Thread: Opinions wanted.

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Originally Posted by JBoss

A local racer says change out the 5 studs first before buying differant push rods? Is there anything to this theory?

He may be thinking, and rightly so, that the heads have been tossed around, bending some of the studs. Lay a good straightedge on the side of the studs from end to end near the top of the studs. You'll be able to see pretty quickly if any are bent.

Originally Posted by techinspector1

Lay a good straightedge on the side of the studs from end to end near the top of the studs. You'll be able to see pretty quickly if any are bent.

I dont have a "straightedge" per say. Will the edge of a 6ft level should work? I would think it would.

Originally Posted by JBoss

I dont have a "straightedge" per say. Will the edge of a 6ft level should work? I would think it would.

Yeah, that'll work. Lay the level first on one side and then the other side of the studs and look closely between the studs and the level with a good strong light.

Pat is also saying that some of the valves could be at a taller or shorter installed height due to the depth of the valve seats. If you cut one valve seat down farther into the head than another valve seat, the valve on the deep seat will have the valve stem sitting up higher on the spring side of the head and that valve could have a different pattern shown on the valve tip because the geometry is a little different.

With all the springs in place and the valves seated, lay the level across the top of the valves to see if one or more stick up above the adjacent valve stems. That will tell you that the seats are uneven or the valves are of unequal length. If the valve stems have been cut to equalize the length, the shop may have ground down past the initial hardening that is on the valve stem. This will result in the rocker pushing off to the side of the valve stem after it rounds off the stem tip.

Update 10/29/10:

Checked Studs as suggested and found one that was bent down .006 using a feeler gauge under the level. REPLACED it on the spot.
Checked valves tips. Also with level. I could not get a .002 feeler gauge under the low ones. By what I have learned so far this is very good and nothing more needs to be done.

I installed the rockers arms and adjusted lash.(zero lash + 1/2 turn)
Rechecked #1 and the #8(bent stud) Everything looks good.

Thanks very much for the help and the info.