I have a 2001 Tacoma 3.4L and recently have been hearing bearing rumble near the waterpump. Truck has 210,000 miles on it. I listened to all parts with a screwdriver and found the fan bracket was rumbling like a bad bearing. The part at dealer cost is about $300. Checked online and found one for about $60. I went for the $60 part. After installing the new part, started the truck and the rumble was back with gusto!!! I could even feel the rough bearing with a screwdriver. So, I took off the new part, tapped it with a screwdriver and it went clunk. I tapped the old part with the screwdriver and it rang. The new part must be cast Chinese, including the bearing!!!
So here is the free fix:
I have a hypodermic needle with a zerk fitting for a grease gun. Took the needle and slipped it between the seal and shaft on the back side of the fan bracket and pumped 5-6 pumps of grease into the bearing. Installed the fan bracket and started the truck. No noise, took the screwdriver and listened to the fan bracket and all I could hear was hmmmmmmm. Just like a new bearing!!!
So, if you have your fan bracket off for any reason, at any mileage, grease the bearing and you will save hundreds!!!