PTV measurement question.
I have my dial indicator setup, checker springs and zero lash with an adjustable push rod.
I've taken a few measurements and understand the process now. Which leaves me to ask is the measured distance with the dial indicator the actual clearance or do I have to subtract that from another number?
I understand that with the dial indicator the readings are off about .010. And the more accurate reading is with the clay method. Which ill be attempting next.
I've taken a few measurements and understand the process now. Which leaves me to ask is the measured distance with the dial indicator the actual clearance or do I have to subtract that from another number?
I understand that with the dial indicator the readings are off about .010. And the more accurate reading is with the clay method. Which ill be attempting next.
The dial indicator is more accurate than the clay method for measuring P-V. You'll need to have degree wheel set up and find TDC for No.1 and you'll be looking for the closest reading on the intake and exhaust valves. Typically your closest P-V on the intake occurs 10°-15° after TDC of the intake stroke and roughly 10° before TDC on the exhaust stroke.
The dial indicator is more accurate than the clay method for measuring P-V. You'll need to have degree wheel set up and find TDC for No.1 and you'll be looking for the closest reading on the intake and exhaust valves. Typically your closest P-V on the intake occurs 10°-15° after TDC of the intake stroke and roughly 10° before TDC on the exhaust stroke.





