My Flat Tappet Cam Wiped Out So I Decided To Go Roller

[PlayingWithTBI]

Tomorrow we're gonna check a couple things, 1st thing I'm gonna pull the serpentine belt and start it, just on the outside chance something's seized up - I doubt that. Then I wanna look at the timing set. I ordered what seemed to be the right things -

The cam retainer plate which came with button head screws, maybe one or both backed out?

The timing set for the smaller nose on the cam. It came with a thrust bearing which pulled the cam forward a little when tightening the 3 bolts. I'm guessing when running the cam gear runs against the retainer plate. When assembling them, we did gob some assembly lube all over it.

I've been thinking about this (I know), I've been reading about folks drilling a hole in each oil gallery plug in the front. My Mr Goodwrench long block doesn't have any holes in them. Can that cause the thrust bearing to dry up and seize, making the loud metal on metal grinding sound?

Based on what we find we'll look at the cam nose and pull the valve covers and check lifter preload before diving any deeper.

Any ideas/suggestions?

 

[Supercharged111]

See what's in the oil pan? If it's a mess you know there's no easy way out.

 

[CrustyJunker]

Ohhh nooo, I don't like the sound of squealing. I hope a roller lifter didn't give up.

 

[PlayingWithTBI]

See what's in the oil pan? If it's a mess you know there's no easy way out.

Yeah, I'm trying to be optimistic.

Ohhh nooo, I don't like the sound of squealing. I hope a roller lifter didn't give up.

At first it sounded like a rod knock, only under acceleration. Then it got worse and now squeals at idle.

 

[Supercharged111]

So. . . when my LT1 let a rod bearing go, the 2 halves stacked up on the one side. I never had a knock, but I did have a squeal. It was the sound of the crank and the rod galling. I made 2 full pulls on the Dyno, car was down like 80whp.

 

[tayto]

The stock timing gear bolts the flang head is quite tall. ive had them rub on the timing cover and make a racket. i just run regular head bolts with blue loctite now.

 

[PlayingWithTBI]

ive had them rub on the timing cover and make a racket. i just run regular head bolts with blue loctite now.

I don't think that's the issue here. It ran quietly for a few trips before it started making the noise. Plus I have a deeper timing cover to clear the double roller chain.

How about not having little holes drilled through the oil gallery threaded plugs? Maybe the thrust bearing on the timing gear dried out and started grinding? This would be the best case scenario - maybe wishful thinking...

 

[letitsnow]

If it ends up being something major, I say swap in a turbo 5.3/6l80e combo.

 

[man-a-fre]

Tomorrow we're gonna check a couple things, 1st thing I'm gonna pull the serpentine belt and start it, just on the outside chance something's seized up - I doubt that. Then I wanna look at the timing set. I ordered what seemed to be the right things -

The cam retainer plate which came with button head screws, maybe one or both backed out?

The timing set for the smaller nose on the cam. It came with a thrust bearing which pulled the cam forward a little when tightening the 3 bolts. I'm guessing when running the cam gear runs against the retainer plate. When assembling them, we did gob some assembly lube all over it.

I've been thinking about this (I know), I've been reading about folks drilling a hole in each oil gallery plug in the front. My Mr Goodwrench long block doesn't have any holes in them. Can that cause the thrust bearing to dry up and seize, making the loud metal on metal grinding sound?

Based on what we find we'll look at the cam nose and pull the valve covers and check lifter preload before diving any deeper.

Any ideas/suggestions?

Working on the truck in the snow?

 

[PlayingWithTBI]

Working on the truck in the snow?

Well, it is kinda cold at 43° and a chance of rain but, it's inside my shop now.