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Old 04-29-2000, 03:19 AM
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Hello Gang.. Question, Just had A/C redone, before the repair with no A/C my 78 300 SD W116 125K Temp ran at 178*F after the repair
car runs between 178*F and 200*F... What
is normal Temp?????Also, PO hit a deer, Had front end repaired.. I noticed that the aux. Fan does not lay flush against the radiator
is this a problem ????I purchased a thermometer to guage the temp of air flowing through my new A/C, blows between 41*F and 47*F is this acceptable ???/

Thank You,


[This message has been edited by juan (edited 04-29-2000).]

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Old 04-29-2000, 12:03 PM
Aaron's Avatar
Join Date: Aug 1999
Location: Cincinnati, Ohio
Posts: 1,937


Your A/C temp sounds right, but your aux fan is sitting directly in front of the A/C condenser and the radiator is behind that. Anyhow, the distance that the fan is from the equipment should not have a big impact on temp at all. My '80 SD's gauge is calibrated in celsius, but 80 degrees C is around 175-178 degrees F. The temp increase you speak of sounds relatively normal. I assume the aux fan is functioning? A good precaution on your car would to just give the radiator cooling fins a quick checkover just to make sure none of them are leaking. I just dropped a brand new radiator in my SD, and although it wasn't overheating with the old one, it was losing enough coolant that it worried me, and I decided that rather than a recore, I would just get a brand new Behr unit from MB. For around $550 it's back in business again, of course I just got the 450SL out of winter storage, so the SD is going to sleep for the summer! Well, good luck with your car. The W116 is the best turbodiesel to have IMHO.

Aaron Greenberg
MB technician
Precision Motorcars, Cincinnati, Ohio
'67 250SE Cabriolet
'77 450SL
'80 300SD
'85 380SE
'89 420SEL
'93 300E 2.8
'74 Jensen Interceptor Mk.III
'81 DeLorean DMC12
'85 BMW 745i Turbo

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