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Chain Tensioner

TKE878

By TKE878
in 986 Series (Boxster, Boxster S)

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TKE878 Member

TKE878

Posted
Posted

On a 2001 Boxster S, with 79K miles, Can someone tell me what the signs and symtoms of a failing chain tensioner would be? How would one properly diagnose that one is failing? Would the symtoms be the same for the VarioCam as well as the 3 chain adjusters for IMS, Banks 1-3 and 4-6?

Thanks

Dan

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logray Member

logray

Posted
Posted

For a 2001 986 car.

Symptoms of failing paddle chain tensioner (the three you mention) would be abnormal noises coming from them, perhaps they are blocked and not filling with oil. Lose chains/chain slap and possible timing issue. Generally not a good situation.

Symptoms of failing variocam chain tensioner (actuator) could be any of the following (not not necessarily all of them) rougher than normal idle, low power, less power throughout rpm range, possible check engine light codes, improper actual angles values, inability to activate actuator from Durametric/PST2/PIWIS.

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