Valve Size

[Hodrod7]

Is it possible to use a boriscope to check valve size when heads are on the engine? (King tech guy says he can)

[dereksehi]

I won't say it's completely impossible but I certainly wouldn't DQ someone over what you thought you could see especially without physically measuring them.

[Hodrod7]

I agree 100%

[JustAddDirt]

most bioscopes have the option to attach a mirror to the end of the unit to see back in the opposite direction.
possible yes, would I trust a tech man looking threw one to DQ me over valve size. NO

[RCJ]

They would probably be looking at the gap between the intake and exhaust valves.Back in the day that is how we could tell if a head was 2.02/1.6 or 1.94/1.5.

[stock car driver]

Most tech man can probably tell as you drive by in the pits if you have 1.94 or 2.02 valves... haha

If a guy wants to hamper his performance with a oem head by running 2.02 valves they should let him.