Welcome to mybenz | mysatisfaction !, Register here.. | Home | Directory | Events | Forum | Buy and Sell | Contact Us | Planet Mybenz  
Recent Forum Topics
Topic Replies/
Views
Last Post
Dynamic shock absorbers replacement 3/1402 2019/12/6 15:31 126208W
Flipkey replacement needed 0/287 2019/11/17 0:34 alvin488
W212 E-Classe Owners 74/16039 2019/11/16 6:54 raajz1205
How to activate Navi in W204 0/280 2019/11/14 16:42 MaN_MoRiNi
W211 aircond wshop 1/450 2019/11/5 19:16 JavaKajang
W124 E280 MP PArts and Maintenance 1/664 2019/10/18 17:35 ChrisG76
w210 SERVICE CENTER(CHEAP AND BEST) 1/838 2019/9/22 16:53 han
SRS LIGHT ON - 124 0/829 2019/9/10 16:05 skcsec
TT Session in Penang 2018 8/2915 2019/9/6 23:56 Golfer
W210 half cut Front Bumper 0/532 2019/9/5 17:30 dudelouv
Hello guys 0/566 2019/8/30 11:03 mal
W202 C220 1996 auto 0/921 2019/8/24 21:02 aridz1
GET TO KNOW : Our States Penghulu!! 84/20648 2019/8/23 16:42 Golfer
W212 windscreen replacement in JB 3/1610 2019/8/21 13:23 alexl
C200 W204 2011 Facelift - A personal review 260/45784 2019/8/14 5:50 enkil
1989 W124 300CE stalling while slowing down 1/1810 2019/7/21 12:27 rayray7279
190E 2.6 (Manual) 0/2085 2019/7/4 12:08 cossie_mozzie
Genuine Mercedes Benz E280 Masterpiece W124 (For Sale) 0/2626 2019/6/17 17:04 cossie_mozzie
Ideal engine transplant for 190E 2/2290 2019/6/14 9:56 cossie_mozzie
car idle and stall 5/1306 2019/6/11 22:48 Golfer
vibration on rev 1/2162 2019/5/15 21:00 Gan
Anyone knows what this button is? 3/3223 2019/5/15 18:42 Plinker
REPAIR MILEAGE METER - 124 MODEL 6/2457 2019/5/7 17:43 Plinker
Two Doors with or without tops Mercedes Members 214/41953 2019/4/11 14:55 126208W
Auxiliary fan brand recommendation 1/2403 2019/4/7 0:16 shiningstar
E300 HYBRID ( Blue tech) Diesel 0/2396 2019/3/26 22:44 SERVICOM
Groovy Sunshade Bulk Purchase 15/7735 2019/3/18 1:17 techjack
WHO R YOU? 334/52961 2019/3/4 14:01 benz-lover
Madeline 19/4654 2019/3/4 12:17 deezed
Kipas laju sedangkan temperature 80-95 0/2018 2019/2/26 15:54 adhary
Subwoofer W212 3/3841 2019/2/2 23:44 Mabel
Good Night... 165/25087 2019/1/12 0:51 Mabel
W211 Members 197/46043 2019/1/12 0:47 Mabel
Battery drain 3/3528 2019/1/12 0:46 Mabel
Rusty water 5/5201 2019/1/12 0:45 Mabel
W124 E220 Japan model engine misfirng and stalling 3/3698 2018/12/21 21:41 Mabel
What are the different classes in Mercedes Benz? 2/3539 2018/11/30 21:51 Mabel
GEAR BOX - W220 S280YEAR 2000 2/3601 2018/11/30 21:41 Mabel
Kereta bergegar dan menggigil bila idle atau slow 1/2866 2018/11/30 21:37 Mabel
Mabel 112/27918 2018/11/8 23:47 Mabel
Mabellina 59/35537 2018/11/8 23:42 Mabel
New member from Bandar Baru Uda JB 31/7560 2018/11/8 23:22 Mabel
Just being Malaysian 162/25735 2018/10/26 22:15 Mabel
Problem with My Rear Head Rest 1/3421 2018/10/26 22:09 Mabel
The 20,000 Club 2/4438 2018/10/12 22:57 Mabel
Extended warranty for hybrid battery 1/5312 2018/10/12 22:31 Mabel
Steering Box Leaking 3/5174 2018/10/12 22:30 Mabel
the 10,000 club 31/15562 2018/9/30 1:02 Mabel
W210 Members 362/85204 2018/9/30 0:45 Mabel
MYBENZ catch-up session 21st September 2018 MMZ BUKIT JELUTONG 8/6204 2018/9/30 0:21 Mabel
Login
Username:

Password:


Lost Password?

