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YOUR RESEARCHQuit your whining! How much does your 996 whine?
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Replace about 4 quid each rather than
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I read a post by poppopbangbang that the bearings in the idlers are stock sizes and can be changed for about 4 quid each rather than changing the whole pulley.
Leading evidence: 'Replace about 4 quid each rather than' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace about 4 quid each rather than' (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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Indeed - when I last changed the belt on mine, all three of the tensioner/idlers were a bit noisy.
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Suggestion
I read a post by poppopbangbang that the bearings in the idlers are stock sizes and can be changed for about 4 quid each rather than changing the whole pulley.
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Suggestion · Original poster
I might also try running breifly from cold with no belt....just to be sure right is a pulley...will be very brief....
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Replace about 4 quid each rather than
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Performed · outcome unconfirmed
I read a post by poppopbangbang that the bearings in the idlers are stock sizes and can be changed for about 4 quid each rather than changing the whole pulley.
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Suggestion
I read a post by poppopbangbang that the bearings in the idlers are stock sizes and can be changed for about 4 quid each rather than changing the whole pulley.
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911uk: 1 discussions
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How much does your 996 whine? I know "it's a 911 thing" but I think mine whines a fair bit.
This video makes it sound worse than it is. But it whines over 1k, and then at 3k the exhaust drowns it out.
https://photos.app.goo.gl/h5vm499fEiqB56Lg9
How much whine is normal?
All my pulleys feel Ok, so just want to get a feel for what's normal before I replace them one by one.
I might also try running breifly from cold with no belt....just to be sure right is a pulley...will be very brief....
Ah. The 3.4 does apparently whine more than 3.6:
https://www.renntech.org/forums/topic/6287-engine-whine-noise/
https://rennlist.com/forums/996-forum/570406-996-do-whine-right.html
I don't think it has got louder in my ownership though it could be the kind of thing that creeps up on you. Going to try without a belt tonight.
I have a water pump waiting to go on so might just swap that first before the idlers and alternator. It had a new a/c compressor not a million years ago.
Indeed - when I last changed the belt on mine, all three of the tensioner/idlers were a bit noisy.
The IMS chain is a little noisier on pre morse chain models, but it's hardly 'noisy' as it has a huge amount of oil flow around it..
The main source of whine on mine is the gearbox bearings :/
Thats where I thought mine was from! Until I revved it up today in neutral (I don't have a habit of doing that) and was surprised the whine was there.
Where are you in the UK? There is a gearbox rebuilder near me that quoted me a good price. He has done a few 996 boxes and has a source of bearings.
Not had chance to whip the belt off yet. Will try tomorrow as its dark now.
I read a post by poppopbangbang that the bearings in the idlers are stock sizes and can be changed for about 4 quid each rather than changing the whole pulley. May have been over on pistonheads.
Ian
Mine made a load of whine the other day when I took it on a long trip for work. But it might have been because the windows were cracked open and the sunroof tilted open too. But it sounded quite bad increasing up to 3k rpm when the exhaust kinda took over. I have a new belt so might get that fitted sooner rather than later. And hopefully it's nothing more serious like water pump or a/c on way out. Having said that it seemed quieter on the way home so I might leave it. And northway didn't mention anything when it was in the other week
Not sure about £4, but if anyone can Poppop can..
I could only find them for £18 each from here -
http://www.bearingbasement.com/prod...ag-double-row-angular-contact-bearing-sealed/
I changed mine as preventative maintenance. Luckily I've not had any whine. Apart from my box but that was only when moving and up above 50mph.
A rebuild sorted it out. Silent now. Just that gruff flat six noise. 8)
Try switching your aircon off and see if the whine goes away. When mine needs a re gas, the pump whines a lot, turning off the aircon instantly removes the whine.
