How To Lap Valves, Spring Height Micrometer, and Reface Valve Stems [EXPLAINED]

Having the right tool for the right job will always save you time. A Spring Height Micrometer comes in very handy when you do a valve job or change a cam and springs. We used our Makita drill to lap the valves on these LS heads and then installed new springs. After lapping the valves in we made sure to reface the valve stems as well where the rockers make contact. The Spring Height Micrometer made it easy and fast to accurately check the max spring height on each of the valves. All of our measurements were within 0.020 (twenty thousandths), so we didn't need to shim any valve springs.

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[garyoborny]

👍 you did a good job of explaining the method and reasoning!

[curtisgore]

I've rebuild a lot of engines but have never done my on valve job! It's getting hard to find people you trust to do a good job

[dieselapegarage]

Appreciate the tips and tricks now it's time to go out here and see what I can do 😂😂😂 thanks 🙏

[zdravkomomci]

Fantastic method on the valve stem never thought of that I have a bench drill will drill 90deg perfect and I have thick glass that I used to reface my head as well as now valve stem face after watching thanks heaps

[Supanova]

if i have triples can i take spring out to make double? this was a circle track motor now i am putting a comp 490/490 lift cam iron eagle heads sbc 355 which does not require that big of a spring. This is a budget motor. thanks

[cdownin]

LMAO Im doing a valve job with new valves and im not coming anywhere close to this valve grinding compound. Im using baking soda tooth paste. Its nice and gritty but does ruin the finish of a new valve and valve seat. But the funny thing about the video is that you can tell he doesn't know what he is doing is because he used the RED scotch bright pad... to clean the head gasket material off the head. You can see how uneven he grinded the head sealing surface. LMAO head is not going to seal looking like that or the motor is going to consume coolant or the coolant reservoir is going to have really high pressure pop off coolant lines but not over heat... This guy is going to be in my facebook group with all these funny symptoms LMAO

[MC-detf]

Hit us with God's word of truth and the truth shall set us free, Amen. Repent and be baptized every one of you in the name of Jesus Christ for the remission of your sins. And I say repent and the word said repent- stop sinning and turn back to God and Bible.

[crownvictorialifestyle]

If anybody buys into what this guy just did with the valve lapping you crazy
This head needs a valve job and the valve itself needs to be ground to a 45 degree angle
Valve lapping a method used after a valve job lapping valves itself does nothing it tells the person who did the valve job where the sealing surface is at

[johnwoodrow]

FFS, spend your money buying something as useless as a 'spring height micrometer' and scrimp on properly facing the vales and seats. Just another of the couple hundred DIY valve job videos that are promoting nonsense.
Measure the free spring length against specification to see if the springs are still good. You don't need to measure the simulated installed height becomes a valve that has been excessively faced or seats have been cut to deep and the inserts need replacing are visually obvious to anyone who knows what they are doing.