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Install light weight single mass flywheel
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The 3.8 "S" vibration damper is good for street/track cars that have removed the dual mass flywheel and have installed a light weight single mass flywheel that has no vibration absorption at all...
Leading evidence: 'Install light weight single mass flywheel' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install light weight single mass flywheel' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Also, don't forget to let the loctite on the tensioner roller bolt cure before attempting to replace the belt.
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Suggestion
It will also fit on a 3.4 or 3.6 and I have recommended it for those who run a single mass flywheel but I don't think the word gets around....
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Install light weight single mass flywheel
No successful repair reported for this finding.
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Performed · outcome unconfirmed
The 3.8 "S" vibration damper is good for street/track cars that have removed the dual mass flywheel and have installed a light weight single mass flywheel that has no vibration absorption at all...
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I'll play the devils advocate here...
Not knowing the history behind this, couple of off the wall thoughts....
Could be the pulley just fell apart like that and thats the end results, belt never fell off...???
Or, a scary thought, but maybe the tech responsible for this didn't realize the pulley was even damaged and thought it was good to go. We do have some exceptionally special techs out there.
Another reason to 86 those plastic idler pulleys. You are going to want a new belt as well. I ditched the plastic pulley when its surface got crenellated after a couple thousand miles. I replaced it with a billet version made in the USA so no tariff! See comparison below.
Does the OP (or anyone else) know what's up the crankshaft pulley? It looks like it has some kind of harmonic/vibration dampener on it which I've never seen before. A Tip thing maybe?
Definitely looks heavy compared to my stock one.... I think Slakker racing were saying that an underdrive pulley was a good add on for the 996! A bit more power
The 997.1 3.8 "S" engine have that vibration damper on them ...
It will also fit on a 3.4 or 3.6 and I have recommended it for those who run a single mass flywheel but I don't think the word gets around....
I don't want ANY underdrive pulley on my street/track car...it slows down the alternator, water pump, A/C Compressor, things I like on the street/traffic, yea it saves a little HP and is good for cars that run at 4-7K RPM all day long...
The 3.8 "S" vibration damper is good for street/track cars that have removed the dual mass flywheel and have installed a light weight single mass flywheel that has no vibration absorption at all...
I got this Pelican pulley kit a couple years ago for $150. Its all metal rollers with *** bearings iirr...
https://www.pelicanparts.com/More_In...-KIT4-HBT&fc=Y
Just make sure to take it slow and easy with that lower idle roller when removing it. Also, don't forget to let the loctite on the tensioner roller bolt cure before attempting to replace the belt. If the bolt spins, you'll be hard pressed to get full tension. Some guys have welded the bolt to the bracket on the tensioner to prevent this.
They seem to be +/- about double the cost of plastic.
I found the 3 of them ~$100 cheaper 'on sale' at AutohausAZ. Ordered yesterday and they got here today. Seem to be well made.
https://www.autohausaz.com/catalog?v...age=1&sortby=r
