNIE .......... NUTHOUSE
0BAMA .......... OUTHOUSE

Thank you for all the suggestions.

try and run it full heat for a little bit (few minutes)...could help it burp......

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Don't forget to buy yourself a handy dandy antifreeze tester to make sure your coolant is at the right concentration. If not, we have nothing else we can do except punch a hole in your engine block to burp it.

http://store.yahoo.com/bradystools/antektoin701.html

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

These systems are generally self bleeding through the overflow/resevoir tank. If you system is leak free it should bleed itself out in short order, just keep an eye on the over flow tank.

The only sure fire way is to find the highest point in the system where you can bleed, and crack open as you fill, keep letting coolant and air flow until there is no more air.

Also always remember to through your climate control into FULL HEAT/DEF mode t make sure you are cycling through the heater core, this is often a step that is missed and introdues alot of air into the system.

Good luck

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Stable Mates:
1987 300TD 310K mi (Hans)
2008 Jeep Grand Cherokee OM642 165k mi (Benzrokee)