Save Money And Lap Your Own Valves! [Measured Results]

*Please note that some heads WILL need a valve job (where the valves and/or seats have a new face machined at the correct angles). But it's not always needed. On top of saving money, you'll also avoid cutting material from the valves and seats (there's only so much to cut). Some valves also have a hardened surface which can be compromised by cutting.
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Data dump from all recent cylinder head videos:
https://thecarpassionchannel.com/head...
How to build your own valve testing tool as shown in the video
   • Do You ACTUALLY Need A Valve Job? DIY...  
Jafromobile's Lapping Video (Highly recommend if you're doing this job):
   • Not Another Valve Job!  
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Valve Grinding Compound https://amzn.to/2X0oosL
Suction Cup Drumsticks https://amzn.to/2X0Dlek
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0:00 Intro
1:19 What Is Lapping?
2:07 How I'm Measuring The Sealing
3:39 How To Lap Valves
4:28 HPA
5:22 Basic Concept of Lapping
7:32 Pro Tip
10:53 Exhaust Valve Results
12:10 New Intake Valves
15:00 Intake Valve Results
16:34 Closing Thoughts