2002 4.0 Tapping/Knock

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Oct 17, 2022 | 08:47 PM

#11

judderman

Thread Starter

Overlanding

Joined: Aug 2022

Posts: 19

Likes: 3

Quote:

Originally Posted by Extinct

If that fan comes apart due to wp bearing failure it will take out your trans, ps, and oil cooler hoses. Ask me how I know....

I’ll take that as warning enough to spend the extra time to get my truck and trailer!

Last edited by judderman; Oct 17, 2022 at 10:20 PM.

Oct 19, 2022 | 03:31 AM

#12

harrydarwen

4wd Low

Joined: Oct 2022

Posts: 8

Likes: 0

Easy to diagnose. Take the belt off (fan cowl and fan off) ... then skinny spinny each by hand and I bet you find the issue. Careful you don't knock a hole in the radiator when pulling the fan -- and careful with the plastic water hose that goes from drivers side radiator over to the coolant expansion tank.

Nox Vidmate VLC

Last edited by harrydarwen; Oct 19, 2022 at 09:01 AM.

Oct 19, 2022 | 02:55 PM

#13

judderman

Thread Starter

Overlanding

Joined: Aug 2022

Posts: 19

Likes: 3

Quote:

Originally Posted by harrydarwen

Nox Vidmate VLC

thanks!

its most certainly the water pump, but I’ll change out the idler pulley too and probably the belt (keep the current as a spare) whilst I’m in there messing around

Oct 19, 2022 | 06:22 PM

#14

nashvegas

TReK

Joined: Oct 2007

Posts: 2,773

Likes: 1,982

From: Whidbey Island, PNW

Yep I've found when the idler pulleys feel even a little gritty (nice description) it's good to replace them as well.

Oct 19, 2022 | 06:52 PM

#15

Extinct

Baja

Joined: Feb 2013

Posts: 5,272

Likes: 1,810

From: Lynchburg VA

Quote:

Originally Posted by nashvegas

Yep I've found when the idler pulleys feel even a little gritty (nice description) it's good to replace them as well.

THIS! If you can feel a bearing, its bad. If you can't feel it, but you can wiggle it a across the major axis, its bad. And they go down fast from there at engine rpm.