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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-30-2008, 05:41 PM
blackestate's Avatar
Registered User
 
Join Date: Aug 2005
Location: Washington State
Posts: 948
thermostat leak

Changed the thermostat. Got a new o-ring gasket and all. And it leaks. PO had used silicone, Spent a long time cleaning it up.

What else can I do? It looks like the o-ring that fits around the t-stat is the only seal in there?

thanks
Doug

__________________
83 300SD Dark Silver Dark brown inside
Reply With Quote
  #2  
Old 01-30-2008, 05:59 PM
Registered User
 
Join Date: Apr 2005
Location: Northern NY
Posts: 364
The o-ring is, and should be, the only seal needed. Check for a silicone goober you might have missed or perhaps the o-ring slipped out of its groove and got pinched during assembly.

Good luck,
Jim
__________________
2005 C240 4matic wagon (daily driver)
87 190D - 225K (on loan)
85 190D - 312K (on loan)
2011 Subaru Legacy AWD (Wife's)
Reply With Quote
  #3  
Old 01-30-2008, 06:54 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Quote:
Originally Posted by jaoneill View Post
The o-ring is, and should be, the only seal needed. Check for a silicone goober you might have missed or perhaps the o-ring slipped out of its groove and got pinched during assembly.

Good luck,
Jim
Agreed, make sure you don't have a hose leaking fluid down, to fool you into thinking the leak is elsewhere. Good luck.
Attached Thumbnails
thermostat leak-parts-102.jpg  
__________________
83 SD

84 CD

Last edited by toomany MBZ; 01-30-2008 at 07:04 PM. Reason: more info
Reply With Quote
  #4  
Old 01-30-2008, 10:12 PM
tankowner's Avatar
You talkin’ to me?
 
Join Date: Dec 2007
Location: Columbia, MO
Posts: 907
I honestly don't know what the set up is in your model; however, when I changed out my t-stat and gasket last month I ran into the following problem. Went to the parts place and they said they had the parts for my model - I bought them, got home took everthing apart, dug out the old stat and gasket only to find that not only did I not get the right stat, I also got the wrong gasket. What I was given was an o-ring, but that is not what I needed. What was needed was gasket that fit around the outside rim of the stat. I had to reorder elsewhere and wait four days to get it. Anyway, like I said defer to someone else who knows your model, but on mine, it doesn't take an "o-ring" in the strictest sense, but rather a rubber seal.
__________________
'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
______________________________________

"Back off, man. I’m a scientist” ~ Peter Venkman
Reply With Quote
  #5  
Old 01-31-2008, 06:56 AM
Registered User
 
Join Date: Dec 2004
Location: Nashua, NH
Posts: 3,956
Quote:
Originally Posted by tankowner View Post
I honestly don't know what the set up is in your model; however, when I changed out my t-stat and gasket last month I ran into the following problem. Went to the parts place and they said they had the parts for my model - I bought them, got home took everthing apart, dug out the old stat and gasket only to find that not only did I not get the right stat, I also got the wrong gasket. What I was given was an o-ring, but that is not what I needed. What was needed was gasket that fit around the outside rim of the stat. I had to reorder elsewhere and wait four days to get it. Anyway, like I said defer to someone else who knows your model, but on mine, it doesn't take an "o-ring" in the strictest sense, but rather a rubber seal.
Tankowner is correct. I know from my own experience that NAPA will routinely sell you an o-ring when you really need a gasket which fits around the entire edge of the t-stat. The solution is easy...buy your replacement t-stat from the dealer. Believe it or not I have found over the years that t-stats are cheaper from M-B than they are from NAPA and you also have the added benefit of actually getting the CORRECT part.
__________________
Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz
Reply With Quote
  #6  
Old 02-01-2008, 12:11 AM
blackestate's Avatar
Registered User
 
Join Date: Aug 2005
Location: Washington State
Posts: 948
got my gasket here on this site. So it should be the correct one. Also looks like the one that came out.
I will try gain this weekend.
__________________
83 300SD Dark Silver Dark brown inside
Reply With Quote
  #7  
Old 02-01-2008, 02:16 AM
tankowner's Avatar
You talkin’ to me?
 
