Author Topic: M116.985 Camshaft part numbers  (Read 105 times)

Berggreen

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M116.985 Camshaft part numbers
« on: 04 October 2021, 05:34 AM »
Hi All

I am currently swapping the camshafts from a reserve engine (M116.985), originally from a European 350SLC (rc107), to my own M116.985 in my European 350SE from 12/1977.

In the process I got a bit puzzled, because when I look up the part numbers in the EPC (online version): http://mb-teilekatalog.info/view_SubGroupAction.php?lang=G&mode=BM&class=1&aggtyp=M&catalog=042&model=116985&group=05&subgrp=015
then I find the part numbers for the camshafts as:

A1160515801 (left)
A1160515901 (right)

But the camshafts I pull out of both the reserve engine, and from my own engine, both seem to have the part number: (only shown here for the left side - I have not started on the right side yet)

A1160514801 (left)

Se pictures attached. Though on the cam from the reserve engine, I can only read "11648".

I also have two w113 280SL, and here you always read the camshaft identifier (the two digits before the last "01") stamped into the end of the camshaft. But when I do the same for my M116.985 camshafts, they both show the identifier "58" stamped into the end, thus matching the part number from EPC, see pictures attached.

I tried to Google the A1160515801 part number, but only get very few (useless) hits - from the EPC.

So what is up and down here? :o
And also what is the difference between the 48 and 58 cams, if any?

Hope you can help clear up this mystery. ;)

Cheers,

Christian

Ps.: Is there by the way a full overview of all the cams used in the w116 somewhere with opening degrees etc.?  :)
« Last Edit: 04 October 2021, 10:39 PM by Berggreen »
02/1971 MB 280SL (aut.) - olive green 291H
11/1970 MB 280SL (man.) - silver 180G
12/1977 MB 350SE (aut.) - deep green 825H
03/1969 Volvo 1800S (man.) - dark green 94

UTn_boy

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Re: M116.985 Camshaft part numbers
« Reply #1 on: 04 October 2021, 12:05 PM »
The numbers on the camshaft are only casting numbers, and have no bearing on the actual part number.  Often time the actual part number will not be on parts such as camshafts.  That M-130 engines are a different beast from a different era, and cannot be used as a comparison in any way.  Including how the camshafts are identified.

There is no "48" camshaft.  Only "58" and "59" for the K-Jetronic M-116.  Bear in mind that the D-Jetronic M-116 engines used different camshafts.  They used 116-051-52-01 (L) and 116-051-53-01 (R).  Or "52" and "53" camshafts. 

The 3.5 K-Jetronic camshafts show to still be available new from Mercedes, but at a substantial cost.  Hopefully you won't have to buy new.  But if you had to you now know they are still available. 

Below is a picture that should answer the rest of your questions. 

1966 250se coupe`, black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3, papyrus white/dark red leather
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex

Berggreen

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Re: M116.985 Camshaft part numbers
« Reply #2 on: 04 October 2021, 12:41 PM »
The numbers on the camshaft are only casting numbers, and have no bearing on the actual part number.  Often time the actual part number will not be on parts such as camshafts.  That M-130 engines are a different beast from a different era, and cannot be used as a comparison in any way.  Including how the camshafts are identified.

There is no "48" camshaft.  Only "58" and "59" for the K-Jetronic M-116.  Bear in mind that the D-Jetronic M-116 engines used different camshafts.  They used 116-051-52-01 (L) and 116-051-53-01 (R).  Or "52" and "53" camshafts. 

The 3.5 K-Jetronic camshafts show to still be available new from Mercedes, but at a substantial cost.  Hopefully you won't have to buy new.  But if you had to you now know they are still available. 

Below is a picture that should answer the rest of your questions.

Thanks a lot for your input. :)

I am however still quite puzzled, why two independent M116.985 engines have the same camshafts, and both are casted with "almost" the same part number: 116-051-48-01 & 11648. Both engines are K-jetronic engines and with identical K-jetronic systems.

Even more puzzling is that they have the number "58", stamped into the end, which matches the cam-identifier from EPC, and also seems to match the old-school "M130 terminology" with the cam-identifier stamped into the end of the cam.

This afternoon I also removed the right cam from the reserve engine (from the 350SLC), and it had the number "11649" casted into the cam, and the number "59" stamped into the end of the cam.  :o

There seems to be too many coincidences here not to form a pattern..... ;)

Cheers,

Christian
« Last Edit: 04 October 2021, 10:37 PM by Berggreen »
02/1971 MB 280SL (aut.) - olive green 291H
11/1970 MB 280SL (man.) - silver 180G
12/1977 MB 350SE (aut.) - deep green 825H
03/1969 Volvo 1800S (man.) - dark green 94

UTn_boy

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Re: M116.985 Camshaft part numbers
« Reply #3 on: 05 October 2021, 12:22 PM »
Why are you surprised that two of the same type engine have the same camshafts?  That makes perfect sense to me.   Again, even though there shows to be some similarity between the partial number on the camshaft and the number on the rear bearing journal doesn't mean anything.  The partial number on the camshaft was nothing more than a casting number meant for internal use only.  It meant nothing to the end user. 
1966 250se coupe`, black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3, papyrus white/dark red leather
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex