51 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 idler Pulley
Leading reported evidence
Install september 2016
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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.
Performed · outcome unconfirmed · Original poster
Not sure in the grooved look the belt was fitted September 2016.
Leading evidence: 'Install september 2016' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install september 2016' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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.
Performed · outcome unconfirmed
I think it can definitely be repaired/welded and the re-drilled/tapped.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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.
Performed · outcome unconfirmed · Original poster
So Lorenzo 996 will go via low loader to my Porsche garage, the thought is it can be repaired, we will see.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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
Wait and see if it can repaired (and/or how it can be repaired) and how much it's going to cost to do it, and whether the repair will be guaranteed and for what period of time.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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
Wait and see if it can repaired (and/or how it can be repaired) and how much it's going to cost to do it, and whether the repair will be guaranteed and for what period of time.
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
Wait and see if it can repaired (and/or how it can be repaired) and how much it's going to cost to do it, and whether the repair will be guaranteed and for what period of time.
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
Wait and see if it can repaired (and/or how it can be repaired) and how much it's going to cost to do it, and whether the repair will be guaranteed and for what period of time.
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
Wait and see if it can repaired (and/or how it can be repaired) and how much it's going to cost to do it, and whether the repair will be guaranteed and for what period of time.
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.
51 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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T142254Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
So Tuesday evening, My 996 with no warning, normal engine sound. Fantastic to be honest. I can hear what I thought was a drill or similar sound in the distance, metal in metal?.
Called into my normal Ind garage pulled the boot, and they said and pointed out I had a pulley missing, I mean gone sheared off. Part of the bolt is in the bloc. And the area where the pulley was is slightly jagged so the bloc surface is also gone.
Any advice would be great, is it a fix my garage can do.
Has anyone heard of this happening and how did they fix it.
Thank you
Colin,
It should be an easy fix. The big question is collateral damage. When the belt is thrown off it could do lots of damage or none.There are lots of electrical connections in the "firing line"
The other question is "while they are in there" -what else? Fortunately, not much.The pullies and belt are all generic and easy to source .
The only tedious aspect that your Indie may need sympathy for is a concealed and difficult 15mm bolt head for the tensioner pulley.But they will know all about that !
Many thanks for the replies. The garage have updated me this morning being a day the Uk is closed due to a bank holiday. The engine block is missing the area the pulley would have been located so that went with it. They are talking about removing the bolt grinding the area and using washers to pad the pulley as compo for the bloc missing the location. They have never done in 40 years of trading. Great guys and honest. Any suggestions I can offer would be great, I will post a pic ASAP. Anybody ever hear of this before, the belt is only 3 months old done by Porsche and is not damaged I was a mike from the garage so limped in. Thank you.
I have never heard of the idler on an M96 breaking/fatiguing off...that's a new one on me.
It will probably never happen again - but...when you have no serp. belt, you have no power steering, no alternator, and (perhaps most crucially) no water pump, so it's a good thing you were only a mile from the shop.
Thanks for the reply. I am not mechanical but a 996 is my dream car, do you think the grinding down and washer plan will work as permanent fix. Cheers.
I will post pics on Tuesday as we are on a long bank holiday weekend here in the UK. To recap the drill sound started 2 mins from home and I recall being almost stationary with the noise, no bang or loss of anything all dash lights as normal. I drove to my garage a mile or so very slowly. The sound was a grating sound belt in as new condition missing pulley 8. Lower left of the be two the block is jagged and looks white where the bolt was and a skim of the bloc. I hope this is going to be repairable. Cheers Colin
I had my idler pulley bolt shear off a few years back. Just the bolt. The engine block wasn't damaged.
