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My 2002 xl7 makes an extremely loud noise..oil change..it ran fine

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My 2002 XL7 makes an...
My 2002 XL7 makes an extremely loud noise and always sounds like it needs an oil change while driving - more standard noise than just the regular running of the engine. I was told by the mechanic that there is some kind of default in that year and model of the car and it is just standard. i actually had a used engine put in after the 1st one burned out /died and it ran fine for a short time and now the noise is back - please help!!!!
Submitted: 7 years ago.Category: Car
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Answered in 23 minutes by:
6/1/2010
Auto Mechanic: FixItMan, Master Technician replied 7 years ago
FixItMan
FixItMan, Master Technician
Category: Car
Satisfied Customers: 17,560
Experience: AA DEGREE AUTOMOTIVE/DIESEL TECH
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Hello JACUSTOMER, does the noise increase with engine speed or with vehicle speed?
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Customer reply replied 7 years ago
Not particularly - I am almost immune to it I dont notice more noise than usual while driving.
Auto Mechanic: FixItMan, Master Technician replied 7 years ago
Do you hear the noise if the vehicle is stationary and you are just reving the engine?
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Customer reply replied 7 years ago
When I start the engine it is just loud w/o driving. Kind of reminds you of how a school bus woud sound while idling but not as loud.
Auto Mechanic: FixItMan, Master Technician replied 7 years ago
Okay. THis is commonly from the timing chain on the vehicle. It is common for the timing chain tensioner to fail and make this noise.
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Customer reply replied 7 years ago
What about an oil detergent/ engine oil supplement - I have heard that with each oil change I should use that to help clear up the noise.
Auto Mechanic: FixItMan, Master Technician replied 7 years ago
If the chain tensioner is already bad then this will not help. It does not hurt to try though.
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FixItMan
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