Where is this rattling sound coming from when I first start the car up in the morning?

40

Asked by Dec 16, 2015 at 04:44 PM about the 2006 Jeep Liberty Limited

Question type: Maintenance & Repair

When I first start my car in the morning it makes a
rattling sound, but later on in the day when I start it
up it sounds perfectly fine.

10 Answers

96,315

What engine do you have?

96,315

The V6 is overhead cam so I suppose you might be hearing the cam chain rattle until oil pressure comes up.

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Best Answer Mark helpful
40

I do have a v6.. So are you saying its loose?? Do you think it's fixable or do I have just replace it??

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96,315

I am saying that MIGHT be the source of the noise. If it is minor and quits after a couple of seconds then I would not worry about it. If it rattles for a long time then I would look at replacing the chain an/or the chain tensioner. Do you change your oil regularly? If your oil gets really dirty, the oil passage to the tensioner might be partially plugged up.

1 of 1 people found this helpful.
96,315

If you live where it gets really cold, do you use a winter weight oil in your car? Thick, cold oil takes longer to build pressure when the engine is first started.

1 of 1 people found this helpful.
40

Yea I think that might be the issue.. Thick oil... I use regular 10w penzoil and it didn't have any problem during the summer

2 of 2 people found this helpful.
40

At least I know what to check when I get home... Thanks @Full_of_Regrets

1 of 1 people found this helpful.
96,315

Your owners manual will give oil recommendations for colder weather. Maybe you should change to a 5W-30.

1 of 1 people found this helpful.

Beginning in 2008 Toyota, Honda, and many manufacturers call for 0W20. So don't be afraid 5W30 is too light. Year round. The chain also has a guide, to keep it in place that needs good lubrication, the chain running along the guide that is several inches long

1 of 1 people found this helpful.

Like so, click for full screen. Just think of the lubrication needed

1 of 1 people found this helpful.

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