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SJD
Trainee


Joined: 02 Apr 2014
Posts: 54
Location: Perthshire


PostPosted: Mon Aug 05, 2019 11:05 am    Post subject: Ticking Noise at Idle Reply with quote

I have lived with an annoying ticking noise at idle for some time now.

I read in another post a response from deMort. As ever when such wisdom is shared I pay attention. Ticking noise at idle - brake booster / tandem pump... is this the same for a Gen 1?

I have a 2006 C4S. And before others wade in, it’s not associated with bore scoring. The tandem pump was replaced just over 5 years ago and the engine has had a FULL Hartech rebuild, all 6 cylinders soon after with only 24k miles on the clock. I had a new timing chain installed as ‘betterment’ during the rebuild.

Occasionally the ticking noise at idle isn’t there but majority of time it is. Car is now on 39k Miles. It doesn’t use oil and is religiously warmed up before any spirited driving.

I read info about chain tensioners and that there is little can be done to sort the ticking. Sticky hyd tappet has also been suggested.

Any advice on how to narrow this down without spending a small fortune “troubleshooting”?
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7580
Location: Brighton


PostPosted: Mon Aug 05, 2019 4:03 pm    Post subject: Reply with quote

Thats a rare fault and Gen 2 only .. it's a possible but highly unlikely fault based on that one post which was more related to the debris in the oil filter Smile

My guess is a sticking tappet due to the intermittent nature you have described .

Sound clip of it if possible with you walking around both sides of the car at the rear please .
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timbo1811
Silverstone


Joined: 13 Dec 2016
Posts: 129
Location: Dorset


PostPosted: Mon Aug 05, 2019 7:06 pm    Post subject: Reply with quote

I had a Boxster with a ticking noise you would have sworn was a tappet, turned out to be a loose plug.
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bazhart
Approved Trader


Joined: 20 May 2009
Posts: 984
Location: Bolton Lancashire


PostPosted: Wed Aug 07, 2019 5:48 am    Post subject: Reply with quote

We have posted various long and detailed replies about this problem that has many sources and sometimes cannot be found whatever you do, spend or replace.

Regarding the intermittent nature of the sound coming and going - there is another possible explanation. The engine management system slows down the tickover when the engine warms up and as it gets hotter and has several different speeds it lowers the revs (8 or 10 choices I think) - without showing it on the rev-counter.

So when you leave it ticking over the coolant temperature rises and falls as the fans kick in and out and sometimes results in the tickover speed dropping too low and resulting in this typical hydraulic tensioner weakness creating cam chain snatch causing the tick.

The tickover speed is detected once/rev so the engine can "hunt" at low revs between firing cylinders as it tries to balance slightly different individual cylinder performances at such small fuel delivery speeds and can result in the tickover being too slow as it tries to balance itself.

As we are in the hot weather I would check the radiator fans are working (or working soon enough) as this can influence that whole scenario.

Baz
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SJD
Trainee


Joined: 02 Apr 2014
Posts: 54
Location: Perthshire


PostPosted: Wed Aug 07, 2019 7:09 am    Post subject: Reply with quote

Thanks for all the feedback.

I’m struggling to upload a video clip, keeps coming up with “no post mode specified”?!?

Any ‘how to guides’ for a techno phobe?
 
  
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318touring
Spa-Francorchamps


Joined: 21 Jan 2011
Posts: 262
Location: Wellington, New Zealand


PostPosted: Wed Aug 07, 2019 8:30 am    Post subject: Reply with quote

Why don't you just upload it to youtube, and post the link here?

If you are using gmail and already logged in, go to youtube in a new tab. Upload it using their 'studio' or something. Really painless and effective.
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7580
Location: Brighton


PostPosted: Wed Aug 07, 2019 6:34 pm    Post subject: Reply with quote

SJD wrote:
Thanks for all the feedback.

I’m struggling to upload a video clip, keeps coming up with “no post mode specified”?!?

Any ‘how to guides’ for a techno phobe?


It has to be done via you tube , send me the file if you wish and i'll upload it and post it here .

De.Mort@virginmedia.com
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She's not going until july 2020 though .



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SJD
Trainee


Joined: 02 Apr 2014
Posts: 54
Location: Perthshire


PostPosted: Thu Aug 08, 2019 5:17 pm    Post subject: Reply with quote

deMort wrote:
SJD wrote:
Thanks for all the feedback.

I’m struggling to upload a video clip, keeps coming up with “no post mode specified”?!?

Any ‘how to guides’ for a techno phobe?


It has to be done via you tube , send me the file if you wish and i'll upload it and post it here .

De.Mort@virginmedia.com


I’ve sent you a couple of emails. See what you think. Thanks!
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7580
Location: Brighton


PostPosted: Thu Aug 08, 2019 5:50 pm    Post subject: Reply with quote

Videos uploaded for others to comment on ..

https://youtu.be/NEITqYOIrH8

https://youtu.be/Kk55VIuDAQQ
_________________
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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GMG
Nürburgring


Joined: 07 Jan 2018
Posts: 462
Location: Devon


PostPosted: Thu Aug 08, 2019 6:41 pm    Post subject: Reply with quote

...sounds pretty normal to me...these are noisy , mechanical engines which tend to amplify their internal workings owing to their flat configuration...

