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YOUR RESEARCHMy little project for Friday night w/pics
Leading reported evidence
Replace @ ~42k; excessive whine
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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Performed · outcome unconfirmed
Dennis, I had my lower idler pulley replaced @ ~42k; excessive whine.
Leading evidence: 'Replace @ ~42k; excessive whine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace @ ~42k; excessive whine' (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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Performed · outcome unconfirmed · Original poster
While I was in there I replaced the oil filler tube that broke during another project.
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Performed · outcome unconfirmed · Original poster
Used the 15/16" wrench and a 15MM I believe to back up the tensioner pulley and remove.
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Suggestion · Original poster
I used a 15/16" wrench (should use a metric) on the tensioner to pull the belt off and I believe the idler that has the long bolt that runs through the alternator was a 15MM.
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Suggestion · Original poster
I used a 15/16" wrench (should use a metric) on the tensioner to pull the belt off and I believe the idler that has the long bolt that runs through the alternator was a 15MM.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I used a 15/16" wrench (should use a metric) on the tensioner to pull the belt off and I believe the idler that has the long bolt that runs through the alternator was a 15MM.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
23 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
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Generation: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My top idler and tensioner pulleys were becoming increasingly noisy for months now so I decided to finally change them. The bottom idler was smooth as silk so after $150 in pulleys, it was time to change them both or I was going to be walking. While I was in there I replaced the oil filler tube that broke during another project. Figured it was time to give the board some pics for once...
First pic shows how the slop in the bearing allowed the pulley to rub the stalk that holds the pulley.
About ready to pull the distressed tensioner pulley off. This pulley was shot even more than the idler that retains the alternator on. Very crunchy sounding.
95 degrees tonight and working on a hot motor on my knees, doesn't get any better than this....gotta love it!
Oh yea, the pulleys were the culprit, the motor sounds so quiet I can hear the injectors ticking.
Pull the airbox - unplug sensor at right side (open retaining clips for sensor wire X 2), loosen hose clamp at TB, and retaining bolt near lid latch
I used a 15/16" wrench (should use a metric) on the tensioner to pull the belt off and I believe the idler that has the long bolt that runs through the alternator was a 15MM.
Used the 15/16" wrench and a 15MM I believe to back up the tensioner pulley and remove.
Porsche gives you a brand new bolt (male) and a indexing collar (female) for the tensioner pulley. The bolt comes from the rear and cant be removed due to clearance between the engine and the idler stalk so I reused the factory one. Really no need to swap it out.
I knew you would like the pics Tim and I just got in from training in CT today. It was like a 30-40 degree cooler tempurature difference up in the NE. It was cold in NYC, Hartford, and Boston all this week and really hot in TX, crazy. Sweat was dripping off my face about 10 minutes into it.
I've been hearing lots of noise from my engine lately. I was trying to decide if it was something related to the A/C, but maybe it is the pulley issue... is this common?
You can use a 9/16" for a 14mm too. As long as it fits nicely, the bolt/nut doesnt know which measurement scale is being used.
Mine sounded like a cheap bearing in the wheels of a skateboard once no load was on it. I dont remember what sounds it exactly (it was 2007) made when it happened, probably squeeky or rock-crushing sounds.
Mine's kinda like that. I thought it might be the A/C, but it still does it even with the A/C turned off...
I'm not sure what it is... It's not terrible, but I know it doesn't sound exactly right...
Lets hope it is simply an idler pulley which it probably is. The AC compressors dont make too much noise from my experience, they simply lock up and toss the accessory belt.
Should the belt be replaced new any time you take it off, or can you take it off and put it back on as many times as you like?
Just asking because the older 944 N/A motors had very finicky belts and I guess I just got used to that.
Edit: This is something I've got to try, my belt has always sounded too tight, bet it's just a pulley.
in under 5 minutes you can remove the belt and run the car, if the sound is gone, you know it is one of the things the belt drives... you can also then rotate the pulleys by hand and feel and grit while turning or slop in it.
the belt can be removed and put back on - as long as the condition of the belt is good, flip it inside out and give a little bend to look for cracking or freyed areas
