This car ie extremely sludged up under the valve cover. There is a knocking noise coming from the upper timing chain. Looking at it visually reveals nothing. How can we tell if the knocking is coming from the upper chain tensioner or the vanos system. With the...

FIX posted 12/7/1998

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle