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Thread: turbo chain tensioner failure?

  1. #1
    Senior Member
    Join Date
    Oct 2014
    Location
    near Champaign, Illinois
    Posts
    201

    turbo chain tensioner failure?

    Has anyone ever experienced a turbo chain tensioner failure?
    When the engine in my '71 S was rebuilt in 1985, turbo tensioners were put in. Last month, the driver's side chain started making a horrible noise at idle only.
    I didn't drive it, but took it to my mechanic and he verified the chain tensioner had collapsed. I thought this didn't happen.
    Could it have aged poorly due to lack of use?
    Any ideas are welcome.
    Jay
    1946 Willys Army Jeep
    1956 356A Cab
    1957 356A Speedster
    1959 Austin-Healey Sprite
    1962 356B Notchback
    1969 911T 'Speedster'
    1971 911S
    1974 Ford Ranchero
    1986 911 Carrera Cab
    1993 Audi V8Q
    2001 Mazda Miata 'Daughters Car'
    2008 Audi S6
    2018 Panamera 4S 'Wife's Car'

  2. #2
    member #1515
    Join Date
    Mar 2009
    Location
    San Antonio, Texas
    Posts
    4,273
    Had an original tensioner failed my 73S at around 35,000m after sitting for a few months (1975). Put Turbo tensioners on a subsequent rebuild in 85 car was regularly driven and serviced, They were rebuilt in 1999, and ran them until putting pressure fed on in 2018.
    Things leak when left sitting around. If they hadn't been serviced since 1985 even more so.
    I feel for you because my 1975 failure required a complete rebuild.
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs

  3. #3
    Have the tensioner rebuilt using 60 wt. oil, use the later wide bush idler arms (do the other side while you're at it) add tensioner guards, and you should be for another 38 years!
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.

  4. #4
    Senior Member
    Join Date
    Oct 2010
    Location
    Southern Ca.
    Posts
    1,202
    Follow ED's recommendation , the later style idler sprocket arms are as important as the Turbo tensioner update . The Turbo tensioners alone are a small improvement because of the larger reservoir , they need to be installed with the later arms ,

  5. #5
    Senior Member
    Join Date
    Oct 2014
    Location
    near Champaign, Illinois
    Posts
    201
    Thanks for commiserating, David. But, my mechanic and I are pretty sure there is no damage.
    Good suggestion, Ed. I didn't know they could be rebuilt.
    Jay
    1946 Willys Army Jeep
    1956 356A Cab
    1957 356A Speedster
    1959 Austin-Healey Sprite
    1962 356B Notchback
    1969 911T 'Speedster'
    1971 911S
    1974 Ford Ranchero
    1986 911 Carrera Cab
    1993 Audi V8Q
    2001 Mazda Miata 'Daughters Car'
    2008 Audi S6
    2018 Panamera 4S 'Wife's Car'

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