Strangely, it didn't throw the serpentine belt. Car kept running. It was a simple fix, once I got the broken bolt out using a left-hand drill bit.
edit: Here's the thread describing my issues (with pics)
https://rennlist.com/forums/996-foru...al-solved.html
Wow. That's a difficult one. From this diagram it is Part #'s 12, 13 and 14 that attach directly to the engine block. It is hard to see from your picture how much of the original bolt hole is left, and how deep it goes. It looks like part of the engine block has broken off and there is not much thread left in the hole. You might be able to thread as much of the remaining hole as you can and shim the bearing, but it looks iffy to me, and how long it would last is questionable. Good luck.
http://www.autoatlanta.com/porsche-p...section=101-10
The only other thing that might work, aside from engine disassembly and replacement of the left engine block, would be to TIG weld a nut on there. Highly specialized welding and you run the risk of that part of the aluminum block becoming brittle. Probably an engine out job given the constraints of access and extreme difficulties of getting it right. It really sucks to be in this position.
Thank you.
The belt stayed on the car is amazing.
Would you be kind enough to give an honest thought.
Is this engine exchange ?
Many thanks indeed Colin
From the pic, the boss is gone. This is a tough one. I don't have an answer but just wanted to point out there seems to be excessive load on the belt before. You can see the deep groove the belt wore down on the pulley.
yes, it would. I blew a belt shortly after my rebuild because i didn't tighten the power steering pump pulley properly. Was a PITA to turn the steering wheel and I'm glad I was 2 blocks from my house as the water pump runs off the same belt.
Did you go back and try to look for the pulley? This is going to be an interesting repair. Let the mechanic try what they think would work. Don't have much to loose anyways.
Definitely engine out. The repair will require great skill .Start asking for recommendations to people who do machining work and welding on old,valuable cars and motorbikes.
Looks like the car has been used in a very corrosive environment ?
The there are all the 'while you are in there' jobs. It will be expensive but it seems the internals of the engine are excellent(your assessment). So worth while doing.It will take a while so I hope you have alternative cars.
So Lorenzo 996 will go via low loader to my Porsche garage, the thought is it can be repaired, we will see. Thank you for all of the replies.
I have walked the route sadly not found anything.
Manchester is named "Rainey City" maybe that answers the question of the rusty look?
Not sure in the grooved look the belt was fitted September 2016.
My guy is Porsche only and has 30 yrs experience so fingers crossed.
Cheers Colin
I think it can definitely be repaired/welded and the re-drilled/tapped. The big question is whether the surrounding area of the block will be weakened... It may be a situation where the entire section of block needs to be heated first to reduce thermal shock to the surrounding area (which obviously means complete engine tear down)... Good luck with it, I hope it works out for you
Do you have the pulley that broke off? The bolt should still be attached to it with the broken piece of case on the bolt...
Oops just went back and saw the picture of the pulley.
Is the pulley bolt completely gone or is it still in the pulley? I know it sheared off the block but was wondering if the bolt was still in the pulley, and the sheared off part of the block is still attached on the backside of the pulley.
Come on guys, the pulley is on that picture. It�s stuck between belt, crank pulley and tensioner.
My best guess is, that the bearing seized and engine tore the boss off the block.
For the repair, engine needs to be removed. I would not weld, just machine the boss surface flat and make collar for the bolt.
You can see the loose pulley and crank pulley. If you could zoom out, you would allso see the belt tensioner pulley. Belt holds the broken pulley between crankpulley and tensioner pulley.
I knew that. Yes I spotted it, will post an update. Here in the UK, we have companies offering engine exchange, �4000.00 2 year parts and labour warranty, if I get bad news next week, can anyone advise what they would do if they were me. cheers and have a nice weekend Colin
My advice would be not to get too far ahead of yourself. Wait and see if it can repaired (and/or how it can be repaired) and how much it's going to cost to do it, and whether the repair will be guaranteed and for what period of time. Once you have that information you can make an informed decision regarding cost/risk. Good luck
I take that to mean the pulley bolt is missing in action. Strange physics on this one. The pulley bearing must have frozen, sheared the bolt in two pieces and taken out the boss on the block. Doesn't really matter. My concern is the broken boss on the block. That is going to be one tricky repair, if it can be done at all. The lateral force where the pulley bolt attaches to the block must be huge because of how the belt wraps around the pulley under tension.
The head of the bolt and the pulley with some of the block broke off. He has extracted the bolt easily this morning. Tony Greaterex indi Porsche Legend is on the job, I will update you all next week. Cheers Colin
