Pushrod length is checked and adjusted for minimum pattern width in the mark on stem, not just for center. The wear pattern should be in the center, but the length is actually adjusted to have the narrowest pattern mark.
Having a lot of vertical clearance does not necessarily mean it is safe If the radial clearance is not there the edge of the valve can contact the piston. A clay impression and the dial indicator is the best way. Also, pushrod length will effect max lift. You have to take the lobe to max lift with the pushrod you have installed to know for sure what lift the valve is actually seeing, not just stop at the lift the cam is supposed to be.
i have a question hopefully you can help. I bought a car with a rebuilt 350 in it, i pulled it out swapped the cam, oil pump, and put on some rebuilt vortec heads. i didn't deck the block nor did i mill the heads. Now I have one head that takes the 7.850 pushrod and the other head show the rocker is hitting the valve stem very close to the exhaust side basically telling me this is too long. my question to you is, should i put on a thicker gasket or should i pull the good head mill it down the same size as the other and run a smaller pushrod? any help is greatly apprecicated. Thanks in advance.
![ปฏิเสธไม่ไหว (Crush on you) - LIPTA feat. No One Else [Official MV]](http://i.ytimg.com/vi/NBw1jF342vw/mqdefault.jpg)
nice to see guys building up AMC engines almost a lost art now
very nice video, nice to see a pro at work
Pushrod length is checked and adjusted for minimum pattern width in the mark on stem, not just for center. The wear pattern should be in the center, but the length is actually adjusted to have the narrowest pattern mark.
That sure beats the playdough on the piston to check valve clearance!
Having a lot of vertical clearance does not necessarily mean it is safe
If the radial clearance is not there the edge of the valve can contact the piston. A clay impression and the dial indicator is the best way.
Also, pushrod length will effect max lift. You have to take the lobe to max lift with the pushrod you have installed to know for sure what lift the valve is actually seeing, not just stop at the lift the cam is supposed to be.
i have a question hopefully you can help. I bought a car with a rebuilt 350 in it, i pulled it out swapped the cam, oil pump, and put on some rebuilt vortec heads. i didn't deck the block nor did i mill the heads. Now I have one head that takes the 7.850 pushrod and the other head show the rocker is hitting the valve stem very close to the exhaust side basically telling me this is too long. my question to you is, should i put on a thicker gasket or should i pull the good head mill it down the same size as the other and run a smaller pushrod? any help is greatly apprecicated. Thanks in advance.