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PILOT RUNOUT FIX
Jun 24, 2026 | CYLINDER HEADS
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...
FLAT TAPPET TRICKS
Jun 17, 2026 | CAMSHAFTS & VALVE TRAIN
We all know the challenges of flat tappet cams these days, with what seems to be regular failures. When I break them in, I like to preheat the oil some to get better flow right off the start. Also, adding an extra quart of oil perpetuates extra “splash lube” as well....
BRONZE GUIDE REMOVAL
Jun 10, 2026 | CYLINDER HEADS
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...
TIGHT RING LANDS
Jun 3, 2026 | PISTONS & RINGS
Tight ring lands in used pistons due to carbon, rust, or even slightly pinched can be a real problem to overcome. Keeping old rings and using them as scrapers has always been in my playbook, however, applying fine lapping compound liberally and working the ring back...
SAVE YOUR FINGERS
May 29, 2026 | DISASSEMBLY & CLEANING
I use my valve seal puller to hold head bolts and similar items when cleaning them on the wire wheel. I've gotten a good burn too many times, before doing this. Randy Torvinen Torvinen Machine Menahga, MN
DAMPER FIT
May 26, 2026 | ASSEMBLY
Damper fit is something a lot of people don't check and might not know how important it is. If the fit is too loose, the damper can't do its job properly and it can walk on the crank snout causing galling. If it's too tight it'll gall both surfaces resulting in damage...

