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Old 07-27-2010, 12:13 AM
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CANDIDE CANDIDE is offline
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Join Date: Aug 2008
Location: Placerville,CA
Posts: 167
Quote:
Originally Posted by Brian Carlton View Post
You've clearly replaced every single component in that system and, at this point, it should be operating perfectly.........with one glaring exception.

When you change the airflow characteristics via the use of different fans/shrouding........etc, the result must be considered an experiment. You claim that "plenty of hot air is being emitted by the fans", however the engine might beg to differ with you.

Airflow across the radiator is a complicated subject at higher speeds and the fans may impede this airflow rather than enhance it.

I'd change back to the stock setup and see if your issue disappears.
I installed the original mechanical fan. The overheating is worse. And the engine feels more sluggish under acceleration. So, I went back to my electric fans. Also, today I removed the new MBZ thermostat and put my original MBZ thermostat back in. It runs cooler. About 10-15 degrees C cooler. Both thermostats have identical P/Ns and were bought from the same MBZ EDH dealership.

And now I measure 30-40 degrees F difference between upper and lower radiadtor hose.

I am happy with the reduction in operating temperature, I am, however, flummoxed by the difference by changing 2 identical part number thermostats. I have other projects that compel me, so I can't delve into a more definite description of my overheating problem.
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