318 Heads: bad valve job?

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Lets try again:

Considering installed spring height, is 0.020" bellow or above a considerable variantion?

Whats the right height for valve stem tips, on a stock valvetrain (rockers, pushrods...)?

I tried to get in touch with the shop today, "the boss" is out for the rest of the week.
 
I would say your problem is as said in earlier post they used exhaust valves that originally had rotators on them we had this same problem with our j heads we had built just had to get valves and keeps for non rotator exhaust valves problem solved
 
Alex,

The Valve Stem Height, though off somewhat is not going to make
that much of a difference on a Street Performance Engine with that
K-6901 Camshaft {.441" Lift ~ 276*/288* Duration}.

The Valve Springs though, should be re-set to the recommended Height of
1.65", to provide for an equal 'Spring Load-Rate' of #90 lbs. at installed height.

The Exhaust Valves look like they sit 'nice' in the Valve Seat.

You 'cannot' sink the Intake Valves, just to achieve a closer Stem Height with
the Exhaust Valve stem.........

Remember, once the engine heats up, the Exhaust Valve Head will expand on
the Valve Seat, and shorten the Stem Height.
 
Hey Paul!

Thanks once again!

So, if I can't sink intake valves...spring seats should be ground on the springs that seat "below" recomended installed height, is that it?
Thats the right way to do it?

I'm already looking forward to doing that job down here..."not".


But first, I found out the 53 Bel Air guy still has his set of 5877 springs (identicall to mine) that he ran for...200 miles I guess, AND that he has a spring load "measurer" tool.
I will go over and measure spring load at my current heights, and see what I get.

Thanks a LOT for that schematics!
Didn't know lifters could handle all that preload!
Hope it all stays within specs when reassembling.
 
Alex,

Valve Spring Height,

{+ or -} .020".......isn't going make that much of a difference anyway, not with
that Camshaft and those 'Valve Springs'.

You're going to 'deep' for a Street Performance Engine.

The 'tolerances' are not that critical.
 
Alex,

Don't panic..............Stock Mopar

Intake Valves range from.... .4.962" to .4.987" {.0250" variance}
Exhaust Valves range from.. 4.969" top 5.005"" {.0315" variance}

Rocker Arm deflection for 'Stamped Steel Rockers' {.004" to .006"}

Those tolerances...........Typical for Small Block Mopar

Valve Spring Pressure..............Typically #10 lbs. to #12 lbs. variation
 
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