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YOUR RESEARCH74k miles what should be done?
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Install another new one and it had the proper reading
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Read evidence and context
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Performed · outcome unconfirmed
Got and installed another new one and it had the proper reading.
Leading evidence: 'Install another new one and it had the proper reading' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check with a $40 digital manometer' (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.
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Performed · outcome unconfirmed · Original poster
I am assuming the transmission fluid and Serpentine belt hasn't been changed so I will add both those to the list thanks.
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Suggestion
You could save alot of time cleaning cooling parts and save on coolant!
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My 2000 996 C2 is right at 74k miles and I am looking to do some more engine saving/preventative maintenance. We all know about the IMS/RMS (Just replaced w/ LN Engineering bearing and had seal done) issue but what else can cause failure or a 3k+ repair? I am putting a list together for what is most important to be serviced around the 70k to 100k mile mark. I am still a newer owner so any insight from you guys who have spent a lot of time with your 996's would be amazing. I would love to hear all of your opinions and insight on the matter. Thanks in advance for any help!
- Water pump w/ Thermostat
- IMS/RMS
- ?
- ?
Serpentine belt. Coolant flush every 4yrs and brake fluid flush every 2 yrs. The rest can be replaced as they fail.
Transmission fluid change would be good too if never replaced before.
Ok good to know. I just had all my coolant flushed at the time I did the IMS/RMS service. I am assuming the transmission fluid and Serpentine belt hasn't been changed so I will add both those to the list thanks.
Oh yea forgot about this one. Is it a DIY or do you need a lift?
Not unless you keep driving, but it is common to have a coolant tank failure at that age and mileage and they are difficult to replace unless you drop the engine.
Ok. It seems like when you do the IMS at the time intervals you should have an additional 3k extra in repairs done along with the clutch. Replace vario-cam wear pads, timing chains, coolant tank, AOS, IMS, Water pump where does it stop??? Living with extreme OCD it keeps me on edge all the time... So much lost sleep since I bought the car but I could never picture myself parting with it either haha
Hence my reply above
Timing chain and wear pads will require cam cover removal. Significant labor so usually those are not typical PM. My impression is timing chain is more of a MkII issue. You can monitor cam deviations in durametric to deduce pad wear. AOS you can check with a $40 digital manometer. Coolant tank is going to leak, just a matter of time so yeah replace it at your convenience.
The usual potential issues for 3.4 are cracked head and D chunk cylinder (prolly very low probability event but you do see posts pop up from time to time). You already have the low temp thermostat so that should help some even though there is no guarantee.
You're pretty much in the same boat as me. Two weeks ago brought my 2002 w/81k in for LN Pro Single Row upgrade. Asked what other critical items should I attend to at the same time as we're doing IMS? In 3 years and 20k miles of ownership I'd done nothing other than 6 DIY oil changes. They did brake fluid flush, coolant flush, air and cabin filters, water pump, expansion tank, gear oil, needed clutch release bearing (original clutch was only 50% worn) cleaned the leaves off my radiators and just looked car completely over. I came away with a total bill including IMS,RMS and oil change of $3,913. A good chunk of change but my car is healthy and good to go for another 2-3 years.
I'd add plugs and packs to the list. Given the price of everything else I decided to not do ours while the transmission was getting rebuilt. They started failing a couple months later
Not a big deal when they start to go, just annoying. Doubly so if the car was just in for a major bill that included a bunch of PM stuff.
Intermix is a major on these engines IMO. Did you change the AOS when you did the IMS bearing? Also, a cracked head could lead to oil in the cooling system and I read somewhere that almost all 99-01 have the crack in the inner exhaust valve seat on cylinder 1 even if it doesn't intermix. Maybe repair the head before it intermixes? You could save alot of time cleaning cooling parts and save on coolant!
Here is more info
https://rennlist.com/forums/996-foru...ad-repair.html
In the same boat here, planning to drop the engine for VarioCam Pads replacement.
I remember reading an article where it said that they were often overlooked but could cause a lot of dammage once they go. And hey, it's only 18$ per set!
I didn't... I wasn't aware this was an issue at the time because all anyone ever talks about is the IMS... Cleaning I will do though at the moment. Thanks for the info.
Yea my friend was just telling me about them the other day... I also am going to ask him if I can get a credit card to his shop so I can keep up with all preventative maintenance lol. 1500 every month or so for maintenance I can live with but it seems to never end... I also don't have a lift or would I be willing to attempt dropping the engine. Small jobs I am comfortable with.
Yea I was rest assured after my "fix" as well and was getting sleep until I started researching all the other things that can come up unnoticed... Sorry I don't mean to freak you out lol. All the hype about the IMS led me to believe that I could fix that and have a somewhat reliable dream car for a good price. I am by no means cheap or a person who let's things go on my cars but I have learned so much now... Plus I am addicted and can't live without it at this point.
Actually this is one of the exact articles I read that sold me on it hahaha
http://thegarage.jalopnik.com/how-to...-91-1668638286
Are you up to date on your scheduled maintenance - i.e. the 60K maintenance, including fuel filter etc.?
In addition to whatever PM you choose to do based on stuff learned since the 996 was released (like preventive AOS and water pump replacement), the original interval maintenance schedule should still apply.
Yea when I first purchased the car I drove the next day to have the IMS/RMS service done which at that time. All fluids were drained and flushed,new oil/fuel filter,oil change and then I had problems with the Regeneration valves so those were replaced as well. I am checking to see if the AOS was done today in my paperwork. I do know I haven't changed the water pump yet which is next on my list. Are there any symptoms that you can look for with the AOS or is this one of the ones that gives no warning before failure?
By the way your car is absolutely beautiful.
Ahsai, what setting do you have that manometer set at, and what are the optimal values? I have my testing rig built and the same manometer, but I haven't rediscovered your thread to know the ideal vacuum level.
Thanks. It is the only car I've ever bought impulsively, and you can understand why.
Watch that video and pay attention to the part about where there's so much crankcase vacuum the dude has trouble removing the oil cap. That's the most basic test for you AOS's health (unless it's smoking like a WWII destroyer escort - that's also a solid indication of AOS woes).
It's set to "inH20" and you want 4" to 5". I think Porsche is OK with anything < 8".
I installed a new AOS (as a PM) and it failed out of the box. It tested at 10" immediately after install then went up to 20" a few weeks later. No symptoms whatsoever. Got and installed another new one and it had the proper reading.
Ha! Same with my 996. I used to research every car purchase with OCD-like determination, for months before pulling the trigger. Bought my 996 two days after deciding to buy one. A slippery slope, however. Now have five Porsches, all bought impulsively. A sickness, I guess.
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