CL65 normal operating engine/water temperature

Jan 16, 2009 | 10:42 PM

Totalman

Thread Starter

Junior Member

Joined: Oct 2007

Posts: 41

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From: NJ

'05 CL65, '07 Pathfinder, '97 SL600 (sold), 23 other cars (sold)

CL65 normal operating engine/water temperature

Guys,
Does anybody know what is the normal (official standard) engine/water temperature range for '05 CL65? I cannot find this information anywhere.

Mine keeps showing somewhere betw. 80C and 90C, I just feel this may be a bit too high...?

Jan 17, 2009 | 03:37 PM

HRE

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Joined: Sep 2007

Posts: 59

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2005 CL 65

Mine runs in the same range...

Jan 18, 2009 | 12:40 AM

TMC M5

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Joined: Nov 2002

Posts: 2,895

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From: Maryland

'14 E63S & '14 Audi SQ5

Same here...although yesterday in 3 degree weather it stayed below 80 as the running temp

Tom

Jan 18, 2009 | 11:00 AM

alx

MBWorld Fanatic!

Joined: Dec 2004

Posts: 4,268

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180 water, 210 oil is considered to be optimal for longevity.

200 water, 220 oil is considered optimal for power as long as you can provide cold intake charge.

your reading is normal.

alex
few cars

Jan 18, 2009 | 11:02 AM

Totalman

Thread Starter

Junior Member

Joined: Oct 2007

Posts: 41

Likes: 0

From: NJ

'05 CL65, '07 Pathfinder, '97 SL600 (sold), 23 other cars (sold)

Thank you, guys.

Jan 20, 2009 | 01:51 AM

DougM

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Joined: Jan 2009

Posts: 47

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From: Georgia

CL65 AMG

same here...needle width or two over 80...been 35-50 degrees here lately

Feb 3, 2009 | 03:06 PM

sound 8

MBWorld Fanatic!

Joined: Apr 2008

Posts: 2,838

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From: U.K.

SL 63 W/B AMG , S600,C220

Mine seems to always be around 80, but once I was stuck in traffic for over an hour and it reached over 90, I was concerned but my garage assured me it would not overheat because of the hot and cold weather testing done by
Mercedes.

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Jan 16, 2015 | 07:06 PM

khutchinson22

Senior Member

Joined: Dec 2014

Posts: 286

Likes: 4

CL55

I am having this issue as well. I have never seen a vehicle without a cooling system issue fluctuate water temps this much. (Assuming there is no issue.) At ambient temps around 30f-40f my water temp stays right around 80c. Today it was 55f ambient and water temp was around 90c-95c. Needless to say I am a little concerned.

In searching the forum it looks like I should upgrade my IC pump and heat exchanger. I won't be able to do that right away so I am inquiring as to weather I have cause for concern or not.

That being said, recommendations for heat exchanger and IC pump would be helpful. What have your experiences been?

Last edited by khutchinson22; Jan 16, 2015 at 07:08 PM.