Hello,
Does anyone know why my S type 57 plate 3L petrol has a strange whirring noise on a cold start up, it lasts between 60 to 90 seconds and then disappears and only with a cold engine, if the car stops for 15 mins and i start it back up no noise. Its loud enough that a few people have commented in the car and walking past.
Many thanks
Mark

 

Is the starter motor staying in-gauged ?

 

The serpentine belt is way past its use by date.

When it warms up, about 90 seconds or so, the belt gets "softer" and shuts up, noise gone, until it cools overnight again.

OH, and Welcome to the Forum.

Plese do an intro in the New Members Area when time permits.

Also, a "57" plate ID, means ZIP to anyone outside the UK, including me, so the actual build date, month and year, added to tour Sig, will always get the correct answers for any question you ask.

 

That's also the symptoms of a delaminating crank damper. Better mark it so you can eliminate that as a cause factor.

 

Hello Guys,
Thank you for your responses, im thinking i should get it in the garage now as its beyond my capabilities. I initially was thinking starter motor due to the volume as when concentrating on the noise more this morning it does sound like a wind down when the noise stops rather than the belt getting warmer, i also dont know when the belt was last changed. Aholbro1's reply is just scary to me
Thanks again.

 

AND, when was the power steer fluid last changed. That pump can/will make a wierd noise when cold, and settle down once warmed up.

Fresh fluid does wonders for any power steer pump/system. very 2 years is my benchmark.

 

Nothing to fear.....
damper delamination is one of the most forgiving failures you can have. Yes, it can be expensive and/or time-consuming to fix. Usually (2/3 I've had) they make a high-pitched chirp or squeal like a slipping belt on cold start and then go away, never to be heard from again until 8+ hours "off" time. That was the Excursion and S-Type 3.0L anyway...my X300 made more of a rumble or clanking sound. So your description of the sound did not really make me think "damper failure" but rather the fact that it only occurs on first start of the day for a few minutes. I've come to realize they can make differing sounds. On the bright side, you generally have nearly a year of use from first onset of noise until it starts shedding and/or shredding drive belts!
Easy diagnosis:
Find your crankshaft pulley;
take some white-out, a dab of brightly colored paint...or even a Sharpie...what have you
locate the rubber-like polymer portion of the pulley
make alignment marks on the metal bits on either side of the polymer.
Go about your normal business
In a day or a week, but after a few starts and at least modest runs on the car, check your marks. If they are still aligned, that's not your problem. If they've separated, start shopping for a replacement damper - OR you could have yours rebuilt but you'll be down for a week, minimum, possibly 2 or 3, as you must remove it, send it out for refurbishment, then await it's return.

 

Good idea, thank you Aholbro1

 

Have you tried listening with bonnet up as someone else starts the car, preferably after it's rested for 8+ hours? Might be able to pinpoint the source of the sound better.

 

I have the same issue with my 2008 Jaguar S-Type. The noice lasts for a couple of minutes and then it goes away. the sound is very similar to an electric motor. when it stops, it makes the typical noise of a motor whinding down.
I am curious to see if you found a solution already. Thanks

 

What was the result of trying the things posted before such as in #9?

 

From year 2003 forward the S-Type has an electronic emergency brake that disengages automatically when ignition key is turned, then re-engages when the ignition is shut off. It emits an audible whirring noise for about 2 seconds. You can replicate these actions, and the brake whirring, manually by pulling the brake lever up or pushing it down to disengage.
Is it possible you are hearing this?

 

SOLVED (well, sort of solved LOL).
It turns out that my 2008 Jaguar (and probably other years/models too) has a secondary Air Injection Pump.
This has gone bad, on my jaguar. I saw a video that suggest to also replace the Secondary Air Pump Valve, which I will do as well.
I will post here after I replace both.
Thank you for all the help.