Stock Cam Bearing Walk

[Marty]

Has anyone else ever seen this?

 

[PTSUPERD]

Cam walk and cracked block on the PTSUPERD.

[/IMG]

 

[Hotrodtractor]

Is that a rebuilt motor Marty? I've seen where the tolerances on the cam bores are a bit on the large side and the cam bearings don't have the right press fit. I've never seen it on a high mileage motor from the factory though - unless its cracked...

 

[Powerstroke Racer]

Cracked block, I have the same set of pics.

Is that on the 4th cap?

 

[PTSUPERD]

Shuperior tyooning...

 

[Powerstroke Racer]

Shuperior tyooning...

Do I need to call your bossoke:LOL

 

[PTSUPERD]

Do I need to call your bossoke:LOL

LOL.

 

[Marty]

3rd and 5th walked towards each other. Four fell out.

 

[JLDickmon]

Too many Wal-Mart bags...
:doh: LOL

 

[Bean]

Only seen it on cracked blocks.

 

[Dieselboy.]

What would cause that ? High RPM ? Over rev with no load, ie. Hitting nuetral on a pull etc

 

[Whytry]

It doesn't look to pretty

 

[TrailerHauler]

Is the block cracked marty?

 

[Super 6.0]

iv seen a block crack through all the webs and the crank mains but my first guess would be a bad fit on the bearings. maybe the tolerance was too far out?

 

[Big Bore]

Are those roller lifters?

 

[Hotrodtractor]

Are those roller lifters?

Probably the same roller lifter that is in every 7.3. They are hydraulic rollers from the factory.

 

[Big Bore]

Probably the same roller lifter that is in every 7.3. They are hydraulic rollers from the factory.

I was wondering about that. All the blocks I've been in still had the cam in place. Now how about the source for those roller rockers?oke:

I've been concerned about the possible increased wear on stock rockers from high pressure springs.

Pardon the thread jack Marty.

 

[Marty]

I haven't looked at it since.... been way too busy honestly. I hope by the end of next week I will be caught up.