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FixItMan, Master Technician
Category: Car
Satisfied Customers: 17327
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My 2002 xl7 makes an extremely loud noise..oil ran fine

Customer Question

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
Expert:  FixItMan replied 7 years ago.
Hello JACUSTOMER, does the noise increase with engine speed or with vehicle speed?
Customer: replied 7 years ago.
Not particularly - I am almost immune to it I dont notice more noise than usual while driving.
Expert:  FixItMan replied 7 years ago.
Do you hear the noise if the vehicle is stationary and you are just reving the engine?
Customer: 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.
Expert:  FixItMan 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.
Customer: 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.
Expert:  FixItMan replied 7 years ago.
If the chain tensioner is already bad then this will not help. It does not hurt to try though.