custm2500

iTrader: (11)

I know there a many threads but since it is so important I am hoping to directly answer my questions.

I was hoping to use clay but seems like using the hydraulic lifter will throw the numbers off significantly. Is there a way to overcome the hydraulic lifter, such as a max value that it will compress? I have been busy and somewhat avoiding checking this for the reason of making sure it is all correct. I am finally trying to tackle it and need some advice. Thanks.

I get this overcame and she should be running in a week or less!

black00ssFL

iTrader: (24)

Solid lifter or checker spring. I made a solid lifter by welding one of my old lifters. Too many variances between lifters and if they actually compress all the way when turning by hand to trust that measurement.

custm2500

iTrader: (11)

Damnit!!!!

Where would I get a single solid lifter?

A checker spring is any spring the is fairly light but long enough to hold the valve shut.

vettenuts

iTrader: (4)

Are the heads on or off? Why not use the dial indicator method and if you don't have that in a pinch you can use feeler gauges.

COPO9560

Tack welding an old hydraulic is a very good idea. I have found tootsie rolls work better than modeling clay - the wax paper they come in does not stick to the piston. Peel off and measure.

bww3588

iTrader: (49)

how do you use feeler gauges to check PTV?

bww3588

iTrader: (49)

if you take an old lifter apart, pull the plunger out and stack it full of washers, and reassemble, it will become "solid"

vettenuts

iTrader: (4)

You would follow the dial indicator method but use a feeler gauge to measure the movement of the valve from zero lash. In other words, you would start before TDC of the exhaust stroke with check springs at about 20 degrees before the piston reaches the top. Move the crank in 2 degree increments and then use feeler gauges to measure between the rocker tip and the valve stem when you push the valve down so it is in contact with the piston. If the gap is huge, then move to the next step. Doing this carefully (not lifting hard on the rocker tip) should prevent pushing the lifter plunger down and getting a false reading.