Mine has had £14k's worth of rebuild and sounds similar from memory; hardy ever drive it sadly...

Of course phone microphones do exaggerate the sounds recorded...[/list]
 
  
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GMG
Nürburgring


Joined: 07 Jan 2018
Posts: 462
Location: Devon


PostPosted: Sat Aug 17, 2019 6:51 am    Post subject: Reply with quote

...tbh I was surprised this post didn't receive more interest given the general anxieties around these engines...

Did you seek a view from a Porsche specialist?
 
  
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me&my997
Silverstone


Joined: 23 Mar 2019
Posts: 149
Location: Lancashire


PostPosted: Sat Aug 17, 2019 7:37 am    Post subject: Reply with quote

GMG wrote:
...sounds pretty normal to me...these are noisy , mechanical engines which tend to amplify their internal workings owing to their flat configuration...

Mine has had £14k's worth of rebuild and sounds similar from memory; hardy ever drive it sadly...

Of course phone microphones do exaggerate the sounds recorded...[/list]


Normal Surprised it don't sound like my 997 C4 Confused if that is normal then i'm happy mine isn't
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Last edited by me&my997 on Sat Aug 17, 2019 7:41 am; edited 1 time in total
 
  
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me&my997
Silverstone


Joined: 23 Mar 2019
Posts: 149
Location: Lancashire


PostPosted: Sat Aug 17, 2019 7:38 am    Post subject: Reply with quote

In the first clip the noise quickens with the increase in revs ,
If it was something just affecting tickover then that can't be right .
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GMG
Nürburgring


Joined: 07 Jan 2018
Posts: 462
Location: Devon


PostPosted: Sat Aug 17, 2019 8:28 am    Post subject: Reply with quote

...full hartech rebuild thus probably as baz has indicated; some just make a noise ? Are noisier than others...

Mine was serviced recently by Williams Crawford a very well respected Porsche Independent whom raised no issues stating mine was exemplary...
 
  
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timbo1811
Silverstone


Joined: 13 Dec 2016
Posts: 129
Location: Dorset


PostPosted: Sat Aug 17, 2019 1:13 pm    Post subject: Reply with quote

I'm sorry but that doesn't seem right to me... especially as it was rebuilt not so long ago.
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alpinaman
Montreal


Joined: 21 Feb 2012
Posts: 580



PostPosted: Sat Aug 17, 2019 2:18 pm    Post subject: Reply with quote

Thats not "normal".Its an awful noise.

I sounds like collapsed lifter(s) to me.
 
  
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monster
Imola


Joined: 04 Sep 2010
Posts: 788
Location: Bournemouth


PostPosted: Sat Aug 17, 2019 4:40 pm    Post subject: Reply with quote

A blowing exhaust can sometimes make a similar sound....
 
  
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me&my997
Silverstone


Joined: 23 Mar 2019
Posts: 149
Location: Lancashire


PostPosted: Sat Aug 17, 2019 4:44 pm    Post subject: Reply with quote

monster wrote:
A blowing exhaust can sometimes make a similar sound....


Have you listened to the clips Surprised
_________________
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997 C4 / back in the game - 2019
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jl-c
Monza


Joined: 22 Jul 2013
Posts: 238
Location: Shropshire


PostPosted: Sat Aug 17, 2019 5:51 pm    Post subject: Reply with quote

me&my997 wrote:
monster wrote:
A blowing exhaust can sometimes make a similar sound....


Have you listened to the clips Surprised


You'd be suprised, a manifold crack can sound just like that, however I agree, it doesn't sound right.
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7580
Location: Brighton


PostPosted: Sat Aug 17, 2019 6:48 pm    Post subject: Reply with quote

I answered via email my thoughts on this .. to be fair ill post it here ..



I've just uploaded the videos and posted them on the forum for others to
comment on ..

For me .. that's not a tappet sticking .. it does sound more chain related
, a little louder than i would have liked .

It seems to be more bank 2 so the o/s/r of the car .. it would be worth just
making sure all the plugs are tight on that bank as was mentioned on your
post .

I do know that rebuilt engines can have a chain type noise and there isn't
anything you can really do about it .

As with all videos of noises it may well be louder or quieter in real life
than the recordings shows , as such i would like , when ever you get the
chance just to get an Indy to have a listen and confirm its not a problem .

lets put it this way .. i have in the past told one guy not to start his car
again and to get it recovered on the forum .. with you its a noise I'm not
worried about as such but would like someone to listen to the car instead of
remotely like i am.

Basically it needs to go on a ramp and confirm the noise is from the
tensioner area that side .



i've not had a reply so can't comment further and my " help " wasn't that good .. . i don't have an answer basically .
_________________
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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