The main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool.
Most manufactures recommend changing the Timing belt at around 60,000 miles / 100,000 Km or 7 years, whichever comes first. They have been known to last a lot longer than that but it is cheaper to have it replaced than to risk critical and expensive engine damage if it breaks.
264 questions posted
Usually answered in minutes!
1,131 Questions
1,082 Questions
1,047 Questions
517 Questions
500 Questions