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Old 01-08-2014, 06:59 PM
Motorhead's Avatar
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Proper thermostat temp for 1966 230SL

I am doing a coolant flush on a 1966 230SL with mechanical fuel injection.
There are 3 choices of temperatures for the thermostat when you look it up online. I know that with the mechanical injection you need proper temperature for the injection pump to come off of cold enrichment when the engine is warmed to operating temperature.
I see three thermostat temperatures available: 71C, 79C, 88C.
Forgive me for saying this but... No guesses please. It is an elder friends car that I have worked on for a few years and the car is bone original. Thanks for any info.

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Old 01-09-2014, 05:34 AM
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If you want more power the coldest one.The hottest lower emissions.The medium would be good for traffic and mountains
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Old 01-09-2014, 01:37 PM
is thinning the herd
 
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I've only seen the 79 and 87. Does the car have air?
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Old 01-09-2014, 04:37 PM
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Quote:
Originally Posted by Motorhead View Post
I am doing a coolant flush on a 1966 230SL with mechanical fuel injection.
There are 3 choices of temperatures for the thermostat when you look it up online. I know that with the mechanical injection you need proper temperature for the injection pump to come off of cold enrichment when the engine is warmed to operating temperature.
I see three thermostat temperatures available: 71C, 79C, 88C.
Forgive me for saying this but... No guesses please. It is an elder friends car that I have worked on for a few years and the car is bone original. Thanks for any info.
If you pull out the original....it should be stamped on the housing.

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