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Paterson12
Newbie


Joined: 30 Dec 2015
Posts: 9
Location: South Yorkshire


PostPosted: Thu May 04, 2017 2:22 pm    Post subject: Horrendous intermittent noise at startup Reply with quote

Hello

So every so often when I start my Cayman I get a brief (less than 2 seconds) noise coming from the engine. It's hard to describe but it sounds kind of like a metallic whining noise. It makes no difference whether the car is hot or cold and it doesn't happen often.

The belts were changed 6 months ago so I doubt its that.

I'm suspecting the starter motor but I'd like to hear other people's opinions/experiences of this before I swap it?

Cheers
 
  
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isysman
Zolder


Joined: 22 Apr 2011
Posts: 5332
Location: Cheshire


PostPosted: Thu May 04, 2017 2:47 pm    Post subject: Reply with quote

Record it and post it. Hard to tell from your description.
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116618LN
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Joined: 30 Apr 2017
Posts: 14
Location: London/Dubai


PostPosted: Thu May 04, 2017 2:53 pm    Post subject: Reply with quote

If I leave my 997 parked for some time, initially it makes a horrid noise until oil has been pumped around for about 1-2 seconds.
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Leon1davies
Montreal


Joined: 04 Oct 2015
Posts: 602
Location: Bournemouth


PostPosted: Thu May 04, 2017 5:47 pm    Post subject: Reply with quote

What oil are you using and how many miles has the car done?
 
  
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Paterson12
Newbie


Joined: 30 Dec 2015
Posts: 9
Location: South Yorkshire


PostPosted: Thu May 04, 2017 5:54 pm    Post subject: Reply with quote

The car has done 30k miles and is running on 0W-40 I believe.

I've got an in car camera, if I can hear the noise I'll try and upload it.
 
  
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Halcyon
Montreal


Joined: 02 Nov 2015
Posts: 587
Location: Somerset


PostPosted: Thu May 04, 2017 6:01 pm    Post subject: Reply with quote

if it's high-pitched, it might be the secondary air injection pump?

But until we hear it, there's no way of being sure Thumb
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Demort
Paul Ricard


Joined: 21 Mar 2015
Posts: 3014
Location: Sussex


PostPosted: Thu May 04, 2017 7:40 pm    Post subject: Reply with quote

Starter Motor hanging on .. rather loud and annoying .
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Stoo.c
Trainee


Joined: 07 Apr 2014
Posts: 60
Location: Hertfordshire


PostPosted: Fri May 05, 2017 9:37 am    Post subject: Reply with quote

My 996 did something similar after I put the new engine in - I'd forgotten to top up the PAS fluid. This is probably not your issue but something worth checking.
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Paterson12
Newbie


Joined: 30 Dec 2015
Posts: 9
Location: South Yorkshire


PostPosted: Fri May 05, 2017 10:59 am    Post subject: Reply with quote

Yes I did check the PAS fluid and it was within limits. It would have been nice of Porsche to have put it outside of the engine compartment in the Caymans!

I'm still betting on the starter motor. It hasn't made the noise in a while so for now I'm just going to monitor it.
 
  
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