What causes chirping at start up

Asked by Aug 10, 2016 at 03:01 PM about the 2005 Lincoln Town Car Signature L

Question type: Maintenance & Repair

I noticed a chirping from under the hood when I first start my car.  I do not notice it if the car has been driven a bit, parked and then started again even an hour later

3 Answers

15,285

Serpentine belt, idler pulleys and belt tensioner should all be inspected, Standard procedure is to change them out at 80,000 miles.

2 people found this helpful.
36,055

Last time I had a noticeable chirping it was from the cam position sensor assembly. That was in a Ford CV with 4.6L. If your serpentine belt and pulleys check out ok then take a look at the cam sensor assembly. They're noted for chirping noises in Fords and Lincolns.

1 people found this helpful.
65,565

Pull the serpentine belt off and start it to see if the noise goes away. Don't run it without the belt for more than a minute or so. I am betting it is the belt tensioner or an idler, but could be something else.

1 people found this helpful.

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