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How to Reseat / Lap Valves (Basic Valve Job)

In this video i'm explaining how to reseat or lap valves in a flathead or overhead valve engine. Also can be called a valve job, but this is not a complete valve job. I also used to much valve grinding compound, it does not require a whole lot. Usually when a engine needs this done is when a engine has low compression that is found to be leaking around the valves, or sometimes a engine will backfire do to the valves not closing completely/properly. Thanks for watching.


 


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EASY, HOW I LAPP & GRIND VALVES. THEY DONT TEACH THIS TRICK IN SCHOOL, ONLY OLDSKOOL.
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Cylinder Head 201 - Radius Cut Valve Job
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Cylinder Head 105 - Valve Job Basics
Valves not sealing? Valves not bent? This is how you fix that problem. In this video I outline the basic valve job procedure. Cleaning the valves, cleaning the seats, cleaning the combustion chamber and lapping the valves in to make a better seal. Here I cover the process start-to-finish. It's the same exact process for pretty much all non-rotary combustion engines. It takes patience and perseverance to do this job, but anyone can do it. Reference your service manual for measurements and service limits. Everything else that's not in your service manual is in this video. I apologize for not having broken busted crap to work with in this video. It's more beneficial to all of you when bad fortune falls on me because it gets well documented, and many people watching these videos are looking for answers. If you have bent valves, you will discover it quickly once you chuck one up in the drill. You'll see the face of the valve wobble around while it spins. You'll see evidence of this damage on the valve seat. If it's bad, you may see damage on the valve guides in the form of cracks or missing pieces where the valve guides protrude through the head ports. Give all that stuff a good visual inspection. ...and if you doubt yourself, never hesitate to get a second opinion or consult a machine shop. They will have access to expensive tools that you wont find in your average gearhead's garage.





BDA Cylinder Head Repair after valve and seat damage
BDA Cylinder Head Repair by Vulcan Engineering after valve & Seat damage. www.vulcanengines.com





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When my 1995 eclipse timing belt broke I knew that there was a 99% chance that the valves were bent in the process. I searched the internet for a good way to replace them, without having much luck. I figured I would try and come up with something myself, I figured I would document the whole process of valve lapping by video...hope this helps you if you are in the same bind as I was!!!





How to polish a crank ( crankshaft )
Engine-Guru.com Presents a video on how to polish your crank shaft. Any questions call 616-430-3114 ask for KYLE. We are located out of Grand Rapids, Michigan.





How To Grind/Seat Valves and Replace Seals
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cylinder honing class
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Teardown and Inspection of Briggs and Stratton 12.5 HP I/C Flathead Engine
BRIEF INSPECTION of a Briggs 12.5. This engine overheated. Needs alot of work, gonna be put off for a while, needs bored out and resleeved and new valve guide bushings pressed in. Thanks for watching.





Comp Cams - How it's Made
Competition Cams, one of the industry leaders in performance engine equipment, walks PowerTV through the complex process of designing, creating and manufacturing its high performance cam shafts.





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