Register now!
Refine Search
Main Menu
Quick Access
Who's Online
25 user(s) are online (18 user(s) are browsing Forum)

Members: 0
Guests: 25

more...
Location and Benz Model
Please add your location and benz model by clicking on your "edit account" link . That way it will help other members to help you identifying your benz related problem or probably help locating nearest workshop for you .
Members vs Models
Vintage | A-Class | W123 | W124 | W126 | W140 | W201 | W202 | W203 | W210 | W211 | W220 | 
B-Class | M-Class | W204 | W221 | W212 | 2-Doors | R107 | R129 | R170 | R171 | R230
mybenz | mysatisfaction Forum Index
   W124 E,CE,D,TD Class
     Losing Coolant? Overheating? Check the thermostat
Register To Post

Threaded | Newest First Previous Topic | Next Topic | Bottom
Poster Thread
MB200E
Posted on: 2012/1/3 22:53
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Losing Coolant? Overheating? Check the thermostat
Just sharing my misadventure.
My W124 was running cold (temperature never exceeded 70degC). Checked at workshop and found the thermostat element missing - only left the housing.

Changed a new BEHR thermostat, now temperature slightly higher but still less than 80 degC on a hot day. Found out that a 71 degC rated thermostat was installed.

Bought a new 87 degC thermostat and changed it myself. Problem started. I could hear loud "tak tak tak" sound from the thermostat housing when engine hit 80 degC, and when driving off from cold the temperature would climb to 105degC before the aux fan cut in and temperature would drop and after a few times the temperature would be steady at 78degC even after long drive from JB to KL. Checked coolant expansion tank and level left half only.
MB200E
Posted on: 2012/1/3 22:58
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Re: Losing Coolant? Overheating? Check the thermostat
(sambungan)

Coolant expansion tank would lose level after each drive when I topped it up but level somehow would maintain at half and not dropping further.

The scary part of seeing the temperature gauge climb to 100-105 degC to activate the aux fan, and dropping back to sub-80 degC continued. Ditto the topping up of distilled water to coolant expansion tank. By then, I realised coolant was lost via overflow/overpressure release hose at expansion tank.

Did leak check at workshop, not conclusive. Shit, head gasket leaking? Dammit. Stopped topping up the expansion tank and lived with half-tank of coolant.. still it feels lousy seeing the needle climb to 105 degC.

--- to be sambung-ed

Mabel
Posted on: 2012/1/3 23:03
Benzo mania
Joined: 2007/8/7
From: Shah Alam, Cyber Jaya, Sunway
Posts: 20052
Benz Model: S320L, E240, C200
Message:
Re: Losing Coolant? Overheating? Check the thermostat
Thanks for sharing...

Here are 10 steps for your consideration to isolate the fault...


COOLANT LEAKS

There are a number of things that can go wrong with your car's cooling system, causing the engine to run warmer than it should. The following is a list of things that are easily checked at home by the do-it-yourselfer, and can always add to your knowledge of cars in general.

Step 1

Understand that overheating problems may be caused by a low coolant level, the radiator being plugged, the thermostat may be stuck, or other related common cooling system problems.

Step 2

Check the coolant level at the radiator overflow/plastic coolant reservoir tank to see if you're low on coolant.

Step 3
Open the radiator cap and look inside the radiator when the engine is cold.

Step 4
Fill the radiator with a 50/50 mix of antifreeze and water if it's empty or low, and close the cap.

Step 5
Look at both the lower and upper radiator hoses located at the top and bottom of the radiator on the back side and held by hose clamps. Make sure the hoses are securely clamped to the radiator and aren't leaking.

Step 6
Touch both the upper and lower radiator hoses when the engine is warm and the car turned off. They should both be somewhat warm. If one is cold, you may have a thermostat that's stuck closed.

