17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH1999 996 timing chain tensioner replacement
Leading reported evidence
Replace engine
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
Here are a few pix of my car and pic of my sons $500 project a 1983 944, we replaced the engine with a $700 salvage engine and have about $2200 into a great runner for collage.
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
You coould remove the belt and run it, see if its motor or some accessorie like the AC or water punp - check the water pump for end play (they rattle when the bearing fails) try depressing the clutch and issolating the tranny out of it - or rtelease the clutch to remove the throwout bearing from making contact.
Leading evidence: 'Replace engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'stuck chain tensioner' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check water pump' (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.
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 · Original poster
After lots of thought and stress I am certain the issue is a stuck chain tensioner.
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
After lots of thought and stress I am certain the issue is a stuck chain tensioner."
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 · Original poster
I am replacing the tensioners due to the one on the 4 bank sticking after the car set for six months ( broken left foot) after much research I am fairly curtain the issue is the tensioner, I have read about other people with this issue an I believe the replacement tensioner is an upgraded part.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Frequently discussed actions (10)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check water pump
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
You coould remove the belt and run it, see if its motor or some accessorie like the AC or water punp - check the water pump for end play (they rattle when the bearing fails) try depressing the clutch and issolating the tranny out of it - or rtelease the clutch to remove the throwout bearing from making contact.
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
Here are a few pix of my car and pic of my sons $500 project a 1983 944, we replaced the engine with a $700 salvage engine and have about $2200 into a great runner for collage.
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 · Original poster
I am replacing the tensioners due to the one on the 4 bank sticking after the car set for six months ( broken left foot) after much research I am fairly curtain the issue is the tensioner, I have read about other people with this issue an I believe the replacement tensioner is an upgraded part.
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 · Original poster
The procedure explained was to simply replace the tensioners one at a time starting with the IMS chain tensioner, soak the new tensioner in fresh oil and pump it in order to prime it.
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 · Original poster
I am replacing the tensioners due to the one on the 4 bank sticking after the car set for six months ( broken left foot) after much research I am fairly curtain the issue is the tensioner, I have read about other people with this issue an I believe the replacement tensioner is an upgraded part.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Coverage and how to read this overview
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 · 1 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T181445Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello to all,
I am new to this forum but not to the world of Porsche, I have been on other forums for years and the guys at Pelican parts suggested I try this forum for answers to my questions.
I am ready to replace my timing chain
tensioners, the three external tensioners. I was planing to order the P253 tools to hold the cams in place but I posted some questions regarding the procedure on the Pelican Parts forum and had a response that told me that it is not necessary to do so. The procedure explained was to simply replace the tensioners one at a time starting with the IMS chain tensioner, soak the new tensioner in fresh oil and pump it in order to prime it. has anyone done this procedure, I am not comfortable pulling the tensioners with out locking the cams in place. I will repeat the post I placed on the Pelican forum as fallows. in reading Wayne's right up on the Pelican sight (cam replacement and timing chain tensioner replacement ) the questions had where. I understand that TDC for cylinder 1 and cylinder 4 are 360 degree off, can I lock both cans in place at one time and if not which side do I lock in place for the IMS chain tensioner? The issue with my car came from it sitting for six months (broken left foot) and on start up it their was a rattle. After lots of thought and stress I am certain the issue is a stuck chain tensioner.
no need to hold anthing in place except the crank locked at TDC -
its very important to be at TDC and to pin the crank thru the pully to the block. There are quite a few who have done this here... I would say at least a dozen of them. DO a search fro IMS replacement and the guys who have done that have removed 2 of the 3 (required to swap IMS bearing)
best of luck, welcome - post car specs too (year, model, miles)
last - I didnt see why you wanted to change the tensioners, is there a reason? (I may have missed it)
My car is a 1999 996 C2 6spd. Silver / black leather. I am replacing the tensioners due to the one on the 4 bank sticking after the car set for six months ( broken left foot) after much research I am fairly curtain the issue is the tensioner, I have read about other people with this issue an I believe the replacement tensioner is an upgraded part. thank you for your reply.
If you do a little research here and on the other blogs you will see that some have reported problems using the superseded tensioner for the IMS to crank. Others have reported no problems with it. I spoke with LN Engineering and they said they use the newer one. Just a comment, not sure which way to go, I am thinking of replacing mine too.
Here are a few pix of my car and pic of my sons $500 project a 1983 944, we replaced the engine with a $700 salvage engine and have about $2200 into a great runner for collage. Oh and six months on crutches thanks for asking. I am back on my feet and can't wait to drive my car.
Thanks for the pics. As mentioned nice to have Porsche projects with your son. Six months on crutches....that is a long stretch, your arm pits must still be sore.
I have replace the three external chain tensioners and the rattle is still there, I also dissected the filter and found no debris at all. This is an oil filter with 2500 miles on it and the oil. IMS with no debris??
Can you define rattle? At idle, partial throttle, full load etc. Does it ever go away, only on startup, cold, hot etc. Could also be the pads the chains ride on, they are wear items and are known to deteriorate on the older cars, especially if you have some miles on the car. You can find some info and pics on the RT site but you will have to drop the engine to replace.
Ivangene, see end of OP. "The issue with my car came from it sitting for six months (broken left foot) and on start up it their was a rattle. After lots of thought and stress I am certain the issue is a stuck chain tensioner."
In regards to the oil change I have always been a 3K oil change guy. the car had just under 2500 from the last oil change when it was parked. I changed the oil when replacing the tensioers. and have dissected both the old (2500 mile) filter and the new one. I know waist of 8 quarts of M but the oil and both the old and new filter are spotless, no debris. I have not reved it over 3500 and have not run it long enough to fully worm. oh and happy new year
The noise is constant and follows the engine speed, and sound more like a rattle than the tick you typical get with a lifter. I have not wanted to run the engine to long, I did rev it a bit but then shut it off.
Well I think you can sit home and guess, throw parts at it and hope you hit it, or have a specialist look at it.
Did it freeze while sitting?
You coould remove the belt and run it, see if its motor or some accessorie like the AC or water punp - check the water pump for end play (they rattle when the bearing fails) try depressing the clutch and issolating the tranny out of it - or rtelease the clutch to remove the throwout bearing from making contact.
All just thoughts?
I think you are wise in not running it but also need to get a diagnosis and a specialist would be worth going (towing) too at this point
Just my .02
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