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 08-08-2016, 11:47 PM
Registered User
 
Join Date: Jul 2016
Posts: 121
Assistance needed in ID'ing a Heater Hose ('81 300D)

So...what exactly am I looking for online when I go to look for this oddball part (the hose that the red arrow is pointing to)? If you've seen my recent post regarding my (not so good) attempt at installing a manual heater bypass Pex valve in my '81 300D, I think the best thing to do would be to buy a second hose, check for proper fit, then cut the original and install the Pex valve somewhere in the middle. The second hose would be the "backup" newer hose to go to (if needed) once I've cut the original and attempted to splice in the Pex valve.

So far, locally, I've not gotten much help in finding some type of universal 5/8" bendable hose that won't kink, ergo my part ordering idea.

Attached Thumbnails
Assistance needed in ID'ing a Heater Hose ('81 300D)-heating-plumbing-driver-side-arrow.jpg  
Reply With Quote
  #2  
Old 08-09-2016, 02:50 PM
Registered User
 
Join Date: Aug 2010
Location: Sacramento, CA
Posts: 2,953
I re-plumbed our 2002 T&C minivan using 5/8" silicone heater hose. That was while converting to Evans Waterless coolant. Some turns were fairly tight but the hose didn't kink. That was my better stock w/ ~4 nylon plies which likes to stay round. Some 2-ply I used did want to kink in tight bends. Don't get me started on the Ace garden hose I spent $$$ for a few years ago that now kinks everywhere, cutting off the flow, but that is a home problem, back to cars.

I also used silicone hose in my two 300Ds' for the run from engine to passenger-side tube, replacing the evil and useless "aux water pump" in the process. That is a gradual curve and might be a better place to install your manual cut-off valve. One 1982-85 300D guy installed a 1986+ mono-valve there (extended wires), since they are cheaper and better. For that location, regular 5/8" heater hose might not work because one side is a bit larger, but the silicone hose is more flexible so easily slid over it. Also, silicone should last the life of your car. If the hose you show ever becomes unavailable, there is much pre-formed silicone heater hose marketed to tuners, though would have to search to find one w/ the needed bends, and also usually sold in a $60 set. Hot rodders often cut a radiator hose and rotate on a metal splice to realize the bends they need, which is another future option, and applies to you if you put the valve there. At least that hose is standard 5/8" ID.
__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans
Reply With Quote
  #3  
Old 08-09-2016, 07:14 PM
Registered User
 
Join Date: Jul 2016
Posts: 121
Appreciate the info, Bill. I've been "experimenting" with various locations of the Pex valve today, but still want to test further before I make a decision on where to try the install. My experimentation and decision will be posted in the next couple of days on my original "Monovalve" post. Regardless of where you choose to splice in, there really is no "straight hose" to easily adapt a manual valve to. Practically all the ideas involve the cutting, splicing and rotation that you mention. Perhaps a good reason why I've yet to see a post anywhere on the internet describing a complete DIY of bypassing the monovalve/heater control, or even real good pictures of it.

Again, I am experimenting, and will let folks know where I will attack this problem in the next few days on my "Monovalve" post.

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 09:27 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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