Joined: 30 Dec 2015 Posts: 10 Location: South Yorkshire
Posted: Thu May 04, 2017 1:22 pm Post subject: Horrendous intermittent noise at startup
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?
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. _________________ 09 997tt - Build in progress
79 911 targa
Leon1davies Hockenheim
Joined: 04 Oct 2015 Posts: 675 Location: Bournemouth
Posted: Thu May 04, 2017 4:47 pm Post subject:
What oil are you using and how many miles has the car done?
Paterson12 Newbie
Joined: 30 Dec 2015 Posts: 10 Location: South Yorkshire
Posted: Thu May 04, 2017 4:54 pm Post subject:
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.
Halcyon Hockenheim
Joined: 02 Nov 2015 Posts: 698 Location: Somerset
Posted: Thu May 04, 2017 5:01 pm Post subject:
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 _________________ 996.2 Carrera 4 Convertible Tip
deMort Shanghai
Joined: 21 Mar 2015 Posts: 4600 Location: Brighton
Posted: Thu May 04, 2017 6:40 pm Post subject:
Starter Motor hanging on .. rather loud and annoying . _________________
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. _________________ 02 996 C4S
93 Skyline R33 GTS-t
91 CRX vtec turbo
01 986 Boxster S
Paterson12 Newbie
Joined: 30 Dec 2015 Posts: 10 Location: South Yorkshire
Posted: Fri May 05, 2017 9:59 am Post subject:
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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