Valve Adjustment

[Plumber452]

Hey Guys,

I have a mildly built 440 that needs the valves adjusted. What's your thoughts? Here's the spec's:
Keith Black Hyp pistons
906 Heads
214-181 stainless valves
Comp 470 Lift Cam 1.6 Roller Rockers

This is my first Mopar and first modified engine. Any guidance will be appreciated.

Thanks

 

[Bird 426]

Solid or hydraulic

 

[gkent]

There should be some instructions and specs with the cam. You need "preload" for a hydraulic cam and "lash" for a solid. Also, the lash would likely be for a 1.5 ratio rocker so it has to be increased a hair for your 1.6's. "Preload" would not change regardless of rocker ratio.

 

[rickseeman]

This chart will help you adjust the valves.

 

[Plumber452]

Thanks to everyone!!!! As to solid or hydraulic, I don't know. I had reached out to the guy I bought the engine from prior to me posting this request for help. He got back to me after making this post and here is what he wrote in the text "Probably ck adj lifters should have 050-060 preload about 1/2 turn on adjusting screw" I appreciate him responding but I'm still not quite sure how to interrupt it. By him saying preload and based on what gkent wrote about hydraulic and solid I assume it has hydraulic lifters. Which I guess he's saying there should be .050" to .060" clearance between the rocker and the valve. Thoughts??? I could call him I guess but if I'm going to sound stupid I'd rather it be in this forum. LOL!!!

 

[gkent]

NO, "preload" means there is no gap at the rocker and the lifter plunger is compressed a given amount.

So in your case with hydraulic lifters the process will be as follows:
1) Find TDC on the firing stroke of #1 cyclinder - use that as your starting point to adjust the valves per the table attached below
2) back off the adjuster screw on the valve you're adjusting to the point the pushrod has play.
3) slowly tighten the adjusting screw while spinnig the pushrod with thumb and forefinger of your other hand. When the pushrod binds you are at ZERO preload and zero lash.
4) Tighten the adjusting screw and additional 1/2 turn to yield the preload and tighten the nut.
Done. Now do the same for the remaining 15 valves.

 

[Plumber452]

NO, "preload" means there is no gap at the rocker and the lifter plunger is compressed a given amount.

So in your case with hydraulic lifters the process will be as follows:
1) Find TDC on the firing stroke of #1 cyclinder - use that as your starting point to adjust the valves per the table attached below
2) back off the adjuster screw on the valve you're adjusting to the point the pushrod has play.
3) slowly tighten the adjusting screw while spinnig the pushrod with thumb and forefinger of your other hand. When the pushrod binds you are at ZERO preload and zero lash.
4) Tighten the adjusting screw and additional 1/2 turn to yield the preload and tighten the nut.
Done. Now do the same for the remaining 15 valves.

View attachment 1748095

Awesome!!! Thanks!!!