460 knock

Reply Subscribe

Thread Tools

Search this Thread

Apr 1, 2009 | 08:37 PM

ahmincha

Thread Starter

Junior User

Joined: Nov 2003

Posts: 64

Likes: 0

460 knock

Hi everyone I have a 89 superduty with a 460. It started making a knocking noise the other day. The noise seems to be front passenger side front of motor.Oil pressure at start up is 80 psi @ idle when warm drops to 30 psi @ idle but goes up to 70 psi when i raise rpms. Also noise seems to go away or lesson under load Does this sound like a bad bearing All help will be appreciated Thanks

Apr 1, 2009 | 09:40 PM

ameinig

Senior User

Joined: Sep 2007

Posts: 240

Likes: 1

Is it an automatic? If so, I would check the converter bolts. You could also make sure that the noise is not coming from the crank pulley or any of the accessories. Try running the motor briefly without the accessory belt.
Good Luck!

Apr 1, 2009 | 09:47 PM

ahmincha

Thread Starter

Junior User

Joined: Nov 2003

Posts: 64

Likes: 0

manual i will try belt less thanks

Apr 2, 2009 | 09:51 AM

krewat

FTE Leadership Emeritus

Joined: Jul 2002

Posts: 42,561

Likes: 420

From: Long Island USA

Check the timing chain. The passenger side of the chain is the slack side, and if it's loose enough might bang into the timing cover.

Apr 2, 2009 | 07:22 PM

ahmincha

Thread Starter

Junior User

Joined: Nov 2003

Posts: 64

Likes: 0

Ill check that i did compretion check today #1 125 #3 134 #5 140 #7 145 #2 145 #4 145 #6 145 #8 148 i also noticed noise dont start till warmed up could it be valve train