Engine temp query

malagabob

Active Member
Joined
Jul 3, 2015
Messages
37
Reaction score
1
Location
S wales
Your Mercedes
a200 amg 2014
I’ve noticed that from when I originally bought the car A few years ago, the position of the temp needle has gone up from it’s original position Fully warmed up engine. Not a lot, not overheating. About the width of needle. There’s water in expansion bottle. New engine oil a few months ago. Any ideas thanks.
 

onefortheroad

Senior Member
Joined
Dec 8, 2015
Messages
3,468
Reaction score
2,096
Location
uk.
Your Mercedes
Me -2019 GLC 350 coupe AMG line. Mrs- ford kuga 65 plate awd powershift .
Normal temp is 90 .
 

robin.large

Senior Member
Joined
Sep 11, 2019
Messages
394
Reaction score
343
Your Mercedes
CLS C63 AMG 2013
Temp should be 87/90. It's possible that the thermostat is past its best. When they fail it's obvious but I've seen them gradually 'go south' before outright failure. And a new thermostat is a cheap and easy thing to replace. Maybe also replace coolant for all round peace of mind?

Sent from my ONEPLUS A5010 using Tapatalk
 

rayhennig

Senior Member
Joined
Nov 16, 2006
Messages
716
Reaction score
158
Your Mercedes
1991 300CE-24 Sportline
I consider 88 normal
Mine's at 87 with 92 after long hill, with aircon in 35 ambient. Very happy with that and verified with both cheap and expensive laser thormometer.

But the gauge reads 10 higher. So, never trust 100% gauge or sensor.

RayH
 

ajlsl600

Senior Member
Joined
Nov 18, 2013
Messages
9,089
Reaction score
6,119
Location
france
Your Mercedes
clk3202001,sl6002003 with everything regrettably sold ,A class 170cdi auto. NG/TF1800 ML250
Mine's at 87 with 92 after long hill, with aircon in 35 ambient. Very happy with that and verified with both cheap and expensive laser thormometer.

But the gauge reads 10 higher. So, never trust 100% gauge or sensor.

RayH
Often in car gauges only an indication of trend of ,too hot /cold.
Now you know where 88 is you can judge if you have an issue.
 

mioba

Senior Member
Joined
Feb 19, 2006
Messages
7,965
Reaction score
4,714
Location
Nottingham and Köln
Your Mercedes
W124/E200, W220/S320CDI, W205/C200, W251/R350CDI 4Matic
Sounds fine to me, get the coolant tested if your worried to see if its at the right mix. If the stat fails you will that clearly.
If it aint broke dont fix it.
 

LostKiwi

Senior Member
Joined
Aug 25, 2006
Messages
31,363
Reaction score
21,629
Location
Midlands / Charente-Maritime
Your Mercedes
'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
Many modern temperature gauges are electronically controlled to show normal at 80-95 degrees to stop people worrying about them rising and falling.

Older MBs have normal operating temperature at 82 (our r129 and 210 for example) but if the Aircon is on and outside air temp is over 30°C the temperature in the 129 rises to around 90 - 95°C. I'm thinking I may replace the thermostat on the 129 as a preemptive action and give it a full coolant flush and replace.
 


GAD was founded in 2009 where we developed bespoke ECU Remapping software for motorsport clients, moving forward, we have extended to road vehicles for both performance and economy,
contact GAD Tuninghttp://www.GADTuning.co.ukto discuss your requirements.
Top Bottom