14 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 cam deviation #'s
Leading reported evidence
Replace wire
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
Chain guides, valve chains, throwout bearing, clutch plate bolts, RMS, drilled out a exhaust bolt that I broke when installing the headers, replaced a wire that a mouse must've chewed on, I know there were a few other items that I can't remember at the moment.....
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
I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
Leading evidence: 'Replace wire' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'cel' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Inspect oil filter' (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 suspect a cause
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.
Suspected cause
10 is where there is clearly an issue and probably a CEL.
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
I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
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.
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
I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Inspect oil filter
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
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
I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
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
Chain guides, valve chains, throwout bearing, clutch plate bolts, RMS, drilled out a exhaust bolt that I broke when installing the headers, replaced a wire that a mouse must've chewed on, I know there were a few other items that I can't remember at the moment.....
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
I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
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.
14 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: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I just got back the #'s from my cam deviation report. Bank 1 is -10.38 KW and bank 2 is -.4.38KW. Bank 2 is below tolerance but if you're in there do both, I know.! My question is can I continue driving the car. It runs fine no check engine light. My second question is, how much will replacing the guides and chains cost me with parts and labor? I'm assuming the engine will be dropped. I'm in the Chicagoland area and considering Midwest Performance Cars for the job. They have done other work for me in the past.
You can drive the car but I wouldn't rev it very high....your numbers are bad and need the pads replaced or risk having valve/piston contact. Also, you don't have to drop the motor to have them done. Dropping the motor is a money grab. I had mine done with a bunch of other items (as long as you are in there approach) and iti cost me $7000. I didn't want a 3000 lb. paper weight in the garage so I had it done.
Chain guides, valve chains, throwout bearing, clutch plate bolts, RMS, drilled out a exhaust bolt that I broke when installing the headers, replaced a wire that a mouse must've chewed on, I know there were a few other items that I can't remember at the moment.....
4 degrees of camshaft deviation is enough to warrant service, and 6 degrees is the "I really need to do something" number. Go ahead and do both banks, it'll save you headache down the road.
What is the least expensive route I can take to fix these high deviation #'s. Can I just replace the cam pads and chains? What is the lowest estimate in our community's opinion?
As these engines age there is more to it then just the pads. The chains can stretch and tensioners weaken. Sometimes replacing just the pads results in only a small difference. I say this after reading many 996 and 986 5 chain cars in the shop and after replacing a fair amount of wear pads. Up to 6� is somewhat normal these days as the cars get older. 10 is where there is clearly an issue and probably a CEL.
Trying to go the cheapest route is understandable, but not the best way to look at it. I would use the term, "the most cost effective solution." That would be to change your camchain wear pads and inspect your oil filter for green o-ring debris from a failing variocam solenoid.
This applies to 5 chain engines only.
--Aaron
Is the green o-ring in the solenoid or the actuator? I thought the green o-ring was in the Hartech kit and was a stop in the actuator?
Asking as someone who has found green o-ring and will be getting a Hartech kit. Not sure if I�ll be getting actuators as well.
The solenoid is less likely to fail. The o-ring's that ride on the actuator itself are typically what fail and produce the green o-ring material you find in your oil filter. The green o-ring material is the factory color of the o-ring.
For anyone reading this post in the future remember this is for 5 chain motors. There is so much misleading and misinformation online. This does not pertain to the 3 chain engines. Typically the actuator fail on the 3 chain engines. When they do fail (in 3 chain engines) the engine sounds like it is blown up and won't idle. You should see the look on some customer's faces when you tell them their engine is fine and it was a $300 actuator. On the 3 chain engines the solenoid and actuators (separate units) are removable without removing the cams or cam covers.
--Aaron
It's in the actuator and as you say, it acts as a bumpstop.
The o-rings that have a sealing ppurpose won't degrade such that you'd see bits of them in the sump.
Aaron, do you think a timing chain kit from FCP euro or Desing 911 will solve my cam deviation issues? I could not post a link to either, but both kits are about $1500 each.
I guess your picture should disprove what I posted but I'm afraid I'm not seeing it.
The bits of green O-ring are at the spot where normally the 'bumpstop' o-ring sits but is no longer there. The others are all still in one piece and those are the ones that must seal.
Here my bank 1 actuator (turned around 180 deg compared to your picture), which is of slightly different design in the cap area.
The black piston ring is removed and is visible on the RHS of the pic.
Fat O-ring is the bumpstop one, still in 1 piece.
how many miles on your 996? you definitely need to do pads but heed the info Aaron is telling you
you'll probably need to swap out the green - o rings as well but once your in there you'll know for sure...
do you track your car?
This is a source reference. Confirm exact model applicability in the original material.
