05 997.1S sooty left pipe and idle ticking noise
08-05-2018 | 06:38 PM
#1
Thread Starter
Intermediate
Joined: Aug 2018
Posts: 33
Likes: 2
05 997.1S sooty left pipe and idle ticking noise
Dear rennlisters,
My 2005 997.1S with 48000 miles has recently started with a few symptoms that im really worried about.
1- driver side (left exhaust tips) have become more black sooty than left ones. I heard This sometimes can be normal, sometimes not.
2- The engine started to have a tapping noise in idle (both hot or cold), if i leave it it neutral and increase the rpms the sound will tapping noise will sound faster.
3- i’ve found out that if i floor the car, a slight burned oil smell can be felt.
4- in terms of performance the car runs really well and normal. No performance loss.
5- I have been monitoring the oil consuption, which so far seems normal. 0.4 quartz in 400KM
6- Gas efficiency is 13km/100liter
Any ideas of what could this be? Spark plugs, valve lifters, air oil separator?
please dont tell me this could be bore scoring problem and i will have to rebuild the engine.
here is a video from another user with the exact sound.
My 2005 997.1S with 48000 miles has recently started with a few symptoms that im really worried about.
1- driver side (left exhaust tips) have become more black sooty than left ones. I heard This sometimes can be normal, sometimes not.
2- The engine started to have a tapping noise in idle (both hot or cold), if i leave it it neutral and increase the rpms the sound will tapping noise will sound faster.
3- i’ve found out that if i floor the car, a slight burned oil smell can be felt.
4- in terms of performance the car runs really well and normal. No performance loss.
5- I have been monitoring the oil consuption, which so far seems normal. 0.4 quartz in 400KM
6- Gas efficiency is 13km/100liter
Any ideas of what could this be? Spark plugs, valve lifters, air oil separator?
please dont tell me this could be bore scoring problem and i will have to rebuild the engine.
here is a video from another user with the exact sound.
08-05-2018 | 08:11 PM
#3
Three Wheelin'
Joined: Mar 2017
Posts: 1,340
Likes: 188
From: Texas
That oil consumption would be concerning if it was my car. .4 quarts for 250 miles is still within the Porsche standard of 1.5 liters per 622 miles, but I have never known anyone to burn that much oil without there being a problem.
08-05-2018 | 09:40 PM
#6
Three Wheelin'
Joined: Jun 2018
Posts: 1,457
Likes: 684
From: NJ, USA
Pop off the AOS intake to plenum tube (gently) by squeezing the tabs and see if oil is pooling there. The AOS vacuum source is across from the right bank so it gets pooled oil first during intake as it’s straight across.
Could be AOS + noisy lifter.- could be the other thing you don’t want to talk about.
Good luck! Keep us posted!
Could be AOS + noisy lifter.- could be the other thing you don’t want to talk about.
Good luck! Keep us posted!
08-06-2018 | 12:22 PM
#7
Three Wheelin'
Joined: May 2013
Posts: 1,262
Likes: 15
My '05 (non-S) had only symptom #2, starting around 60K miles. Shop found bad lifters. As my 3rd-party warranty was due to expire inside a year I opted to delve further rather than just go with a lifter job, and it was discovered it had that thing you don't want to hear about. However it wasn't visible with a scope through the plug holes because at that point it was just the piston skirts that had begun to wear and tip/slap (which was what made the ticking noise), the cylinder walls were as yet unscathed. It was only discoverable from underneath.
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08-06-2018 | 12:43 PM
#8
Three Wheelin'
Joined: Mar 2017
Posts: 1,340
Likes: 188
From: Texas
My '05 (non-S) had only symptom #2, starting around 60K miles. Shop found bad lifters. As my 3rd-party warranty was due to expire inside a year I opted to delve further rather than just go with a lifter job, and it was discovered it had that thing you don't want to hear about. However it wasn't visible with a scope through the plug holes because at that point it was just the piston skirts that had begun to wear and tip/slap (which was what made the ticking noise), the cylinder walls were as yet unscathed. It was only discoverable from underneath.
08-06-2018 | 04:39 PM
#9
Three Wheelin'
Joined: May 2013
Posts: 1,262
Likes: 15
I don't have firsthand experience doing it, so this is speculation based on general knowledge. I would think one might get eyes on the lower (well, inboard on a flat engine design) cylinder walls with the pan off and pistons at the top of their stroke, although whether it would be possible without a camera I don't know but renting one shouldn't be a big hassle. However, getting a look at the piston skirts I doubt would be possible because AFAIK they don't protrude from the cylinders at the bottom of the stroke. That's what was knackered on mine. The cylinders had not scored yet.
08-06-2018 | 05:20 PM
#10
Three Wheelin'
Joined: Oct 2017
Posts: 1,318
Likes: 422
From: INDY
Fiberoptic camera that attaches to your cell phone is available for around 30 bucks on Amazon. I have one and you can use it to take photos or videos in 1080p. If you're going to drop the pan to scope the cylinders, might as well get a camera to do it yourself.
08-06-2018 | 08:40 PM
#11
Three Wheelin'
Joined: Mar 2017
Posts: 1,340
Likes: 188
From: Texas
Thanks Jeebus31. I will get a camera for my phone.
08-06-2018 | 09:42 PM
#12
Three Wheelin'
Joined: Jun 2018
Posts: 1,457
Likes: 684
From: NJ, USA
I have this one and it’s great.
08-07-2018 | 08:50 PM
#14
Three Wheelin'
Joined: Mar 2017
Posts: 1,340
Likes: 188
From: Texas