Join Date: Dec 2007
Location: Columbia, MO
Posts: 907

[IMG]https://www.***************/secure/PartImages/6172001815.jpg[/IMG]

Again, I don't know the model. However, the picture in the link shows a possible two seals - one looks to go around the stat and the other an o-ring. The description states that both are now included to account for both early and late models. Dunno if that helps.
__________________
'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
______________________________________

"Back off, man. I’m a scientist” ~ Peter Venkman
Reply With Quote
  #8  
Old 02-01-2008, 03:23 AM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Quote:
Originally Posted by tankowner View Post

Again, I don't know the model. However, the picture in the link shows a possible two seals - one looks to go around the stat and the other an o-ring. The description states that both are now included to account for both early and late models. Dunno if that helps.
I think the gaskets are for the surround, and housing, just in case you're not sure of what you need.
But ya never know.
__________________
83 SD

84 CD
Reply With Quote
  #9  
Old 02-01-2008, 01:22 PM
blackestate's Avatar
Registered User
 
Join Date: Aug 2005
Location: Washington State
Posts: 948
I have both of those, But only used the one that fastens to the t-stat. Do I need the other one? Napa's also comes with a seal, almost like a wheel seal?
__________________
83 300SD Dark Silver Dark brown inside
Reply With Quote
  #10  
Old 02-01-2008, 03:05 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Quote:
Originally Posted by blackestate View Post
I have both of those, But only used the one that fastens to the t-stat. Do I need the other one? No, that is for the housing to the engine, I think. Napa's also comes with a seal, almost like a wheel seal?
Should not need that either. I used only the gasket that aroung the t'stat itself, no leaks.
__________________
83 SD

84 CD
Reply With Quote
  #11  
Old 02-01-2008, 08:48 PM
Registered User
 
Join Date: Oct 2007
Location: Oregon
Posts: 2
thermo

Check the thermostat housing and the hose in the middle of that mess.


Quote:
Originally Posted by blackestate View Post
Changed the thermostat. Got a new o-ring gasket and all. And it leaks. PO had used silicone, Spent a long time cleaning it up.

What else can I do? It looks like the o-ring that fits around the t-stat is the only seal in there?

thanks
Doug
Reply With Quote
  #12  
Old 02-01-2008, 11:24 PM
whunter's Avatar
Moderator
 
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,416
We can beat that price + you support the forum

Quote:
Originally Posted by tankowner View Post
[IMG]https://www.**********.com/secure/PartImages/6172001815.jpg[/IMG]

Again, I don't know the model. However, the picture in the link shows a possible two seals - one looks to go around the stat and the other an o-ring. The description states that both are now included to account for both early and late models. Dunno if that helps.
We can beat that price + you support the forum

MB# 617 200 18 15

Item Number: 6172001815
Main Category: MERCEDES BENZ
Sub Category: Engine Cooling System
Description: THERMOSTAT, All OM617 Turbo Diesel *80 DEG*
Weight: 0.300


FOR PARTS SALES CONTACT:
__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Last edited by whunter; 09-28-2010 at 12:37 AM.
Reply With Quote
  #13  
Old 02-01-2008, 11:31 PM
tankowner's Avatar
You talkin’ to me?
 
Join Date: Dec 2007
Location: Columbia, MO
Posts: 907
Absolutely. Always better to buy here! Just posting the pic to help illustrate the possiblities.
__________________
'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
______________________________________

"Back off, man. I’m a scientist” ~ Peter Venkman

Last edited by whunter; 09-28-2010 at 12:38 AM.
Reply With Quote
  #14  
Old 02-01-2008, 11:43 PM
MBeige's Avatar
Registered User
 
Join Date: Apr 2005
Location: SoCal
Posts: 3,746
Are you sure you installed it the correct way?
Reply With Quote
  #15  
Old 02-02-2008, 04:19 PM
blackestate's Avatar
Registered User
 
Join Date: Aug 2005
Location: Washington State
Posts: 948
t-stat is in the correct way, I did not see a direction on the gasket.
The housing is dripping onto the lower hose right under the t-stat seal.
Snowing today. See how it goes Monday...

__________________
83 300SD Dark Silver Dark brown inside
Reply With Quote
Reply

Bookmarks

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 06:20 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page