Re: [alfa] single row timing chains

[bearbvd@xxxxxxxxxxxxxx (Greg Hermann)]

At 12:20 PM 11/7/04, Gwynne W. Spencer wrote:
>I do not know diddly about  chain specs, but when BMW changed their V8 from
>4 liter to 4.4 in 1996/97, they switched to a single row chain (this drives
>DOHC head in each bank and later versions also have variable valve timing.
>This was ostensibly to reduce friction and increase CAFE.

I think the Peugeot/Renault/Volvo V-6 (B-27 engine in Volvoese) used 3SR
chains. as well.

Greg
>
>Gwynne Spencer ('93 Spider Veloce, '97 BMW 540i [4.4 ltr V8])
>
>At 09:50 AM 11/7/2004 -0700, you wrote:
>>At 10:12 AM 11/7/04, Randy & Marge Barnhart wrote:
>> >anyone know of a source for single row timing chains for 4 cyl 2000, or
>> how to
>> >remove 1 row from stock chain, and if so what do you use for the master
>> link?
>>
>>Absolutely NO way that you're going to narrow a double chain to single and
>>get a usable item.
>>
>>The later cars use '3DR' type chain. Does the 2000 use '3SR' ??
>>
>>Used to be Reynold (Brit) made both 3DR and 3SR. An even (MUCH !!!) better
>>alternative was Jwis (a Benz captive of sorts)-- theirs was considerably
>>heftier than the industry standard, and was a 'drop-in' replacement for
>>3DR/3SR.
>>
>>I don't recall whether any Merc's used the Jwis 3SR equivalent. I think
>>some chain drive cam Datsuns used 3SR as well. There were also some Asian
>>made 3SR and 3DR chains available, but, at least back in the day, they
>>might as well have been made out of used Tootsie Rolls !!
>>
>>I have no idea what corporate matings or name changes may have taken place
>>since I was up to date on this stuff.
>>
>>You are generally going to be MUCH safer and more durable if you buy the
>>tool (generally available from an industrial roller chain distributor) for
>>assembling and dis-assembling pin links on the specific type of chain, and
>>use NO master link at all !!
>>
>>I would suggest some googling on 'Reynold', 'Jwis', and '3SR chain' (IF
>>that's what the 2000 uses).
>>
>>The 3DR and 3SR chain standard dimensions are a 'British Standard' sort of
>>a thing, not American or continental European.
>>
>>Greg (was a product development engineer for Morse Chain in the '60's)
>> >--
>> >to be removed from alfa, see /bin/digest-subs.cgi
>> >or email "unsubscribe alfa" to majordomo@domain.elided
>>--
>>to be removed from alfa, see /bin/digest-subs.cgi
>>or email "unsubscribe alfa" to majordomo@domain.elided
>--
>to be removed from alfa, see /bin/digest-subs.cgi
>or email "unsubscribe alfa" to majordomo@domain.elided
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided