What is the proper engine operating temperature.

Tiny
ANONYMOUS
  • 1991 MERCEDES BENZ 300SE
  • 211,000 MILES

What is the proper engine operating temperature for 1991 300SE.
Mine operates at 80C which seems cool as far as inside heater output goes. Can I get a thermostat for hotter operation?

Monday, December 31st, 2012 AT 4:07 AM

1 Reply

Tiny
DRCRANKNWRENCH
  • EXPERT
  • 3,449 POSTS

It is operating correctly. Sometimes the heaters do not put out very hot air as the engine is mostly aluminum and cools quickly. You can get a hotter thermostat, but only go a few degrees or the next step. Don't run it hotter than that, it will give the performance and fuel economy problems.

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Monday, December 31st, 2012 AT 4:11 AM

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