16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCompleted Maintenance @ 105K
Leading reported evidence
Replace 1-3 adjuster
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
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
1-3 adjuster was replaced and engine was turned once to TDC 4.
Leading evidence: 'Replace 1-3 adjuster' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend its replacement too' (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 · Original poster
I replaced the adjusters, confirmed the timing had not changed and turned the engine over two rotations back to TDC 1.
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
I pulled the cover for 1-3 and replaced the IMS to cam guides and the cam chain guides.
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
Everything went back together without incident, changed the oil and filter.
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
A year ago, I replaced the VarioCam pads and chains in my 968.
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've been needing the replace the clutch and AOS for about 6 months now and took a week off over the holidays to do the clutch and some other major maintenance items.
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.
16 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.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Other then that it worked great and the bearing came out much easier then I was expecting.
I've been needing the replace the clutch and AOS for about 6 months now and took a week off over the holidays to do the clutch and some other major maintenance items.
I dropped the transmission and pulled the clutch. The clutch was worn, but I was expecting it to have more wear the way it felt. I decided to replace the IMS bearing while I still had the engine supported from the rear mounts and the front support bar. I got the LN Engineering double row replacement and puller tool. Engine was locked TDC1 and all the chain adjusters were removed. The crank to IMS adjuster was badly scored and made a pop as it was pulled out, so it was sticking. The 1-3 had light scoring and 4-6 was in good shape. I decided to replace all three and since they were out. The bearing was suppose to hard to pull and wanted the stability of it still in the mounts. The new puller (different from the picture on the LN and Jakes web sites) worked well and it came out a lot easier then I was anticipating. The bearing was soaked in oil, but still rather tight for 105K. The new bearing went in without too much issue, I got it started. The instruction mention that the flange might need some trimming on the 10-11 o'clock ear if the fly wheel hits it and mine needed some grinding. I replaced the adjusters, confirmed the timing had not changed and turned the engine over two rotations back to TDC 1. I then dropped the engine to replace the chain guides, AOS, and water pump. Dharn55 sent me pictures and a diagram for the cam holder tool which helped out a lot. I pulled the cover for 1-3 and replaced the IMS to cam guides and the cam chain guides. The IMS to cams had some wear in them, but it was minor. For the chain between the cams the one with the oil hole showed major wear and pitting. When I popped it off the o-ring was folded in half and warped, so it was not installed correctly in a previous repair. 1-3 went back together fine and was roughly timed by some marks I placed on the cam sprocket before disassembly. 1-3 adjuster was replaced and engine was turned once to TDC 4. Removing the cam cover on 4-6 was a pain, as you have to drop the header. The 6 bolts were rusty and even after soaking them in BB blaster for about 2 days and hammering on the bolt heads, 4 of the 6 broke off. The pads on 4-6 were in the same shape and 1-3. On reassembly the fixed chain guide bolt broke below torque specs (7.5 ft/lb) and needed to be drilled out and taped. Luckily it was the one by the cam sprocket and was accessible. This stopped reassembly of 4-6 for about 3 days as Suncoast Porsche (Ric Knab was very helpfully making sure the parts arrived with all the holiday down days) had to order the bolt. This gave me time to replace the AOS (which leaking oil everywhere on head 1-3), drill out the broken header bolts on 4-6, water pump, and RMS. Once the new adjusters and cam guide bolt arrived I completed 4-6. The cam holder tool worked well to fix the cams to time the engine. It put the bolts right back on the marks I made before disassembly. Everything went back together without incident, changed the oil and filter. I rechecked everything and started the engine, just long enough for oil pressure to hit 5 bars. After checking everything again, I restarted and let it idle for a minute then shut down to look for leaks, cool down and top off oil and antifreeze. I've put about 100 miles on it so far and everything looks and sounds good. The clutch is much easier than the old one and it seems like the chain noise has decreased with the new adjusters and pads. Total cost was about $2300 (bearing and puller $680, cam holder tool $260, clutch $450, adjusters $292, guides/seals/bolt $290, water pump $110, AOS $120) but I started buying some parts 6 months ago to alleviate wife wrath.
Rick
99 996C4
87 944S
Boy you have got a lot more guts than I do!!!
great job!!
I think that if I see enough of these do it yourself posts, I may one day have the nerve to try something myself!!
Pete
Great job!
I just discovered the revised tensioner for the crank to intermediate shaft myself and will probably start recommending its replacement too.
Rick-
Very nice job!!! I am planning on doing the same items in the next 30-60 days. I'm about to turn 100k (car runs great) and want another 100k. Will replace cam pads, AOS, WP, IMS. Just need some much warmer weather. We will be in the minus range tonight.
A year ago, I replaced the VarioCam pads and chains in my 968. Was easier because you don't have to remove the engine. The 968 engine had ~100k and showed the same wear as your pics indicated. One cam pad very worn and pitted.
Did you make the 'tools' to secure the cams?
How worn were the chain tensioners (long ones)? Were they difficult to remove/replace?
You pulled the trans and then the engine correct? Did you install them together?
Any 'post' recommendations?
Looks like the new 'puller' threads onto the IMS shaft and pulls the bearing with it. Appears to be a much simpler solution. The previous tools were over $200~300- this looks about 1/10 the $.
Great post.
Charles,
One thing on the new tool. Need to add a washer between the nut and the under the barrel. Mine started to gaul and spin the barrel in the IMS flange area. I really didn't want the steel barrel spinning on the aluminum block. I filed off the gaul and added a oiled washer. Just an idea for future tools. Other then that it worked great and the bearing came out much easier then I was expecting.
Thanks
Rick
99 996C4
87 944S
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