W124 Engine Temperature Enquiry

[Guest 5725]

Dear all bro/sis. This is the first time i post in the forum. Would like to check on something about W124.

I have been driving W124 for few years and always got one doubt in my mind. When i was stuck in the jam at checkpoint, my temperature gauge reading will goes from 80->90->100->110. This increase of temperature takes about 1 to 2 hours and by the time it goes to around 110, i passed the jam and so cant see if the temperature will keep going up and up. Is it normal. BTW, i drive 91' 8valves. Hope any bro/sis driving W124 can advice. :pray:

[g8crasher]

Dear 5725, welcome to the forum and please accept our congratulations on your first post. :yumyum:

Could you further elaborate on your temperature situation by letting us know if the aircon is constantly turned on throughout the jam and whether you have had your radiator fan modified to run at the highest speed setting ?

Quite dangerous to go past 105 IMHO. My concern is the long term damage the heat soak under the bonnet may cause premature wear and tear to the surrounding components.

[keltanky]

:clap: congrates on your virgin post!

yup like what g8crasher said, pls tell us more about your fan and aircon..

[Guest 5725]

i have modded my fan to operate once my engine started.

the air con is on throughout. i guess is the outside temperature that create the temperature raise. When i am struck in the jam at night or raining day, my temperature is lower around 100 and never go up again.

under hot sun, it will go up further.

[keltanky]

fan direct on. sure FC higher, but never mind, at least temp stays low!!

stuck at jam at night or raining day hover ard just below 100....

just asking is your reservoir leaking??

its true that outside temp affects the temp.

remember mike's never see any above 80!

mine if hits 100, i worry alot!!

[Guest 5725]

bro. did you struck in a jam like mine before? daylight in woodlands checkpoint for 1 to 2 hours under hot sun?

i have asked my workshop and MBM before. They did a check and told me no problem at all.

But keep seeing my temperature going from below 80 to 100+ keep making me worry about the overheating issue.

So i really want to know if my situation is normal for W124 owner.

One more thing, i noticed that when i put my gear to "P", then the temp is lower. the one that goes close to 110 is when start /stop situation while i am holding the brake all the time.

[keltanky]

bro. did you struck in a jam like mine before? daylight in woodlands checkpoint for 1 to 2 hours under hot sun?

i have asked my workshop and MBM before. They did a check and told me no problem at all.

But keep seeing my temperature going from below 80 to 100+ keep making me worry about the overheating issue.

So i really want to know if my situation is normal for W124 owner.

One more thing, i noticed that when i put my gear to "P", then the temp is lower. the one that goes close to 110 is when start /stop situation while i am holding the brake all the time.

i'm stuck in jams @ woodlands too!!

when you put to P or N, your temp goes down, due to engine rpm is higher, which makes your engine fan blow faster. i had this type of problems before, and found that my air-con fan not activating!

wonder the fan switch is .... oh by the way, your temostat is for which temp range, do you happen to know?

[Guest 5725]

oh. so my w124 is having problem liao.

usually, when driving on the highway, the temperature can go as low as 1 slot below 80.

Once it go in a jam, the temperature goes up and up till it come out from the jam.

I am not sure the range of my temostat. But i know it will spin faster when the temp go above 100.

[Guest sirBenz]

oh. so my w124 is having problem liao.

usually, when driving on the highway, the temperature can go as low as 1 slot below 80.

Once it go in a jam, the temperature goes up and up till it come out from the jam.

I am not sure the range of my temostat. But i know it will spin faster when the temp go above 100.

hey bro, welcome aboard. Here list of items u can check and do for you car.

1) Replace Expansion tank cap ( cheap abt $10)

2) Replace Thermostat of lower rating

3) Do entire cooling system flush

4) Check all the water jackets are ok

5) Check radiator for leak

6) Check water pump

[Guest Mike]

replace 78 deg thermostat. replace temp sensor and mod ur aux fan to run at high speed

[Guest sirBenz]

running aux fan at high speed will put huge stress on the alternator and battery.

