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1972 350SL
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6 Posts
Discussion Starter #1
Hello, I am redoing my cooling system and while I am at it, it looks like I should go ahead and replace the oil cooler hoses.

I am completely stumped on how I would remove the lower hose. There is no space for
a wrench or crows foot back there. I don't want to remove anything I don't have to.

I also couldn't find anything helpful in the shop manual. Any tips?

My car is a 1972 350 SL. (purchased brand new by my father :grin)
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,459 Posts
Hello, I am redoing my cooling system and while I am at it, it looks like I should go ahead and replace the oil cooler hoses.

I am completely stumped on how I would remove the lower hose. There is no space for
a wrench or crows foot back there. I don't want to remove anything I don't have to.

I also couldn't find anything helpful in the shop manual. Any tips?

My car is a 1972 350 SL. (purchased brand new by my father :grin)
I had a look at my car.

The lower oil cooler hose seems easy enough to get at both ends.

The upper hose does feed back, transitions to a solid tube, and connects just in front of the oil filter housing. That one would be tight to remove.

I have not removed mine, but others may have. Some have installed a bypass and eliminated the oil cooler (hard to find replacements).
 

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Registered
1972 350SL
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6 Posts
Discussion Starter #3
I had a look at my car.

The lower oil cooler hose seems easy enough to get at both ends.

The upper hose does feed back, transitions to a solid tube, and connects just in front of the oil filter housing. That one would be tight to remove.

I have not removed mine, but others may have. Some have installed a bypass and eliminated the oil cooler (hard to find replacements).
Yes, you are right. It is the upper hose actually. Do I remove the oil filter housing? That also doesn't look easy to remove either.

I had the oil cooler cleaned out and I don't want to bypass it. The hoses look fine but at 44 years old, I don't trust them.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,488 Posts
Removing the filter is fairly easy. The worst part is you will spill some oil so a catch pan is a good idea. Gloves and rags too. Crawl under with 17MM socket, ratchet and and a few extensions. It will be obvious.
 

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1972 350SL
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6 Posts
Discussion Starter #5
Removing the filter is fairly easy. The worst part is you will spill some oil so a catch pan is a good idea. Gloves and rags too. Crawl under with 17MM socket, ratchet and and a few extensions. It will be obvious.
Thank you.

Has anyone ever replaced the hoses? I would appreciate any additional help.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,459 Posts
Removing the filter is fairly easy. The worst part is you will spill some oil so a catch pan is a good idea. Gloves and rags too. Crawl under with 17MM socket, ratchet and and a few extensions. It will be obvious.
Rowdie,
I found your post that said that the 72 and 73 had different connections sizes. That is interesting! Does that show up in EPC part numbers?

http://www.benzworld.org/forums/r-c107-sl-slc-class/1430417-1973-450sl-need-new-oil-cooler-2.html#post3357637
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,488 Posts
Rowdie,
I found your post that said that the 72 and 73 had different connections sizes. That is interesting! Does that show up in EPC part numbers?

http://www.benzworld.org/forums/r-c107-sl-slc-class/1430417-1973-450sl-need-new-oil-cooler-2.html#post3357637
The EPC does show different part numbers for cooler and hoses. Cooler cutoff is by chassis number, hoses by engine number.

I haven't commented about removal because it was ten years ago and it was done with engines removed.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,459 Posts
The EPC does show different part numbers for cooler and hoses. Cooler cutoff is by chassis number, hoses by engine number.
Thanks! (My EPC is not working). It would then be important to provide engine number get right part. If I ever change hoses, something to remember!
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,459 Posts
What's wrong with it?
Long story! :

In January, computer crashed and I had to re-install everything
Was in SC, so never got around to EPC/WIS
When I got home, found 2014 version dvds would not work
Tried cleaning DVDs and drive, but still no dice
Bought download 2018 version off eBay.
Files were way too large to download. Had to cancel to preserve some GB (we are not unlimited). The installation was also much more complex than the previous Win XP VM ones. Cancelled that.
Vendor was good and sent me just EPC part of 2014 version and walked me through the installation.
But now that no longer works. Not sure why.

Probably need to buy another set. Ideally on USB stick so no problems reading dvds and no super large files to download.
 

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Registered
1972 350SL
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6 Posts
Discussion Starter #12
Thanks for the replies. I am sure I can get it off with a crows foot with the alternator and oil filter housing out of the way. I have another question though, hopefully somebody can help-

What is this part that the hoses go into? Is it a thermostat? Should I rebuild or replace at this point? What is the part number? I can't seem to find any info.

See attachment.
 

Attachments

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Registered
1972 350SL
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6 Posts
Discussion Starter #15 (Edited)
Ok so I ordered what I thought were the right oil cooler hoses for my car but they have larger fittings... 116-187-09-82 & 116-187-10-82

Does anybody know the correct part numbers for a 1972 350 SL?
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,488 Posts
07 82 and 08 82 up to engine number 008437. That is for a 350SL 4.5 engine.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,459 Posts
Decided to resurrect this thread. I posted about this in another thread, but this is a better place! Some new posts there too: Oil Cooler - Probably as stupid question.

I am just where speedmeister was earlier. Both hoses show signs of weeping from the swaged fittings. If speedmeister is still here, how about an update?

Ideally, I would like to get that rear union nut off without removing the filter housing. Otherwise, it is too much work on back for this 80-something. I would have to get a shop to do it.

Realize not many here would have done it. But those in Europe would have, seeing they mostly do have oil coolers. Wonder if W116 or other Benzes have same issue?

2638711
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,459 Posts
Have located new hoses in Canada as well as in Germany and UK. Prices are kinda high! Over $300 by time freight and taxes are in. Twice as much as much as the longer and more complex ones on my W123.

I need to do a trial run on removing those nuts! Maybe I should just live with the small leaks? Just don't want those swages popping off!
 

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1998 ML320, 1975 280C
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157 Posts
Pull the hoses and take them to a local hydrolic(sp) shop. They can make up ANY hose, and should be able to match them. I had all new brake lines made for an old motorcycle. Total cost was about $250 US for four hoses, with DOT approved fittings, etc.
 

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Premium Member
1983 380 SL
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3,032 Posts
Pull the hoses and take them to a local hydrolic(sp) shop. They can make up ANY hose, and should be able to match them. I had all new brake lines made for an old motorcycle. Total cost was about $250 US for four hoses, with DOT approved fittings, etc.
I was about to say the same thing. When I need new hoses for my loader I go to a local hydraulic shop and they make them up for me for a fraction of what the manufacturer of my loader charge.
 
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