[blown70]

I'm confused on what I should use...Solid roller,gear drive,stock tin cover. Do I want a nylon button or aluminum or torington.And I want .005 clearance?Right?

 

[JIM]

BBC I assume? Stock BBC tin cover is supposedly good/firm enough for a cam button. Use nylon, it is cheap, easy to set and has no parts that can fail and end up in your oil pan. .005" is fine, probably as tight as you want to go. .004" - .012" is OK. (My limited opinion/experience of course)

 

[blown70]

BBC I assume? Stock BBC tin cover is supposedly good/firm enough for a cam button. Use nylon, it is cheap, easy to set and has no parts that can fail and end up in your oil pan. .005" is fine, probably as tight as you want to go. .004" - .012" is OK. (My limited opinion/experience of course)

K-Thanx

 

[cstraub]

Use a good USA made Roller button that used REAL Torrington brand bearings and you won't have a problem . . .like the ones I make for the industry...chinese bearings are .70 each, Torrington gets $2 each.

 

[Lilracr]

With any flat tappet cam the lobes are ground to hold the cam to the rear of the block, or up against the timing gear. A roller cam is ground flat and needs a button to keep it from walking.

The .005 is what I shoot for.

Just make sure you have a good cover and make sure you set the clearance with the same timing cover gasket and the cover fully tight.

.005 is not much room, and you do not want a nylon button too tight.

-Bobby-

 

[Sandy]

I have yet to try this, but my understanding is that a Gen VI cam and timing set can use a plate to hold the cam from walking forward. The cam nose has a machined "shoulder" for the plate which bolts in with two factory bolt holes on each side of the cam tunnel.

Saves you having to fool around with buttons, gaps, torrington bearings, worn thrust on the block, etc etc.

You probably already have most of your parts already, but for someone still in the building process you might consider this option.

 

[madlag]

I used comp cams time chain and cover. The cover is aluminum two piece design thats very nice. i also have the solid roller with aluminum button. no problems at all.

 

[kirkwoodken]

Some of the water pumps, like the SB Eddy's, have a place for a screw to butt against the stock timing cover, to act as an adjustment for cam buttons. Nice thought.