460 noise
New User
Joined: Sep 2002
Posts: 19
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From: USA
460 noise
I recently bought an 85 F-250 4x4, with a stock 460. There seems to be a noise, and was told by several people, including a Ford mechanic, that it was in the top-end. They thought either a lifter of weak spring. I am preparing to change can, lifters, and springs, and timing chain and gears. I am waiting for parts to come in, but have the intake off, and can see that the cam seems to be "back", the lifters are only riding on 1/3 to 1/2 of the lifter. Any reason for this? Could the cam plate be worn or is there something else I should look for? Thanks.
Senior User
Joined: Mar 2000
Posts: 448
Likes: 1
From: Chimacum/Jefferson County
460 noise
That's a normal thing, it allows for lifter rotation while the engine is running.
77 F250 Highboy 4X4
"The Money Pit"
"If it wasn't for Chevy's my tools would rust"
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=10344&.jpg
77 F250 Highboy 4X4
"The Money Pit"
"If it wasn't for Chevy's my tools would rust"
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=10344&.jpg
Senior User
Joined: Mar 2000
Posts: 448
Likes: 1
From: Chimacum/Jefferson County
460 noise
[updated:LAST EDITED ON 01-16-03 AT 08:34 PM (EST)]Nope! Those cam lobes are pretty tough. These guy's can explain it better than I can.
When the cast core is made at the casting foundry, all the lobes are flame hardened. That process hardens all the lobes to a depth below the barrel of the core. That depth of hardness allows the finish cam grinder to finish grind the cam lobes with a Rockwell hardness above 50Rc. The generally accepted hardness on a finished cast cam should be between 48Rc to 58Rc
http://www.cranecams.com/instructions/valvetrain/camfail.htm
77 F250 Highboy 4X4
"The Money Pit"
"If it wasn't for Chevy's my tools would rust"
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=10344&.jpg
When the cast core is made at the casting foundry, all the lobes are flame hardened. That process hardens all the lobes to a depth below the barrel of the core. That depth of hardness allows the finish cam grinder to finish grind the cam lobes with a Rockwell hardness above 50Rc. The generally accepted hardness on a finished cast cam should be between 48Rc to 58Rc
http://www.cranecams.com/instructions/valvetrain/camfail.htm
77 F250 Highboy 4X4
"The Money Pit"
"If it wasn't for Chevy's my tools would rust"
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=10344&.jpg
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