300SE nearly overheats when going slowly uphill
09-30-2014, 05:23 AM
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Mercedes 300SE - 1992
300SE nearly overheats when going slowly uphill
Hello MBworld,
This is my first post, and sadly, it's about a strange problem with my car.
I have a Mercedes 300SE 1992 that is running hot going uphill, especially in slow traffic.
The engine's temperature would increase from 80C to 110C in a 5 minute slow trip uphill.
It would stop heating when I get on a flat surface, and after a while, the temperature would slowly drop.
Going downhill would cool the engine quickly from 100C to 90C in 30 seconds.
Other information:
Engine fans start spinning at 80C.
120C is the maximum temperature allowed (on the dashboard).
There is no coolant leak, and I'm only using water. No antifreeze.
The car usually ran at 80-100C (absolute maximum) during long trips, or even during traffic jams.
Engine fans are relatively loud compared to other cars of this model. Everybody would know that I'm here when I get there :P
Thank you.
This is my first post, and sadly, it's about a strange problem with my car.
I have a Mercedes 300SE 1992 that is running hot going uphill, especially in slow traffic.
The engine's temperature would increase from 80C to 110C in a 5 minute slow trip uphill.
It would stop heating when I get on a flat surface, and after a while, the temperature would slowly drop.
Going downhill would cool the engine quickly from 100C to 90C in 30 seconds.
Other information:
Engine fans start spinning at 80C.
120C is the maximum temperature allowed (on the dashboard).
There is no coolant leak, and I'm only using water. No antifreeze.
The car usually ran at 80-100C (absolute maximum) during long trips, or even during traffic jams.
Engine fans are relatively loud compared to other cars of this model. Everybody would know that I'm here when I get there :P
Thank you.
10-06-2014, 11:55 AM
#2
MBWorld Fanatic!
water is the worse thing you could run,you have probably rusted the cast iron block,so bad its clogging your radiator.Clean your cooling system out till it runs clear with vinegar,and water.Then add 50/50 antifreeze and distilled water,you more than likely also need a thermostat.
