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
  #46  
Old 04-01-2018, 02:39 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by MongooseGA View Post
This isn't a bad idea. My fan does turn with ease by hand, what would I be looking for to tell if that's the case?

Fan clutches are cheap and easy, and with 300k+ on the car I think I'll go ahead and just do it anyway since I haven't in the 50k I've owned the car.
It is not supposed to turn easy by hand. It should slip some when accelerating at normal temperature so it uses less HP.

Make sure that the fins on the clutch are clean or the coupling may not get hot enough to work as it should. Also check if there is any looseness in the bearings when moving the fan with your fingers.

If this link works it will have the Viscofan description and testing. http://www.startekinfo.com/StarTek/outside/12265/disc_2/program/123avi2.htm

Last edited by My Stuff Owns Me; 04-01-2018 at 03:20 PM.
Reply With Quote
  #47  
Old 04-01-2018, 02:57 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by MongooseGA View Post
I see. So assuming the ambient temp isn't requisite of using the AC (just cool air blowing has been sufficient so far this year) then the engine shouldn't have any need to use the aux fan... Am I thinking this correctly? Furthermore, there would be no signal for the fan to ever turn on without the AC compressor engaging, right? Does anyone ever bypass and add in a manual on/off switch for it?

If that's the case, then I'd definitely have something wrong as I can't imagine I should be dealing with escalating temps when we're still in windows-down weather.
A manual switch can be installed in parallel with the refrigerant temperature switch located on the receiver/dryer. It is easy to attach because the switch has 1/4" spade connectors and there are adapters.
Reply With Quote
  #48  
Old 04-01-2018, 03:01 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by leathermang View Post
The wrong water coolant mix ratio can also eat through the heater core....
there is a test one can do with an OHM meter...

How do you use the ohm meter to do this?
Reply With Quote
  #49  
Old 04-01-2018, 03:23 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by MongooseGA View Post
Gotcha. So, in essence, patching that tiny leak alone could potentially have a positive impact on cooling efficiency.

Good to know!
The pressure will raise the boiling point. It will not make the engine run cooler.
Reply With Quote
  #50  
Old 04-01-2018, 03:27 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by MongooseGA View Post
Mount an over-flow and ditch the expansion tank altogether?

Well, now that I think about it... I guess that would work.

What's the point of an expansion tank vs overflow tank anyway?
The preferred thing would be to keep it original.

I think that the design intent of the overflow tank is to keep the system sealed. Less oxygen to the coolant means less rust.
Reply With Quote
  #51  
Old 04-01-2018, 03:35 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by MongooseGA View Post
I'm still undecided on the flush. I'm reluctant after reading stories of the flush ending up being detrimental, springing leaks etc. I know it only shows to point out an already-bad system but...

The car did fine yesterday. Operating temps stayed 85-90*, and when in rush hour traffic it came up to maybe the upper 90s. Seems like that's about spec for what these should be running.
A chemical flush is only necessary on abused systems or if you see a film of oil. When I flushed mine I disconnected the lower hose and a heater hose and flushed with plain water through a garden hose. There is a drain plug on the bottom of the engine.
Reply With Quote
  #52  
Old 04-01-2018, 06:20 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Quote:
Originally Posted by My Stuff Owns Me View Post
How do you use the ohm meter to do this?
Stick one end into the coolant and the other to the engine/chassis ground..
Reply With Quote
  #53  
Old 04-01-2018, 06:32 PM
Registered User
 
Join Date: Jan 2015
Posts: 265
I ended up going with a radiator/tank set up the same as OEM. The fans are all working properly as well; I can attest that the aux fan did continue running after shutting the engine down for a bit.

Temps were in great shape today. I drove it hard with the AC running, left her running, everything seems solved for now.
Reply With Quote
  #55  
Old 04-01-2018, 09:21 PM
Diseasel300's Avatar
Registered User
 
Join Date: May 2016
Location: Texas Hill Country
Posts: 4,138
Quote:
Originally Posted by leathermang View Post
Those Mercedes Engineers... sometimes they got it right.....LOL
Isn't that the truth? Amazing how correctly identifying and correctly remedying the problem can make something operate as intended.
__________________
'11 Honda Accord EX - "The Daily" 64K
'83 500SL Euro - "The Money Pit" 116K
'86 300SDL - "The Diseasel" 186K
The Diseasel Thread - Everything You Didn't Know You Wanted To Know
Reply With Quote
  #56  
Old 04-01-2018, 10:29 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Quote:
Originally Posted by Diseasel300 View Post
Isn't that the truth? Amazing how correctly identifying and correctly remedying the problem can make something operate as intended.
It would be interesting to know how much for each feature on our cars.. over the years...was spent in time and money on R and D.....
Reply With Quote
  #57  
Old 04-02-2018, 12:37 AM
Registered User
 
Join Date: Sep 2004
Posts: 8,556
Quote:
Originally Posted by My Stuff Owns Me View Post
The pressure will raise the boiling point. It will not make the engine run cooler.
If boiling doesn't have a negative affect on cooling, what's the point in raising the boiling point?
__________________
When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.
Reply With Quote
  #58  
Old 04-02-2018, 03:50 AM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Quote:
Originally Posted by My Stuff Owns Me View Post
The preferred thing would be to keep it original.

I think that the design intent of the overflow tank is to keep the system sealed. Less oxygen to the coolant means less rust.
Almost right. It is designed to keep the system sealed AND FULL even though the liquid expands when hot... and expel the air.....because liquid is a better transport medium of heat than air... and systems can have ' air pockets' like the burping required of many of our cars in order to fill the coolant system indicates.......
So all things considered.. like TangoFox007 said... avoiding boiling is critical to cooling the engine....
Reply With Quote
  #59  
Old 04-02-2018, 04:05 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by leathermang View Post
Stick one end into the coolant and the other to the engine/chassis ground..
Then what?
Reply With Quote
  #60  
Old 04-02-2018, 04:09 PM
Registered User
 
Join Date: Apr 2018
Posts: 22
Quote:
Originally Posted by tangofox007 View Post
If boiling doesn't have a negative affect on cooling, what's the point in raising the boiling point?

I stand by my statement. It is correct. Don't understand how you got your question from what I said.
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 07:02 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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