chevy 350 rebuild part 3

Removed piston rings, cleaned heads up and the valves. Timing chain cover is cleaned now and got some chevy orange paint... Soon as the parts get in it'll be ready to start assembly of the engine.

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Basic valve job
A demonstration on how to inspect and do a basic valve job.





Magnetic test for cracks on Chevy Heads at Cylinder Head & Block Service Part 3 of 350 rebuild
A magnetic test for cracks on Chevy Heads with an explanation of the 305 head. Filmed at Cylinder Head & Block Service in Brookville Ohio. Part 3 of 350 rebuild





How-To: Polish Cylinder Head Exhaust Ports
In this video I demonstrate how to Polish Exhaust Ports on a Chevy 350 Cylinder Head. Head #462624. Hope this video helps those of looking to port and polish your own cylinder heads! Please Subscribe!





Cylinder Head 105 - Valve Job Basics
Valves not sealing and they're not bent? This is one way to fix that problem. I have filmed a professional machinist complete a proper valve job which includes cutting new seats, installing new valves, and doing some valve grinding tricks at the following video: https://youtu.be/eMNFeToqzJU For as little as $1 per video, per month you get access to early releases, exclusive content, and discussions at: http://www.patreon.com/Jafromobile Once you've completed this work, you can clearly see the size, width, and consistency of the valve mating surface on BOTH the valve, and the seat. Should any distortion appear in the mating surfaces, you will need the help of a machinist to fix this properly. I outline the cleaning and inspection techniques to help determine whether or not you need to pay a machinist to perform an actual valve job. If you find after performing these steps that your valves don't seat properly, or that your valve seat or valve margin measurements are out of spec, only then would you need a machinist's help. Here I cover the inspection process start-to-finish. All of these same procedures would be used by your machinist, usually with better equipment... but you can still do the same thing in your garage. These techniques work exactly the same way for just about every non-rotary combustion engine. It takes patience and perseverance, but anyone can do it. Reference your service manual for your engine's specifications and service limits. Everything else that's not in your service manual is in this video. 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 home garage. Tools that will give better, faster, more accurate answers than someone could determine with their eyeballs when they don't own those expensive tools. Lastly: The oxidation found on these valve seats were caused by 110 octane leaded race fuel. Some kinds of race fuel are corrosive to hardened steel valve seats. This head had only about 30,000 miles on it since its last valve job. These techniques will not fix damaged valves without causing a different kind of damage. I'm sorry I had no damaged parts beyond corrosion to show you in this video.




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