Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Closed Thread
LinkBack Thread Tools Display Modes
Old 07-11-1999, 07:49 PM
Registered User
Join Date: Jul 1999
Location: San Diego, CA USA
Posts: 38
Had my 90k service recently, and since then, the operating temp has gone up about an average of 10 degrees C.

The needle used to hover a little above the 80 C mark, but now it seems more at home between 90 and 100.

It's been a bit warmer here the last couple days, but this is San Diego, so warmer means in the 80's as opposed to 70's. :^) Doesn't seem like it should make that much difference...

Oh, yeah, air conditioning on/off has little effect (and it didn't before).

Am I still within the proper operating temp range for the 3.8L V8?

Could a change oil viscosity have an effect on running temperature? The car is new to me, so when I did my first oil change, I had 10W-40 put in per the owner's manual. Its second oil change came at the 90k service, and they put in 20W-50.

What's the ideal weight for San Diego weather? (60-80F all year) The book's graphs don't help too much - almost all of the oils encompass the temperature range this car lives in.

I'm concerned because I'm getting ready for a trip to Las Vegas next week and do NOT want to be stuck with overheating problems.

Thanks in advance for your great advice. :^)


1983 380SEL 87k mi
Old 07-11-1999, 10:09 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
HMMM I don't think the service had anything to do with it. I think the warmer weather is to blame. My advise is to check the aux fan to be sure that it is working with the air on. Also check to see if the coolant is at proper level.


Old 07-11-1999, 10:46 PM
Registered User
Join Date: Jul 1999
Location: San Diego, CA USA
Posts: 38
Thanks for the reply, Benzmac.

I just had my coolant drained and refilled, and it's nice and full.

The aux fan (the one in front of the radiator, right?) doesn't kick on in unison with the A/C being turned on, but does turn on shortly thereafter (when the temp gauge gets above 80).

I guess it must be the weather that's affecting it, but here's my remaining concern: What will 110 degree F desert temperatures do to it?? I don't want to get stranded in the middle of Nevada, and would like to keep my A/C on throughout the trip. I have to imagine that the car was engineered to withstand such temperatures for a couple hours, but I just want to be sure that I'm in spec during normal conditions, so that when I push it to the limit, my temp gauge stays safely away from that 120 degree red mark!

Closed Thread


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
116 normal operating temp ptoro01 Vintage Mercedes 14 06-01-2004 07:42 PM
Operating temp? richbark Tech Help 0 10-09-2002 08:53 AM
Operating temp for the 603 turbodiesel Diesel Discussion 11 07-08-2002 10:16 AM
AIR at operating temp to reduce idle HCs? sixto Tech Help 2 06-11-2002 02:24 PM
'87 300D operating temp? lrg Diesel Discussion 5 02-13-2002 08:07 PM

All times are GMT -4. The time now is 12:52 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page