I tried this post under 1stGen Tundra section with no response...pretty busy forum.
I guess I've recently joined the club for serpintine belt chirping noises!!
I have a 2001 Tundra with the 4.7, with 104,000 miles on it. It has run flawless. At 89,000, had the the timing belt, water pump replaced but I don't think the tensioner was changed.
This past week, the chirping from the serpintine belt/tensioner/clutch fan had started. It only does it on a cold engine and at idle speed. It doesn't last long and usually subsides in 10-15 miles. I do hear it a little chirping when the engine upshifts through the gears when the RPMs are around 2500 - 3000 but it quickly goes away when in the next gear (slower RPM) or in overdrive.
I'm having a little trouble exactly locating the source, it is in the tensioner/clutch fan vicinity. I see where switching to the gaterback belt has worked for some, but if it's a tensioner problem, I haven't fixed it with the belt replacement.
In one thread, it describes the fix from a TSB that involves a new tensioner and newly designed air compressor monting bracket...$800 later some still have the problem.
Given my description and the RPMs it occurs, what do you think is the culprit?
Thanks in advance.