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R107 1985 280 SL
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33 Posts
Discussion Starter #1
Hello All

I'm making slow progress on my M110 enguine rebuild. I've stalled due to a difficulty in sourcing some parts, the main one being the large, banana shaped timing chain tensioner. The part number is 110 050 1816.
MB (South Africa and Germany) don't have it in stock, nor do their classic car parts divisions. Also tried the SL Shop in the UK - no luck. Also tried Pelican parts in the US - no luck there either. Any one know where else I could try?

Thanks
 

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2007 ML320CDI, 1959 220SE, 1971 280SL, 1982 380SL
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597 Posts

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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1,268 Posts
Hi Vanhow,

Sorry to hear about your troubles. If the part is NLA from MB (and a lot of chain tensioners for older engines are disappearing quickly) and an aftermarket option isn't available (Febi etc.) than the link by Rick might be your best bet. I assume the existing tensioner cannot be reused?
 

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1998 C280; 1987 560SL
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458 Posts
Not cheap, they know they are hard to source. but here is one-

Yikes! I believe I would try to fit this to the old guide shoe.

For 1986-1989 Mercedes 560SL Timing Chain Guide Lining Right Febi 43861RP 1988 | eBay

Even if it took some machining at a shop. It might be $15 gamble to save $350. All of the guides and chain for the 560 was less than $200. It looks more like a $1000 for the M110. :eek:
 

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Premium Member
1983 380SL, 2000 S430, 1991 420SEL (retired) - RHD
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5,203 Posts
The nylon piece is separate from the metal support ,it just slips on.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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31,888 Posts
Unfortunately the 280 rail is like the early V/8 metal rails. The surface is bonded and not replaceable.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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1,268 Posts
And the nylon pieces are not available for at least 450 and 500 anymore, possibly other V8s too, you need to get the whole tensioner incl. the metal bracket.
 

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R107 1985 280 SL
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33 Posts
Discussion Starter #8
Thanks Rick - much appreciated! Thats quite a steep price.
Miko, the car has done 160 000 Km. It was burning some oil under deceleration at highway speeds - that's the only reason I decided to redo the engine - so to answer your question, the guide could probably be reused as it hasnt done that much mileage and still seems intact. I find it odd that MB decides not to make that particular part anymore yet happy to continue with all the otgher rail guides.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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1,268 Posts
I hear you Vanhow. If the tensioner is not scarred by the chain than reusing it is a runner for sure. That said, I think you ought to balance it vs the effort you're going through to rebuild the engine already and if getting a new tensioner will give you peace for longer time. I'm not sure if that's the case with straight six like 280, but in the V8 it's highly critical to replace the plastic guides due to age, regardless of mileage - they simply get brittle due to heat. I'm sure someone more versed will advice the best practice for your baby.

Have a think about it and sleep on it, I'd say a new one from MB would probably be $60-100 range anyways - and maybe the ebay dude is open to offers.
 

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R107 1985 280 SL
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33 Posts
Discussion Starter #10
Yip, I'm tempted but the grooves on the rail don't seem too bad. Its also a question of not spending too much on the car - I think I've overcapitalised on it, although thats not the reason for redoing the engine. I plan on keeping it for some time as its in great condition and I enjoy driving it. I agree, I've purchased all OEM parts so far and probably should carry on as I'm almost done.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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1,268 Posts
I like how you use the term "overcapitalise" Vanhow - I'm guilty as well, but what can we do when they all want something every time we look at them :D Mine's defo costing me more than I anticipated, but like you I'm also bulletproofing for the future so I hope the investment pays off.
 

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R107 1985 280 SL
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33 Posts
Discussion Starter #12
Yip - after all the quantitative easing and resultant cheap money, hard assets may come back in vogue :). I guess, until then, we get to enjoy them and learn a thing or two on the way.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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Hehe you got it! Well, let us know what you've figured out and what you're doing about the rebuild - in the meantime best of luck with that adventure! :D
 

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Outstanding Contributor , Bob's Your Uncle!
-----'83 280 SL----- 5 speed....The PIG
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29,196 Posts
I have spent oodles of money on The PIG over the years.

But can you really put a price on a fabulous drive through the Appalachians, Rockies or California route 1?

Or the friends you meet BECAUSE you own a 107?

Spend the money....enjoy the car.
 

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1998 C280; 1987 560SL
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458 Posts
Unfortunately the 280 rail is like the early V/8 metal rails. The surface is bonded and not replaceable.
Well I know it is a different design. But it is still a polymer shoe with a metal backing. It would seem easy enough to remove the old backing and replace with a nylon removable backing like is on the more modern cars (may not work - just a thought). As these cars get older and parts become more scarce we are going to have to adapt to doing things unconventionally or upgrade to newer models.
 

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R107 1985 280 SL
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33 Posts
Discussion Starter #17
Hi

Need more advice please. The big end bearings that connect the con rod to the crank - also difficult to find. Will take a month or more from Germany and are also eye wateringly expensive. Managed to source some locally from a German company called Kolbenshmidt. They are a lot cheaper that MB. I've been advised to make sure they are "Sputter" bearings. Not sure how to tell the difference. I was advised that Kolbenschmidt supply OEM parts to MB, so hopefully they are the correct bearings, despite being Is there any way I can tell whether they are sputter bearings or not? Any advice would be appreciated.

Thanks
 

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Outstanding Contributor , Bob's Your Uncle!
-----'83 280 SL----- 5 speed....The PIG
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29,196 Posts
My engine will die one day. They all eventually do.
But a rebuild? WAY to pricey for what The PIG is worth.
Which is why I bought a spare engine out of a truly rusty car.
That should take me at least until MY demise.
 

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R107 1985 280 SL
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33 Posts
Discussion Starter #19
I understand that option. I guess the rebuilt is a learning curve and if successful, I know the engines history.
 

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1979 280SL, 1984 280SL
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5,636 Posts
I wouldn't be worried about using the Kolbenshmidt bearing inserts. These are simple plain bearings- make sure they are fitted and clearanced properly, you will be fine.
 
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