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  #1  
Old 08-04-2013, 12:32 PM
oldsinner111's Avatar
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w126 diesel 300sd

My oil line is starting to weep oil thru the line
,near cooler.I've heard these lines are awful to replace.You need special tools.
Can I make longer hoses and run them over the top,instead of stock ones under the engine? I'm wondering just leave old hoses in place.
Its hard for me to work under a car,and I'm on a fixed income,and can't afford mechanics

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Old 08-04-2013, 12:57 PM
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If there is room you can run longer Hoses. However, you will need to put the somewhere where rubbing won't wear through them.

Not sure about leaving the Old one in place. Perhaps they could be cut off.

Also none of the above decreases the Chance of stripping the Threads on the Oil Cooler Nipple. Hopefully that won't happen.

I have a W123 and I did not make that special Wrench like M Source sells. I used a big Crows Foot Wrench I bought on eBay. I bought or already had a Big Combination Wrench that size but did not have the Heart to cut it up to make the special Tool.

If the SD is like the W123 you need a 24mm with a thinned Head on the Oil Filter end to use as a backup on the Fittings in the Oil Filter Housing.
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Old 08-04-2013, 01:26 PM
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thanks man 26.00 sounds high for a wrench,but I'll see if a craftsman 1 1/16 wrench ground off will do?See I can have hoses made at O Reilly's is my thinking,M source wants $90 bucks a hose,and there supposed to be the best.
Now I have heard you can use new hose and hose clamps,will that hold?
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Old 08-04-2013, 02:04 PM
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You will find folks will perhaps be reluctant to encourage you to proceed with making new hoses and routing them differently since the price of failure is a ruined engine. I've never had an oil cooler hose go bad so far so cannot speak from experience about them or the alternatives to them.

With the higher quality of newer oils perhaps eliminating the cooler makes sense too.

Are you sure it is the hoses seeping and not a loose fitting somewhere?
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Old 08-04-2013, 02:19 PM
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well lets say for about 2 inches from oil cooler,the upper hose is shinny.I heard these can fail without warning so I'm being careful,and watching my pressure readings like a hawk.But is could be oil spraying from power steering pump.the top of pump look wet towards oil line
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Old 08-04-2013, 02:24 PM
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i need this car as backup,as my w140 needs alot of maintenice coming up.Need to do water pump,altenator,and brake flush. SD needs oil problem sorted out,and Idler arm bushing replaced. I swear my w126 30 years old in better shape than my w140.I put $2000 in parts on the old girl, before things break.
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Old 08-04-2013, 03:38 PM
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Quote:
Originally Posted by oldsinner111 View Post
well lets say for about 2 inches from oil cooler,the upper hose is shinny.I heard these can fail without warning so I'm being careful,and watching my pressure readings like a hawk.But is could be oil spraying from power steering pump.the top of pump look wet towards oil line
Clean everything off and drive for a couple of days to see if you can verify where the leak is coming from.

I also second checking the fittings. I thought my lower one was bad a few months after the motor was changed in my old 300sd. Turned out the shop had never tightened it down properly. When the tech put his fingers on it he was able to move the nut by hand.

Chances you can key off before damage is done, should the hose let go, are to my understanding pretty slim.
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Old 08-04-2013, 05:18 PM
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There is plenty of stuff on the Oil Cooler Hose alternatives below.

Repair Links
DIY Links by Parts Category - PeachParts Mercedes ShopForum
PeachPartsWiki: Do It Yourself Articles - Mercedes Vehicles
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Old 08-05-2013, 09:15 AM
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Quote:
Originally Posted by t walgamuth View Post
With the higher quality of newer oils perhaps eliminating the cooler makes sense too.
I saw few guys running without oil cooler on 300 n/a,no problems they state...but, I would be afraid to do so on a 300 turbo engine.

(I have one spare 300n/a oil cooler and that one has 3 rows less than mine
currently cooling 300 turbo...)

.
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Old 08-05-2013, 09:38 AM
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I'm not planning to run the cooler on my OM617-powered race truck - but it will run for a just a few minutes at a time. I had the bypass hose made at the local heavy equipment hose shop (the guys who make hoses for backhoes and the like). Some of the fittings are pretty pricey but way less than replacement M-B hoses. I used a narrow Vice Grip for the back-up wrench and an adjustable for the nut, but my engine was out of the car.

Dan

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