ENGINE WHISTLE

2003 Jaguar X-Type

Tiny

mayfield63

December, 12, 2008 AT 1:04 PM

Noises problem
2003 Jaguar X-Type 6 cyl All Wheel Drive Automatic 108000 miles

I have a whistling sound coming from my engine. It only started when the weather got colder. If I warm up the car for about 10 minutes, the noise may or may not appear, but if I don't, it is always there and lasts until the car gets warmed up. When I first drive the car, the whistling noise starts about about 30 mph and the whistle goes up in pitch and then down in pitch as soon as I brake to stop. But if I push on the gas and accelerate fast, the noise goes away. The whistling is usually only there the first time I accelerate and the first time I stop, but then usually goes away, but not always. What do you think the problem is?

7 Answers

Tiny

James W.

December, 12, 2008 AT 5:30 PM

I'm assuming the car runs ok, in spite of the whistle. Does it whistle any particular tune? Now I'm being facetious. When you cold start the car does it " whistle" at an idle or only when you 're moving? If may be something in the air intake system. Please advise.

Tiny

mayfield63

December, 13, 2008 AT 12:16 AM

The car runs fine and it doesn't whistle while idling. Only whistles when I first start driving and get up to 25-30 mph and the first time I brake to stop. Then the whistle usually stops.

Tiny

James W.

December, 13, 2008 AT 12:33 AM

It could be just a belt. Before you take off on a cold start sometime, Take a spray bottle of plain water and spray the fan belts down. If the whistle goes away after a couple of trys, you may just need a belt. Let me know.

Tiny

shanon

January, 23, 2011 AT 4:59 PM

Mayfield, Im having the same problem with my jag, So what ended up being the problem?

Tiny

KHLow2008

February, 11, 2012 AT 6:00 AM

Sounds like a vacuum leak and as it is affected by braking, I wouls suggest checking the brake booster vacuum one-way valve.

Tiny

m3gtr8

April, 20, 2012 AT 3:05 PM

True, vaccum leaks and brake booster valve, very common on x-type.

Tiny

rivermikerat

May, 6, 2012 AT 7:29 PM

If it isn't the one way valve, it could also be the booster front seal between the booster and the master cylinder.

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