Variocam - Sounds Like Crap
09-10-2013, 08:49 PM
#31
Rennlist Member
Oh yeah it's Paul from the D2 A8/S8 forum. Hi Paul.
The 968 can get a chain slap sound but that is usually super scary and indicative of a really blown variocam unit and a chain that is slapping the cam cover. There is also lifter noise from lifters that are low on oil and/or plugged up, and in this case some time and clean detergent oil might have sorted that. A third noise is a weird little 'braaap' noise the variocam makes when it's somewhat worn, I think when it activates/deactivates. I am not sure what causes it, maybe slow activation or looseness in the piston in the middle causing it to shake until it's fully extended.
A clacking is usually not chain slap but rather lifters not fully pumped up, the last time I did a 4v head I almost reached for the Rislone when the noise quieted on it's own. I had not soaked the lifters before assembly.
Cheers,
-Joel.
The 968 can get a chain slap sound but that is usually super scary and indicative of a really blown variocam unit and a chain that is slapping the cam cover. There is also lifter noise from lifters that are low on oil and/or plugged up, and in this case some time and clean detergent oil might have sorted that. A third noise is a weird little 'braaap' noise the variocam makes when it's somewhat worn, I think when it activates/deactivates. I am not sure what causes it, maybe slow activation or looseness in the piston in the middle causing it to shake until it's fully extended.
A clacking is usually not chain slap but rather lifters not fully pumped up, the last time I did a 4v head I almost reached for the Rislone when the noise quieted on it's own. I had not soaked the lifters before assembly.
Cheers,
-Joel.
09-11-2013, 04:32 AM
#32
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Join Date: Jun 2011
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Occasionally I would move her from parking spot to parking spot, and I would start her up once a month, but I never let her run long. After the move, and once the garage was cleared out I literally started her up and went to do a three point turn to face her in the garage forward and right as she rolled in the garage, the clicking went away. I was very confused and got out to rev her from the engine bay. She sounded good so I let her continue to run so I could see if the leak came back.
Today I buttoned her all up (except for belly pan) and took her for a 20 minute drive with about half on freeway and she appears to be leak free.
I am extremely happy to have my 968 back, I really did miss driving her.
