How to measure a valve?

Fantom_X7 · Jan 17, 2011

Okay long story short, i bought new timing set, advance cam 4 degrees turn motor over(by hand) and hear a snap(dumb i know) :nono:. Notice 1 valve spring higher than the rest, pulled head portion of valve was laying on piston while other half was still inside the head. How do I measure the valve to replace it.

det_riot · Jan 17, 2011

I'm not positive how they measure it but when you do figure out how they are measured, I would measure a non broken valve, a snappd valve may have deformed slightly before breaking therefore not giving you the exactly measurement you need.

rz5.0 · Jan 17, 2011

take it to a machine shop

Fantom_X7 · Jan 17, 2011

Yeah I pretty much decided that during the day, pulled both heads off and taking it to the machine shop during my lunch break at work tomorrow. Thanks for the tips. I have one question though. Since this is obviously a PTV clearance issue how should I best address this issue as of right now in your opinions? Should i
A) Notch the pistons for better clearance
B) Get a set of SHORTER valves
C) A+B

I dont have the funds AT THIS MOMENT, nor is it my intentions to have the block removed and put in forged pistons, new bearings, clutch, etc....

rz5.0 · Jan 19, 2011

notch its easy

modo · Jan 19, 2011

better question. why did you advance the cam 4 degrees.

Fantom_X7 · Jan 24, 2011

modo said:
better question. why did you advance the cam 4 degrees.

Because I put it in straight up. Cam does not have advance ground into it so imagine a TFS2 that has been retarted 4 degrees. Very poor low end and sudden power around 3.3K, not what I'm looking for.