appear

That is very interesting - thank you for chiming in!

If im more than 1m away from the car I can't hear the clacking sound at all. Unfortunately I don't know other 993 owners (approx 15 in total in the country at this point) so I have nothing to compare the sound of my engine with.

If anyone would be so kind as to make a recording from inside the left wheel arch that would be very helpful.

I have booked appointments with two porsche specialists to have the following thoroughly examined: ignition system (plugs, wires, distributor belt and rotor), exhaust leaks incl. head to heat exchanger, knock sensors, MAFS, oxysensor and injectors.

Suggestions to other things to check out while the car is on the lift are more than welcome!

AOW162435

I vote for exhaust leak.


Andreas

gaby1088

newb alert haha

at what second mark is the noise in question?

appear

It's actually all the way through the sound clip - it's the metallic clacking sound that follows the revs :-/ If you listen to the entire clip the sound is much louder in the beginning and the end.

frankv

Hi, the sound clip posted at the beginning of the thread is exactly what mine sounds like only from the right passenger side. This was a sudden and noticeable change today from my 'normal' sound so I know something is amiss (the car has sat for 2-3 weeks). The sound does not not change after the engine warms up and is quite apparent both from inside the cabin and more than a few metres away, and it audible through the whole RPM range.

I am thinking lifters but was wondering if you were able to determine the problem and solve .. since you had already done the lifters. Any insight welcome.

Frank

alcanada

appear, I downloaded the app and recorded the engine sound for you. The link is:

http://soundcloud.com/releasegrease/...nesday-night-1

I hope it works.

I held my ipad about 1' away from the car and 2' above ground. The sound track starts at the driver rear wheel (about 6 seconds) and I went around the rear to the passenger side rear wheel (about 6 seconds). You can hear the Fister II exhausts as I moved around.

The recording was done on a cold start.

wolfturbo

Do a compression check.

I had a similar noise, did a compression check and a leak down. Turned out to be a broken valve spring.

How does the car run??

appear

THANKS!! Must say your car sound a whole lot nicer than mine does! No tapping or worring noises at all!

My car is currently in the shop awaiting further diagnosis, however the garage is currently so backed up, that after 2 weeks in the garage they are only just now beginning to diagnose the car. Longest two weeks of my adult life.

I really appreciate that you did this - thanks!

The car runs pretty sweet, however the shop did mention that it could be a valve spring. I will call them tomorrow and ask them to check that out - thanks for sharing your experience.

vern1

Any ending to this story?? I have just begun to have this issue and am going to try and tackle it at some point. Loud ticking on the drivers side which goes away once the car is warmed up.

Just wondering what your issue turned out to be given it wasnt the lifters

Thanks

appear

Hi Vern

Sorry about not updating this thread with the end to this story. I believe some ticking until the car is warmed up is, in most cases, just lifters - so I would begin by replacing the 6 exhaust-side lifters, and perhaps consider a thicker oil in case you run 0W40 now. In my case new lifers (all 12) did help somewhat, but I still had noticeable ticking for the first 5-6 minutes on every morning drive. Furthermore I had some valve-noises at higher revs, when the car was fully warmed up.

I ended up going through a full top end rebuild w. new guides (from Steve Weiner), fresh valves and the usual while you're in there stuff. Now my car sounds better with no ticking on every morning drive and no loud valve-noises at acceleration. However, when the car sits for a period of a few days I can hear slight ticking on the very first light acceleration (within 1 minute of starting the car), but if I never had the ticking issue I would probably never have noticed those sounds.

Good luck, and please let me know if you have any questions.

vern1

Thanks appear.

So it was not an exhaust problem or a short etc. You ended up needing a full top end with valves etc to solve the problem.

My car has been in storage most of the summer (have been driving the 997S) and the issue appeared when I fired it up the other day. One guy said that this is normal for the lifters to not hold the charge for this long and its only a bigger issue if it starts to happen when the car has only been sitting for a day or 2

MarkD

almost definitely lifters needing to "pump up" in your case, based on your scenario
if it goes away when the car warms up, great.
eventually it won't go away but that can be many miles down the road

appear

No, it wasn't an issue with the exhaust or catalytic converter. I have an RSR-exhaust and a Sportscat on my car that makes some exaggerated rear-end noise, which at the time contributed to my aircooled-noise-paranoia. When I got the car on a lift it was pretty clear that the ticking noises came from the top part of the engine.

Since you have just had your car in storage I believe the ticking can be quite normal. Try to run it regularly over the next week and see if it goes away - maybe see if an italian tune-up will cure the ticking Replacing exhaust-lifters is not an engine-out job ($$) and it's one of those things you'll most likely need to replace sooner or later anyways. The tiny hydraulic lifters in our cars have a plastic-membrane that probably will harden/crack if they are left unused for a longer period of time. Maybe yours either needs to be brought back to life by some regular driving or simply replaced.

If your oil consumption is good and you don't have excessive smoking from the exhaust I don't see a engine-rebuild in your immediate future!

vern1

Thanks. I noticed this issue the last time i took the car out of storage. it ticked at the beginning and then fine and no ticking when i started it for the rest of the week. Hopefully its a bigger issue for some time in the future!

vern1

Well i have a fister stage 3 on my cab so you can hardly hear anything over it!!

Oil consumtion is non existent so will just have to keep an ear on the lifter

Thanks for the advice guys - i feel bettr now!!