Serpintine Belt "chirping"

[KDTundra]

Hi Folks,

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.

Kevin

[LGL002]

Hi Folks,

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.

Kevin

I couldn't determine if you'd changed the belt yet to a Gatorback and if you haven't I certainly would do that first as the cheapest try. If that's not effective then just replace the tensioner pulley assembly without the other stuff

Larry

[apurazzo]

replace with a Gatorback belt first if it was nat changed yet..

[KDTundra]

LGL002 and apurazzo,

Thanks...I have not installed the Gatorback belt. I believe it's part # 4060905 for about $42. I'll try and drop ya a line.

Kevin.

[Salty_Dog]

I had a similar problem and it wasn't the belt. It was the idler pulley. Replaced the idler pulley and the problem went away.

[mustang67408]

Most of the time it is the belt and we have started to use the GATES belt not the Toyota one and have had good success.