More - Re: [alfa] single-row timing chains

["Gwynne W. Spencer" <gwynnes1@xxxxxxxxxxx>]

As I promised earlier (see below) I checked on the BMW inline 6 
configuration and was told that they use single row chains also.

A single row chain drives the exhaust cam and a short single row chain 
drives the intake cam from the exhaust cam.

Gwynne Spencer

Interesting - I follow BBS with a very large  audience re BMW E39 models 
and I have not heard of a single timing chain failure for the V8 (uses 
single row chain) nor for the inline 6 engines (do not know if they are 
single row, but will ask)

Gwynne Spencer

At 02:11 PM 11/8/2004 -0800, you wrote:
>>I believe when Mercedes went to single-row chains on the V8s in the 70s/80s
>>they had a lot of trouble, and eventually went back to double-row.  I recall
>>they even offered a conversion to retrofit single-row chains on older
>>engines to double-row.
>
>I can verify this..  We "adopted" my wife's parent's 81 380SL a while 
>ago.. and it had had this modification done to it.  Strongly reccomended 
>by their mechanic,  and from several other sources I encountered since, it 
>was a weak point in those engines and quite a few broke.
>This usually trashed the engine, and probably totaled many cars,  with the 
>huge cost of a major engine rebuild from a dealer getting pretty close to 
>value of the car.
>
>Jon and Marcia
>77 Spider ("Angelina" our "27yr old Black Italian Co-Wife")
>81 380SL (formerly "Ben" now "Ben Her's" my wife's "23yr old Blond German 
>Co-Husband")
>(Somehow, I REALLY don't feel the same about that second classification!!!)
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