[g8crasher]

running aux fan at high speed will put huge stress on the alternator and battery.

Look who's ride is in the workshop today getting both alternator and battery swapped. : Adding to the stress are 2 power hungry amplifiers, and a 1 farad capacitor. Bleedin' it dry bro...

[Guest sirBenz]

running aux fan at high speed will put huge stress on the alternator and battery.

Look who's ride is in the workshop today getting both alternator and battery swapped. : Adding to the stress are 2 power hungry amplifiers, and a 1 farad capacitor. Bleedin' it dry bro...

I feel you bro... since u got 2 power zapping amps..u shld uprate ur alternator.... did u?

[g8crasher]

I requested for a larger one but don't know what the mech has in store for me.

[Guest 5725]

oh. so my w124 is having problem liao.

usually, when driving on the highway, the temperature can go as low as 1 slot below 80.

Once it go in a jam, the temperature goes up and up till it come out from the jam.

I am not sure the range of my temostat. But i know it will spin faster when the temp go above 100.

hey bro, welcome aboard. Here list of items u can check and do for you car.

1) Replace Expansion tank cap ( cheap abt $10)

2) Replace Thermostat of lower rating

3) Do entire cooling system flush

4) Check all the water jackets are ok

5) Check radiator for leak

6) Check water pump

Thanks bro. will try to check all these again.

[Guest Mike]

it will not stress if u r using the correct rating of alternator and dun ever by pass it to run high speed when the key is turned

[Guest damagecar]

oh. so my w124 is having problem liao.

usually, when driving on the highway, the temperature can go as low as 1 slot below 80.

Once it go in a jam, the temperature goes up and up till it come out from the jam.

I am not sure the range of my temostat. But i know it will spin faster when the temp go above 100.

hey bro, welcome aboard. Here list of items u can check and do for you car.

1) Replace Expansion tank cap ( cheap abt $10)

2) Replace Thermostat of lower rating

3) Do entire cooling system flush

4) Check all the water jackets are ok

5) Check radiator for leak

6) Check water pump

Item 2 will lower down the temp. I used to change this twice a year.

1991-w124.

Try not to modify the fan to continously run at "turbo" speed. You will dun like the fan noise..hehe.

[Guest 5725]

oh. so my w124 is having problem liao.

usually, when driving on the highway, the temperature can go as low as 1 slot below 80.

Once it go in a jam, the temperature goes up and up till it come out from the jam.

I am not sure the range of my temostat. But i know it will spin faster when the temp go above 100.

hey bro, welcome aboard. Here list of items u can check and do for you car.

1) Replace Expansion tank cap ( cheap abt $10)

2) Replace Thermostat of lower rating

3) Do entire cooling system flush

4) Check all the water jackets are ok

5) Check radiator for leak

6) Check water pump

Item 2 will lower down the temp. I used to change this twice a year.

1991-w124.

Try not to modify the fan to continously run at "turbo" speed. You will dun like the fan noise..hehe.

bro. what you mean by "I used to change this twice a year" ?

[Guest Mike]

i think wat damagecar is trying to say is that he change his thermostat twice a year. =)

[Guest jameslhm]

bro 5725 i think i have the same issue as u mine is normal jam in sg my temp can go 100

[Guest Mike]

check the clutch fan... or convert it to 16 valves type. =)

[Guest wuyiche]

I recall with fondness the W124 I used to drive .. same problem I had too. I recall sending the car back to MBM on numerous occasions just to get it sorted. Finally, they did sort it out ... and it drove like a dream..

I understand from MBM that under no circumstances that the temp should go above 100.. it means that there could be a radiator leak (or at least that was what happenened in mycar)... which involves changing the entire radiator (and thus $$..). the older cars may have corrosion setting in which would explan the leak.

[Guest Mike]

yes wuyiche, u r right the temp shld be hovering ard 90 Deg C for

[Guest wuyiche]

bro 5725.. just curious .. have you done anything to your w124 yet..?

[Guest Mike]

ya i m curious wats wrong also =)