25 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHEngine Noise - Any Ideas?
Leading reported evidence
Replace engine done
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
65K miles on car but only 25K on dealer replaced engine done under warranty.
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
Note its routing -- take pics and direction of travel if you intend to install it rather than replace it -- and check all the accessory drive pulleys for play, radial and axial.
Leading evidence: 'Replace engine done' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'accessory drive' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check accessory drive pulleys' (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
If one or both are sharp this is a sign the belt is not tracking correctly and this is due to an accessory drive with excessive bearing play.
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
Removing the belt is probably the easiest thing you can do on any car I've ever worked on.
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
Note its routing -- take pics and direction of travel if you intend to install it rather than replace it -- and check all the accessory drive pulleys for play, radial and axial.
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.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check accessory drive pulleys
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
Note its routing -- take pics and direction of travel if you intend to install it rather than replace it -- and check all the accessory drive pulleys for play, radial and axial.
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
FWIW, I've had to replace the ones on my 996 Turbo now twice -- in under 144K miles -- while the ones on my Boxster are original and with over 300K miles.
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
Forget changing your own oil, forget screwing around with spark plugs and coil packs, forget taking off belts and spinning pullies...instead enjoy spending your money for the privilege of having a German trained strange looking creature scrape and burn his knuckles on your beautiful machine.
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.
25 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: 20261027T064914Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Car is a 1999 C2 Cabriolet. 65K miles on car but only 25K on dealer replaced engine done under warranty. Has had IMSB fix done.
I washed the car this weekend, wiped it down and then it sat for a couple hours. I started it up to put it away and heard this high pitched screeching noise.
Drove it into the garage and let it sit two more days. Tried again and it was not as bad but still there. I don't want to drive it until I know what the problem is.
When I opened the hood to take this video some residual water came out of the spoiler area so I'm hoping that maybe it's just from water getting on the engine? I just did a normal hand wash with a garden hose, nothing high pressure.
I'm a bit paranoid about the engine after reading a bunch of horror story threads on here. I know this is just a video but hoping someone can listen and tell me it's just a pulley or a minor issue and not that the frigging IMBS is about to blow up or some other major deal!
Thanks.
https://www.youtube.com/watch?v=GyID...ature=youtu.be
I had to look up to see what an SAI pump was.
How do I just "unplug it"? I found this link to replace it but seems like a bit of an ordeal.
http://p-car.com/996/diy/sai/mainpage.html
Is there an easier way to check it (other than driving it to the dealer in Carlsbad!).
There's an electrical connector on the SAI pump you can just unplug. It may trip the CEL which you can use any scanner to reset or just drive the car to let it reset on its own.
If it's not the SAI pump, you could remove the serpentine belt and hand spin all the pulleys riding on the belt. Then you can run the engine briefly to hear if the noise is still there.
Pete, actually I'm not too sure in this case because:
- its not obvious the noise is from the SAI pump when the camera was panning around
- the sound seems to follow the rev
Just take the car to the dealer and go sit in the waiting room and let a hot looking Barista bring you a crannyberry scone and a cup of coffee. DIY on a 911 is like sex with the ugliest old woman in the world. DIY on any car is bad enough but on a post-1983 911 it is the worst. Forget changing your own oil, forget screwing around with spark plugs and coil packs, forget taking off belts and spinning pullies...instead enjoy spending your money for the privilege of having a German trained strange looking creature scrape and burn his knuckles on your beautiful machine.
You left out the part about bringing your own KY and some serious pain pills. I'm sure there are some really good dealer service departments out there but they seem to be few and far between.
The good dealer service departments provide the official OEM brand of KY...and they also sell it in the parts department.
I'm just shocked at how much time people spend with their cars up on jack stands trying to figure out what is wrong. At least take it to a professional wrench for a diagnosis...and then if you really enjoy working on cars, go have fun. But posting multi-page threads about "what a noise means" doesn't sound like the efficient way to get your car back on the road.
As an interesting dealer story goes....two weeks ago I called my local "stealer" to get a price to align my 87 944 turbo....just rebuilt the control arms and needed for it to be aligned.
The cost? $638, but they said they have QUALIFED PORSCHE TECHNICIANS.
I have to say, I couldn't believe that price. And I even know the service advisor that I spoke to from the Audi club.
It became a long thread on the 944 turbo forum.
Coming on here and asking for some advice and help is not a bad idea. Plenty of experience and ideas for what to check. FWIW most of us are driving our cars and contributing information to those who are learning about 16+ year old sports cars. More power to you if every time something comes up you have the $$$ to run to a dealer. Some of us, however, do not and actually enjoy wrenching on our cars and finding out what could be wrong by asking. I derive great pleasure in fixing a problem on my car. And sometimes, it is not about "efficient", it is about figuring it out.
I might just agree with you here.
I have a bunch of toys and would rather play with them than work on this car. Plus, the hot rods are way easier to work on (like below: no hood, no fenders, easy access!). This looks like a nightmare just to get at anything. If it were my only vice I might be more enthusiastic about diving in to it. I got this car so I could just go for an occasional top down blast on some of the great back roads we have around here. I got other projects to work on.
Now it looks like I'll spend this weekend putzing around with it instead of driving it. Oh well, maybe I can diagnose and fix the problem quickly and be driving it again by Sunday. Or maybe I'll get really lucky and the noise will just go away on its own!
THANKS for all the great tips and things to try, especially from Ahsai. I'll try the SAI pump first, then belt, pulleys, etc. and post the results here.
Either a water pump or idler/tensioner roller bearing is my WAG. The noise goes up and down with RPMs so not likely SAI pump.
For the water pump you can remove the belt. Note its routing -- take pics and direction of travel if you intend to install it rather than replace it -- and check all the accessory drive pulleys for play, radial and axial. There may not be much but you have all the others to compare to.
Check the belt edges. If one or both are sharp this is a sign the belt is not tracking correctly and this is due to an accessory drive with excessive bearing play.
Idler/tensioner roller bearings are harder to diagnose. If you are lucky you'll find with obvious signs of trouble.
FWIW, I've had to replace the ones on my 996 Turbo now twice -- in under 144K miles -- while the ones on my Boxster are original and with over 300K miles.
Well, I didn't get to the car this weekend. I did this instead. Went for a quick ride, jumped on the freeway, had a couple two cars up had their dog jump out the window causing pandemonium. Car in front of me (clapped out old Accord) with no brake lights locks up the brakes, I do the same but not quick enough and tagged their bumper.
Bent forks, busted brake lever, toasted fender with near impossible to match custom paint. Broke two bones in my left wrist. Now I can't even start the Porsche let alone work on it.
Had a buddy come over and start the car today. Squeal is almost gone but can still slightly hear it in engine compartment but not from inside the car. Guess the car will be sitting for a while.
shut off your A/C and defrost next time you start it.I'm sure somebody already said it,but try it without the serpentine belt.Very light silicone spray in the shaft of idler pulley.Sorry to hear about your bike incident.
hope all is well.
Try running the car without the belt, that will help determine if its from that area. A few moments of running will be ok. Removing the belt is probably the easiest thing you can do on any car I've ever worked on. Here is a quick video for help.
You Tube
Spork: Dam Dude! Glad you are going to be ok. Rode dirt and street bikes for many years. Got older and fear over-came my bravado. Cars are troublesome for "scooters". I did one a--hole over elbows on the street after "meeting" a car. Not fun. Heal up and be careful.
This is a source reference. Confirm exact model applicability in the original material.
