190e Leaking Coolant From this..... - Mercedes-Benz Forum

Go Back   Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W201 190 Class
New User? Register - Forgot Password

BenzWorld.org is the premier Mercedes-Benz Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 01-09-2013, 10:08 AM   #1 (permalink)
BenzWorld Member
 
Date registered: Sep 2009
Vehicle: '91 Merc 190E 2.3
Location: London, ON Canada
Posts: 222
Question 190e Leaking Coolant From this.....

Vehicle: 1991 Mercedes 190E 2.3

The engine is always running hot (halfway between 80 and 120 mark -- normally it is at 80). I checked the coolant level and it was near empty. I brought the car into my home garage to check for leaks and crawling around underneath the radiator area / fanbelt area i saw this:





The leak appears to be coming from the red arrow area, a small tube hole. How weird. Did some tube fall off / get pulled off?

What is that area and how the heck do i properly plug it up, that is if there is a missing tube where do i connect it back?

NOTE: Normally the vehicle has a large plastic shield beneath the entire front area to block the road debris from the radiator, fan, engine, etc. This shield was removed a couple months back and forgotten to be replaced.


As always THANK YOU for the education.
quantass is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-09-2013, 10:36 AM   #2 (permalink)
BenzWorld Elite
 
Check Codes's Avatar
 
Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Posts: 28,539
That appears to be the weep hole for the water pump, it's letting you know that the internal seal has failed (absent the weep hole the hot coolant would instead very quickly flush the lubricant from the bearing, causing it to seize, and perhaps catastrophically.

Replace the pump, that's your solution.

Good luck.
__________________
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)
Check Codes is offline   Reply With Quote
Old 01-09-2013, 10:43 AM   #3 (permalink)
BenzWorld Elite
 
slk230red's Avatar
 
Date registered: Mar 2004
Vehicle: '01 SLK230,'93 190E 2.3, 1971 LS5 Corvette Convertible
Location: Tampa, FL
Posts: 1,872
It came from the factory with a rubber hose connected to that fitting and it pointed down to the plastic pan.
Your water pump seal is leaking and needs to be replaced. It's easy on the 2.3.

Good luck,

Dave
slk230red is offline   Reply With Quote
Old 01-09-2013, 04:11 PM   #4 (permalink)
BenzWorld Member
 
Date registered: Sep 2009
Vehicle: '91 Merc 190E 2.3
Location: London, ON Canada
Posts: 222
Question

Whew, thanks so much guys.

So to be clear the weep hole is fine being open however the issue is with the water pump seal.

Do i need to replace the entire water pump or do i replace the seal of the water pump?

Thanks so much.
quantass is offline   Reply With Quote
Old 01-09-2013, 06:34 PM   #5 (permalink)
BenzWorld Extremist
 
JacobB.'s Avatar
 
Date registered: Mar 2011
Vehicle: 2000 C230 Kompressor, 2005 Volvo S60 T5 AWD, 1992 190E 2.3 -Totaled
Location: Massachusetts
Posts: 948
No, only replacing the seal is necessary, but while its out, do check the water pump for any play or bearing noise. Might as well replace it while you have it out, then have to take everything apart again to replace that.
__________________
1992 190E 2.3
2000 Volvo S70 2.4 GLT SE *SOLD*
2005 Volvo S60 2.5 T5 AWD
JacobB. is offline   Reply With Quote
Old 01-10-2013, 03:00 AM   #6 (permalink)
BenzWorld Senior Member
 
Date registered: Nov 2002
Vehicle: 1993 190e-2.3
Location: Birdsboro, PA
Posts: 518
Consider a new belt and tensioner assy while everythings apart. I've never had good luck reusing the tensioner.
Ignatz is offline   Reply With Quote
Old 04-15-2013, 01:38 AM   #7 (permalink)
BenzWorld Member
 
Date registered: Nov 2012
Vehicle: 85 190E eurobenz, 2.0L 4sp manual. sick and hiding in the trees
Posts: 88
new pump. and only new pump. there has to be a vent between the bearing and the shaft bushing . the shaft is supported on each end and allowed to be spun on the bearing and bushing. the coolant seal weeps on every pump to lubricate the lip seal. hence, (weep hole) the field term for this vent hole. it should not drip and keep dripping. also, if there was no vent, the pressure from the shaft cavity would push against and eventually overcome the seal. the bearing allows the shaft to be loaded by accessories and resulting belt tension. the bushing guides and supports the other end of the shaft. And when u r through, put the lower cover back on so the air will cool the radiator and not get under, up and in. this is your MOTHER!!!!!
190Erur rur is offline   Reply With Quote
Old 04-15-2013, 04:40 AM   #8 (permalink)
Lifetime Premium Member
 
lomtevas's Avatar
 
Date registered: Nov 2006
Vehicle: 1986 190E 2.3-16, 1992 190E 2.3 and 1993 300CE
Location: new york city
Posts: 1,982
Lifetime Premium Member
Send a message via Skype™ to lomtevas
I agree that you are looking at a seal failure (leakage from the lower vent from the pump bearing housing) which will lead to a loss of the pump. If you do not replace the pump now, that little leak will become a torrent of coolant. That's the pump's way of saying "I quit" by making a huge mess before you overheat your motor.

The entire pump has to be replaced. Go to the dealer with the old one (as a core replacement) and buy a new one or a rebuild. There may or may not be a kit needed for fittings depending on your model year.

Remove the fan shroud, serpentine belt, fan, bypass hose, upper radiator hose and the bolts that attach the pump to the engine front cover. Replace the pump and reinstall everything in reverse order. I use a gasket and a compound to ensure a seal between the pump and the engine front cover though I know many owners use no compound.
__________________
The home of the two 201's.
lomtevas is offline   Reply With Quote
Old 04-15-2013, 07:09 AM   #9 (permalink)
BenzWorld Junior Member
 
KamelReds's Avatar
 
Date registered: Oct 2012
Vehicle: 91 190E 2.3
Location: E$$J
Posts: 28
Quote:
Originally Posted by lomtevas View Post
I agree that you are looking at a seal failure (leakage from the lower vent from the pump bearing housing) which will lead to a loss of the pump. If you do not replace the pump now, that little leak will become a torrent of coolant. That's the pump's way of saying "I quit" by making a huge mess before you overheat your motor.

The entire pump has to be replaced. Go to the dealer with the old one (as a core replacement) and buy a new one or a rebuild. There may or may not be a kit needed for fittings depending on your model year.

Remove the fan shroud, serpentine belt, fan, bypass hose, upper radiator hose and the bolts that attach the pump to the engine front cover. Replace the pump and reinstall everything in reverse order. I use a gasket and a compound to ensure a seal between the pump and the engine front cover though I know many owners use no compound.

this guy will always say buy dealer parts!
well do not do it!
Unless you have 16v its NOT WORTH IT!
IMO buy from
Autohausaz.com
__________________
KamelReds is offline   Reply With Quote
Old 04-15-2013, 09:18 AM   #10 (permalink)
BenzWorld Elite
 
hamada128's Avatar
 
Date registered: Jan 2007
Vehicle: 93 190E 2.3, 94 E320 (sold), 01 E320
Location: NJ, USA
Posts: 2,920
Or you can order from parts.com which sells OEM dealer parts at discounted prices sometimes cheaper than other websites.
hamada128 is offline   Reply With Quote
Reply

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W201 190 Class

Bookmarks



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 11:34 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.1

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.