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-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 10-20-2004, 04:24 PM
Registered User
Join Date: Jul 2004
Location: Portland, OR
Posts: 6
190E Apparent Loss of Coolant

86 190E 16V with a 148k. Late spring I had all the fluids changed in the car, including the coolant. Over the summer, there did not appear to be any loss of coolant. Last week, the low coolant light came on while I was driving, then subsequently went off a few minutes later. Coincidentally, it was also the first time that the outside temp was in the high 40's, low 50's so the heater was on.When I checked the level, it was just above the sensor. I topped it off and began to check for any obvious leaks from hoses or connections. I did not find any, nor does it appear to be leaking from the heater core (no steaming of windows, no smell of antifreeze, no wet carpet.) I have looked at the exhaust and it is not white.

I have driven it since I topped off the fluid and it has not leaked since. I let it idle till the fan cycled on just to make sure it got into operating temps.

I plan to have the system pressure checked, but if anyone has any insights I would appreciate it.


86 190E 16V

Reply With Quote
Old 10-20-2004, 06:00 PM
J.HIDALGO's Avatar
Registered User
Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
How old is the coolant reservoir cap?

Did you check the overflow tank? They sell a dye in NAPA that you can add to the coolant and will show any leaks with a "black" light.
'86 300E
Reply With Quote
Old 10-20-2004, 07:25 PM
Registered User
Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
If the monovalve has been closed all this time (unlikely), you could simply have air in the heater core.

That engine is notorious for not filling completely unless you work at it, so I'm not surprised you are low after running the heater some. Did you get gurgling sounds in the dash? If so, definitely air in the heater core working out.

I'd also replace the pressure cap if not done recently, they go bad and allow coolant to burp out into the overflow tank under the fender.

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
Reply With Quote
Old 10-21-2004, 12:06 PM
Registered User
Join Date: Jul 2004
Location: Portland, OR
Posts: 6
Thanks for the tips. I'll check out the expansion tank as well as the cap.

86 16V

Reply With Quote


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

All times are GMT -4. The time now is 05:53 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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