Those metal-jacket-only valve seals are very hard to remove. I have a very small scribe-type tool that I ground to an angle to split the seal for easier removal. It took about 10 minutes or less to remove 16. Randy Torvinen Torvinen Machine Menahga, MN
I needed a spring seat cutter pilot that wouldn't hurt the guides on a special set of heads. I tried 3 different pilots that came with the cutters I have and couldn't get better than .005 runout. I used a Chevy oil pump shaft as that's excellent material to make...
When removing guides from an air-cooled cylinder head, where you are pressing from the spring side into the port, I cut the guide away flush to the spring pad. I press the guide from here. This way the protruding guide material does not expand and damage the cylinder...
When chamfering valve springs, it's imperative that you don't hit the insides of any coils, which could lead to a stress riser and breakage. I insert a trimmed rubber pad to lift the tail away from the next coil and give me some room to work with the chamfering cone....
Having preset ball-head and profile cutters for jobs you repeat often, with specific seat profiles to match the valve job you want for a given head, can save time and money. Especially if you are adjusting a seat location different from the factory spec, over and...
Some Honda V-TEC engines have piston-loaded rocker arms that shoot out during disassembly. To avoid this, we loosen the bar a little, just enough to slide a rubber band under and tie it as shown in the picture. Luis Guzman Technomotors El Paso, TX