Step 7
Use the palm of your hand to feel the outside of the radiator from top to bottom when the engine is warm and the car turned off. It should be warm to the touch evenly throughout. If there's a cold section, you may have a radiator that's internally blocked.

Step 8
Check under the car, inspect the radiator and look around the engine compartment for telltale signs of a coolant leak: Coolant is usually greenish, slippery and sweet-smelling.

Step 9
If there is always a puddle of coolant under your car it could be due to water pump failure, or a cracked coolant reservoir.

Step 10
Visit your mechanic if you know there's a leak but can't find it. A mechanic can detect a slow or small coolant leak by pressurizing the cooling system.


----------------
Cheers/Mabel

Nothing great was ever achieved without enthusiasm
Take time to read. It is the fountain of wisdom
Membership Number: One Nine Seven Seven

MB200E
Posted on: 2012/1/3 23:07
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Re: Losing Coolant? Overheating? Check the thermostat
sambungan-

Yesterday, decided to undo my last modification by installing back the 71 degC BEHR thermostat. Voila, no more symptoms of overheating and lost coolant.

Tested the 87 degC original Waller (spelling) thermostat by soaking in hot water in a pot. Realised it does not open even when the water was boiling.

Ha, now I know the "tak tak" sound was emitted when the temperature was high and it tried to force the thermostat to open. Once it opens up (at > 100degC), it remains at full open position and this explains why the temperature drops like a rock after it hits a high. The temperature rise was not caused by air lock in radiator as I thought.

When the thermostat suddenly opens up at > 100degC, it allowed full bore of water through the breather tube that is fixed to expansion tank and overpressures the expansion tank and the pressure is released via the overflow hose.

This mistake has cost me:
1) Six bottles of original Merc coolant
2) petrol used to keep the car idling during troubleshooting sessions
3) Endless sleepless nights worrying about whether I have damaged the head gasket and why I kept losing coolant and almost overheating the engine.

4) A useless 87 degC original thermostat which I'm trying to get a replacement from the shop.

Mabel
Posted on: 2012/1/3 23:11
Benzo mania
Joined: 2007/8/7
From: Shah Alam, Cyber Jaya, Sunway
Posts: 20052
Benz Model: S320L, E240, C200
Message:
Re: Losing Coolant? Overheating? Check the thermostat
...I see...thanks for sharing MB200E...

Glad you managed to overcome the fault..


----------------
Cheers/Mabel

Nothing great was ever achieved without enthusiasm
Take time to read. It is the fountain of wisdom
Membership Number: One Nine Seven Seven

Ashok
Posted on: 2012/1/3 23:17
Home away from home
Joined: 2011/5/14
From: Batu Caves- House of Lord Muruga
Posts: 636
Benz Model: W210 -E230 Manual-
Message:
Re: Losing Coolant? Overheating? Check the thermostat
MB200E, glad you berjaya but success never comes free.

Who says you can get a free lunch?
MB200E
Posted on: 2012/1/3 23:25
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Re: Losing Coolant? Overheating? Check the thermostat
The original Merc thermostat made by Wahler


MB200E
Posted on: 2012/1/3 23:26
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Re: Losing Coolant? Overheating? Check the thermostat
The 71 degC thermostat by BEHR


MB200E
Posted on: 2012/1/3 23:28
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Re: Losing Coolant? Overheating? Check the thermostat
Comparison. L=Wahler, R=BEHR. They look different. One is fail open and the other fail close?

MB200E
Posted on: 2012/1/3 23:34
Just can't stay away
Joined: 2011/4/3
From: Kiasuland and Bolehland
Posts: 77
Benz Model: 1993 W124 200E 16V
Message:
Re: Losing Coolant? Overheating? Check the thermostat
My family members still do not understand why I make myself sibuk by owning this old car. They think I should just get an Altis or Camry and be free of the misery of changing this and that and getting my hands dirty

Truth be told, I didn't know cars have coolant thermostat until this incident. And I am getting worried of turning into petrol head: this explains why I found it compelling to take photographs of the thermostats during the swopping over.

(1) 2 3 »
Threaded | Newest First Previous Topic | Next Topic | Top

Register To Post