Dreaded Timing Chain Noise--worse?
Well, the timing chain had been quiet except for a few seconds on start-up. Now, its there most of the time-all of a sudden. Seems to quiet down at 1800 RPM or so.
Engine has 102,000 miles.
Pulled valve covers, chain looks tight, no slack. Local mechanic said it looks good also. Compression check is good in all cylinders.
Maybe replace hydraulic tensioners, they are original?
Checked exhaust, cats, they seem fine.