grown

Thanks. So what I'm seeing is, the 997 parts for all rollers are the right parts for my car. Thanks very much for your help, Loren.

An aside, for those of us left using the out of date PET... the A beside part numbers means discontinued part.

I'm using what's available on porsche.com

So what you're saying is, use the 997-102-119 for lower, and 996-102-118 for upper? Would you mind sharing the screenshots of your updated PET?

14 hours ago, Loren said:

I would not do that.

The correct part number for the idler pulley (for your car) is: 996 102 118 56.

I see the same situation for the upper deflection roller (what I believe you're calling an idler pulley). The 996-102-118-56 part is listed as a tiptronic part. There is a 997-102-118 part listed for M480 cars. I've attached a screenshot of the PET but it looks like the same situation as the lower roller, for which you said I could use the 997 part.

14 hours ago, Loren said:

The cover disc keeps dirt and water out of the pulley.

If the tensioner pulley does not wobble or make noise there is no need to replace it.

I was wondering why you'd suggest replacing the cover disc? Is it not just a piece of metal with very little stress placed on it?

Hi Loren. Yes, it's a six speed. I understand replacing the bolt but what's the idea behind the cover disc? I'm going to replace all three rollers and associated parts (with the 997 parts) but will likely leave the tensioner and tensioner arm as is. Do you have any insight on this idea?

Thanks.

Hi All, My lower deflection roller exploded on the highway earlier this week... bummer.

My car is a very early 1998 996 manual transmission car and I'm unclear on what parts I should use to replace the deflection and tensioner rollers. Can I use the 997-102-119 parts on my early model car? The PET catalogue calls for a 996 part that I can't seem to find online (only the tiptronic part seems to exist). Any advice on what to use? Looking to replace all three rollers but getting mixed messages from the online vendors on what fits my car.

variocam solenoid seals and spark plug tubes is a good (easy) place to start. Do both sides. Doing these seals with the spark plugs is no bid deal. Take the mufflers off!

this is from a cayman with a very bad engine tick

But this doesn't help -- did you listen to the sound clip? Do you realize you're posting in a 996 forum? The Cayman doesn't even use the same engine.

Not only are you (and White987s) not contributing to the topic but you're sabotaging those who are. So thanks but no thanks.

Getting back on topic... what makes you think the noise in post #1 is bore scoring? I'm not ruling out the possibility but I've read the same threads you have and I haven't been able to make the connection.

I'm going with bore scoring.

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:rolleyes: Thanks. IMS bearing too cliche? Or maybe you could explain your 'going' a little more.

My car makes a noise very similar to what was documented in the first post. It's also a 99 c2 with about 135k km. It will only happen at first cold start of the day (A/C off) and doesn't kick in for ~ 5 seconds after engine on. I'd describe it as a rattle or a knock -- and agree with Ahasi that it doesn't sound like lifter tick. It doesn't increase with rpm and will disappear slowly over the first minute of running. I've always let the car build up a little heat in the oil before backing it off the driveway. Outside temperature doesn't seem to affect things either.

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After stumbling across this thread I spent a little time trying to hunt the source of the noise. I removed the belt and started the car cold, the noise was much reduced. I'm not sure if it was just my heightened senses in the moment but I thought I still heard a faint knocking. My water pump was replaced within the last year and was tight and free spinning. The idler pulleys are all tight and medium-to-free spinning. The alternator, P/S and A/C seemed fine too.

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​Car will be on the lift in a couple months for a clutch/etc and may delve deeper into this issue at that point.

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​I might try the driveway experiment again in a couple weeks but really need to get a new trunk strut first. Stupid struts.

Not sure if the OP got the idea from porken or not but these resemble his Porsche lift bars. A google search for "porken lift bars" will provide some more information. Perhaps he can provide more information for you. I'm in no way affiliated with porken but do like the idea of lift bars a lot.

Jamesx19, do you have an update on your car?

Loren, any chance you have a better version of this headlight wiring diagram?