I am in need of a new oil thermostat for inside my oil filter housing that controls oil flow to the cooler. Any sources? Can't seem to find one except through the dealer. Also, has anyone ever performed this job? I have the filter housing removed and am in need of the special two pronged socket to get the t-stat out. Does anyone have one or know of a source for one? I'll post pics of what I'm talking about later.

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1983 300CDT -- 177K

I'd be inclined to just pick up a complete oil filter housing at the junk yard and stick it on. It's $13 at the local yard here. They don't go out that often.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

No diesels locally –– KC or STL –– when I checked a couple weeks ago. Maybe that's changed. $13 you say? I may call around.

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1983 300CDT -- 177K

What are your symptoms? I've been on this forum for 10 years and have never seen a post about a failed oil thermostat before.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Yeah, still nothing locally. There's a considerable dearth of old Benz's in the yards around here, though I know several local w123 owners, highly doubt however, any of the local owners got a spare filter housing lying around.

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1983 300CDT -- 177K

Curious, how did you diagnose?

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

Easy to diagnose; just drive your Car a resonable amount of time and if one Oil Cooler Hose does not get hotter than the other that is the Issue.

If you have one you could use one of those Infared Thermometers that you Point but they are not real accurate.

However, I Winter may not be the bast time to test for that.

There is a few threads on the subject.


I the last thread that I read the Person took a straight Punch side ways but in one of the Ring Holes and tapped the Retaining Ring Counter Clockwise and that was enough to turn the Ring even with the ring staked in place.

The retainer is the one with the 2 round holes

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel

X2.

Never opened up even after 300 mile drives in the summer with AC. Hoses never got warm, let alone hot. It's been broke since before summer and I just got around to fiddling with it.

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1983 300CDT -- 177K

Here is one.

Oil Filter Housing Bolts Mercedes Benz 0M617 Turbo Diesel Engine 300SD 300D | eBay

Check on this one
http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/298904-fs-617-n-engine-parts.html

I've got one I took off my 617 from a 123 when I swapped in one from an SD for clearance on the diesel 107 project... Cheaper than the one referenced. PM me if you're interested.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

I did some looking around and found a part number 1171800175; looking further I came acrossed one of our own threads showing the Thermostat and the same part number; see post #41:

Will I still Get Filtered Oil If I Block Off My Oil Cooler Lines or Ports?

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84 300D, 82 Volvo 244Gl Diesel

I got the thermostat thanks to member Hogweed, who also sold me a used oil cooler. Question now is how to get the old tstat out of the housing? Seems to require a special Mercedes, pronged socket to fit in the lock ring holes. I've thought about taking a pair of needlenose pliers in a vice and twisting the housing, but I'm afraid that would scuff up the lock ring pretty good, plus there's no way to properly torque it. Any ideas?

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1983 300CDT -- 177K

Local pep boys has a rack of specialized tools. I'd look to see if one of them will fit it. Most of the ones I've seen have the pins further apart though. There is a thread on here describing the use of a punch to get it out.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Found this thread on Benz-world on removing the stat

Removing that oil thermostat on a 240D? - Benzworld.org - Mercedes-Benz Discussion Forum

And this.

Removal and installation of thermostat in oil filter

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

In case you never solved it, I did it very simply. Take needle nosed pliers, shove one end in each hole, grip your pliers and twist it out. I believe I blue-loc-tited it when I re-installed.