17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2000 C2 - Cam Deviation Assistance
Leading reported evidence
Replace bank 1 vario cam tensioner unit due
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
My devotion numbers were very similar and I replaced the bank 1 vario cam tensioner unit due to a failed internal seal and the new unit had new pads included .
Leading evidence: 'Replace bank 1 vario cam tensioner unit due' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace bank 1 vario cam tensioner unit due' (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 also replaced the cam to cam chain and after all that my bank 1 devotion number only improved by 1 degree so there is more to devotion than just pad wear.
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
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Performed · outcome unconfirmed
My Indy replaced the pads and chains when I brought my MY2000 C2 in for IMSB replacement and UAOS install.
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
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Performed · outcome unconfirmed
On the early 5-chain motors, the top and bottom pads (2 per side) can be changed without dropping the motor.
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
It may also be a streched long chain off the ims causing the higher numbers and that cant be changed without splitting the case.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace bank 1 vario cam tensioner unit due
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
My devotion numbers were very similar and I replaced the bank 1 vario cam tensioner unit due to a failed internal seal and the new unit had new pads included .
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 also replaced the cam to cam chain and after all that my bank 1 devotion number only improved by 1 degree so there is more to devotion than just pad wear.
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.
17 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: 20261026T163944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello all,
I recently purchased a Durametric to start getting data on my C2. Well...it looks like I might have an issue here. I have had no codes since I purchased the vehicle 3 years ago and have done quite a bit of preventative maintenance. I replaced 2 of the 3 tensioners about a year ago, as I here a little chain chatter on start up then immediately goes away. I thought this would alleviate this, it did briefly then started back up again. It seems I might need to have the pads replaced. Now that I have this tool, is there any other screenshots that I could grab that could possibly help out? Let me know and I will grab it. FYI, the vehicle was at operating temp when I pulled these. Any assistance would be appreicated.
Thanks,
Scott
The pictures indicate you are -7.75 and -2.81 crank degrees. The max delta between the two should not be higher than 6, and Jake recommends 4 max. And there�s also an absolute max recommendation (the absolute number for the relationship between crank and cam, regardless of cam-to-cam separation. I don�t remember whether the maximums are for cam or crank degrees.
Thanks for the quick reply Mike. This is what I see also. However, if I remember correctly, I believe once the deviation is over 6 degrees it is a sign of wear on the pads. Let's see what others might have to say on this. Thanks again.
My devotion numbers were very similar and I replaced the bank 1 vario cam tensioner unit due to a failed internal seal and the new unit had new pads included . I also replaced the cam to cam chain and after all that my bank 1 devotion number only improved by 1 degree so there is more to devotion than just pad wear. Possibly a tweaked sensor pickup tab on the cam or a non accurate cam grind in relation to the cam sprocket timing marks. Car runs great regardless. Don�t be fooled into thinking new vario cam pads will make devotion numbers near zero.
ill agree with this, my pads on both sides moved each about 2.5*. My bank1 also had a bad actuator and i had to go back in and change that. It moved that side another 2*. It may also be a streched long chain off the ims causing the higher numbers and that cant be changed without splitting the case.
Yea trans and oil pump housing must be removed to get to the long chain upper and lower guides. Generally these do not wear like the variocam guides do.
On the early 5-chain motors, the top and bottom pads (2 per side) can be changed without dropping the motor. One side is a little easier than the other due to the AC compressor needing to be removed. But both sides require taking off the exhaust, which many times requires new exhaust bolts - some bolts snap and require drilling out. The valve covers come off and it�s often the case that one or more spark plug tubes and associated o-rings should be replaced.
thanks Mike, this is helpful. Is this what you did? I think I read your post that deviation dropped. I might have my local indy tackle this job. Just out of curiosity, do you, or anybody, know what the cost would be to have this performed?
@Mike Murphy
I recently passed on a car as I understood that the deviation had to be less than 6 degrees. I dont wrench so please feel free to confirm that by delta between then 2 should be
{(Bank 1 - Bank 2) <6 },
at least thats what I am understanding from your reply here.
I have watched the ECU interrogation video that
@Flat6 Innovations
has posted on YouTube and I am wondering if I misunderstood it.
My cam deviations were similar to the OP's. My Indy replaced the pads and chains when I brought my MY2000 C2 in for IMSB replacement and UAOS install. I don't think the chains added a lot to the cost and replacing them eliminates one mode of failure.
You are correct. In addition to the fact that your cams are very closely in sync with each other, they are still 6 degrees off the crank. That timing matters too, as far as I understand, and makes a difference.
I have had similar deviations since I bought my car. I don't lose sleep at night, I'm not going to do anything about it but continue to monitor it. I have posted in another thread about this. I think I have measured it since 2019 but just didn't log it, never went over 8 degrees.
rVRezLM.jpg
Having a 99, I'm pretty much not going to change the IMS bearing and if it ever fails, I'll just get a new Porsche short block and swap it myself. Would be fun and not crazy expensive. About half way through a complete rebuild on my son's B5S4 engine.
@Paul Waterloo
thanks for the info. I am going to continue to monitor as well. However, preventitively I plan on changing out the pads and the two chains in the near future. Just good piece of mind for me. Thanks.
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