Re:bmw m635 timing chain

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bm0635
Posts: 43
Joined: Fri Oct 12, 2018 1:03 am
Location: victoria

Re:bmw m635 timing chain

Post by bm0635 »

hi, still after a chain, can anybody tell me how many links in the chain, part 11311401379
after 20 emails to germany head office i finally found a guy who is interested, no chain but he sent me the original cad drawings of the chain, but it does not say number of links, seems like iwis made them, well thats what is on the title block of the drawings, so now to see if i can get someone to make it here in aust. it gives chain strength and all the necessary info., and i presume material strength is better today.
cannot find number of links anywhere, elp me out

regards

richard
chrome75
Posts: 3
Joined: Sun Apr 23, 2023 2:47 pm
Location: Sweden

Re: Re:bmw m635 timing chain

Post by chrome75 »

Hey Richard,

did you manage to find out how many links there are for single chain (11311401379)?
If not, I will be pulling mine out in a few weeks time and can have a look at it.

Regards Bo
cjarvis
Posts: 26
Joined: Wed Apr 13, 2016 11:02 pm
Location: Michigan

Re: Re:bmw m635 timing chain

Post by cjarvis »

Don't know if you are in Victoria Australia or British Columbia Canada. But another thought, long road I know, is to convert the M88 single row chain to the S38 double row chain. That's assuming the S38 parts are more readily available than the M88 parts. I have pics and parts invoices from when I did the conversion many years back. I may also still have the original chain. I'll go check.
Craig in MI
85 745i
85 M635CSi (gone but not forgotten)
71 F-250 (gone but not forgotten)
cjarvis
Posts: 26
Joined: Wed Apr 13, 2016 11:02 pm
Location: Michigan

Re: Re:bmw m635 timing chain

Post by cjarvis »

cjarvis wrote: Sun Apr 23, 2023 3:55 pm I may also still have the original chain. I'll go check.
No luck on the original chain. I passed it to the new owner when I sold the car. It had 52K miles in 2006 when I converted it to a double row chain.
Craig in MI
85 745i
85 M635CSi (gone but not forgotten)
71 F-250 (gone but not forgotten)
wattsmonkey
Platinum Member
Platinum Member
Posts: 1649
Joined: Mon Jul 16, 2007 2:58 pm
Location: Cheltenham, U.K.

Re: Re:bmw m635 timing chain

Post by wattsmonkey »

Pretty sure I've still got my original chain, will have a look.
"Most of it necessary; all of it enjoyable." LJKS
'84 635CSi, dogleg...itbs and supercharger????? Eaton Mess
chrome75
Posts: 3
Joined: Sun Apr 23, 2023 2:47 pm
Location: Sweden

Re: Re:bmw m635 timing chain

Post by chrome75 »

It seems to be 126 links. Still need to confirm with looking at my own chain.
bm0635
Posts: 43
Joined: Fri Oct 12, 2018 1:03 am
Location: victoria

Re: Re:bmw m635 timing chain

Post by bm0635 »

hi, yes it has 126 links, 1981 380 sl merc. has same chain but more links, if you can reduce links to 126 and properly press the chain together you will have a new chain, my engine builder has managed to get a chain for me and i have after all these months managed to get a spare for myself, head is completly finished, new valves and all the rest, new pistons, rings,honed, engine will be brand new, even with the spare chain if anything ever happens to the engine i will go to the double chain, all these parts are available for this conversion, thanks for your replies,
regards
richard
ps. engine builder is pip barker, chief mechanic for the old jps bmw racing team, look them up on youtube
chrome75
Posts: 3
Joined: Sun Apr 23, 2023 2:47 pm
Location: Sweden

Re: Re:bmw m635 timing chain

Post by chrome75 »

Hey Richard,

happy to hear that you have managed to resolve the singel row timing chain issue!

Thanks for the tip about the Merc 380 chain.

Good luck with your build.

Regards Bo
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