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 01-02-2010, 04:50 PM
BodhiBenz1987's Avatar
Registered User
 
Join Date: Dec 2004
Location: East Coast
Posts: 3,005
Question about trans cooler lines and cleanliness

My 87 300D is leaking ATF from both sides of the trans cooler lines. It's fairly mild and consists only of a couple drops after the car has been parked. The lines leak out of the connections that sit on either side of the oil pan, and as far as I can see, nowhere else. I haven't driven the car a lot lately so I'm going to see how it progresses once I get it back on the road (needs brakes done). My question is this: I have a spare set of transmission cooler lines that came out of a 1988 300E, and I think they are exactly the same as mine. If I decide to replace them, should I do anything to "sterilize" the replacement lines? I know even the slightest micro-crumb of lint, dirt, etc., can terminate the transmission, so I'm very paranoid about that. These spare lines have been sitting in a dusty shed. It's not something I'm going to do at this time, but I'm just asking as a hypothetical, because having a plan of action for potential future problems helps me overcome my constant worrying (something I'd like to address in 2010). I'm just curious what the path of the ATF through those lines is, i.e., would a particle in one of the lines get caught in the filter. I don't have the FSM for the trans, just the chassis/body.
__________________
1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--369,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--14,500 miles
1995 S320, black/parchment--34,000 miles (Dad's car)
Reply With Quote
  #2  
Old 01-02-2010, 05:56 PM
Biodiesel300TD's Avatar
|3iodiesel300T|)
 
Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
I'd hose them out with brake cleaner, then make sure they dry out and dump good clean ATF through them. Then they should be clear of any debris and gunk.
__________________
Andrew
'04 Jetta TDI Wagon
'82 300TD ~ Winnie ~ Sold
'77 300D ~ Sold
Reply With Quote
  #3  
Old 01-02-2010, 06:58 PM
Registered User
 
Join Date: Nov 2006
Location: jersey
Posts: 188
Path of fluid --- one is the pressure from the torque convertor return fluid flow going to be cooled

the other is the of corse the return and it just dumps into the trans pan < the filter in the pan is the catcher of all this sort of debris

if it is a keep you up at night thing and it should not be - its not a human body and we all know they leave screwdrivers in them

i would replace the lines first - run the car 1/2 hour and than change the oil in pan with a new filter and do the convertor -- its the way i would do it -- jz
Reply With Quote
  #4  
Old 01-02-2010, 07:16 PM
blackestate's Avatar
Registered User
 
Join Date: Aug 2005
Location: Washington State
Posts: 948
Could it just be a missing or dammaged washer on the Banjo bolt? do they still use that set up on yours?
__________________
83 300SD Dark Silver Dark brown inside
Reply With Quote
  #5  
Old 01-02-2010, 08:49 PM
Registered User
 
Join Date: Sep 2004
Posts: 8,653
Quote:
Originally Posted by johnjzjz View Post

i would replace the lines first - run the car 1/2 hour and than change the oil in pan with a new filter and do the convertor -- its the way i would do it -- jz
I would clean the lines before I installed them. If the lines were so contaminated that a fluid and filter change is in order, they most definitely should not be installed.
Reply With Quote
  #6  
Old 01-02-2010, 08:54 PM
BodhiBenz1987's Avatar
Registered User
 
Join Date: Dec 2004
Location: East Coast
Posts: 3,005
Quote:
Originally Posted by tangofox007 View Post
I would clean the lines before I installed them. If the lines were so contaminated that a fluid and filter change is in order, they most definitely should not be installed.
That was kind of my thinking ... I'd rather go to the effort of cleaning them, or even shell out for new ones, than create a new, bigger problem.
__________________
1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--369,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--14,500 miles
1995 S320, black/parchment--34,000 miles (Dad's car)
Reply With Quote
  #7  
Old 01-02-2010, 09:06 PM
layback40's Avatar
Not Banned
 
Join Date: Nov 2009
Location: Victoria Australia - down under!!
Posts: 4,023
Those lines are barely a year newer than the old leaky ones. You will be very p*^#* off if you install them and in a couple of weeks they leak too!! New ones are the go!!
__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
Reply With Quote
  #8  
Old 01-02-2010, 09:41 PM
Yak Yak is offline
Registered User
 
Join Date: Aug 2009
Location: San Antonio, TX
Posts: 1,711
My tranny cooler lines weren't leaking at all, then the temps dropped, then I got the same thing you described: a few drops at the connection between the hard line and the nut on the flex hose. I just tighted the line a bit and the leak stopped.

The hard line fitting on my 300CD is some odd size, neither metric nor standard. I ended up using a large crescent wrench.

If you're going to replace, get new lines. 20+ year old used lines wouldn't be worth the labor to re-install them.
Reply With Quote
  #9  
Old 01-02-2010, 09:47 PM
daw_two's Avatar
diesel enthusiast
 
Join Date: Jan 2007
Location: Germantown, TN
Posts: 5,437
Quote:
Originally Posted by Yak View Post

If you're going to replace, get new lines. 20+ year old used lines wouldn't be worth the labor to re-install them.
X2 --- on what Yak said.

One of my latest orders to Phil included 8 transmission cooler lines. Yes, I said 8. I've owned enough of these old MB diesels to know that the next one I buy is going to need the lines replaced.
__________________
daw_two
Germantown, TN

Links:
Current Car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more
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 11:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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