Combustion Chamber Molds When making chamber molds for a variety of purposes, including holding up the valves on the assembly bench, (as opposed to a beanbag or shop rag) common auto body filler (Bondo) works very well. It’s fast and very inexpensive. Just mix the body filler and fill chambers...
Serve Up Cylinder Support on a Torque Plate Honing motorcycle or powersport cylinders can be difficult. The thin bottom portion of the cylinder often protrudes 1”-3” below the cylinder assembly, and if this thin/bottom portion of the cylinder is not supported during the honing process, the hone tends to push...
Surface finish roughness instruments use a roughness specimen, or "patch," that is certified for a known wave form to provide a specific surface parameter result. With this certified specimen in hand, it is easy to verify that the surface finish measuring instrument is reading properly. Because of the nature of...
How to See Through Pistons for Clearance With the advent of longer stroke crankshafts, one inch plus lift camshafts, raised camshaft locations, lifter angles, bore spacing, etc., exact camshaft lobe and connecting rod clearance may not be able to be determined from looking up from the crankcase area of the...
Removing Stubborn Dowel Pins Do you ever have solid dowel pins that are worn or tapered, and the slap hammer slips off no matter how tight you make it? Add a dab of valve lapping compound to the dowel pin. It works wonders. Most of the time the pin slaps...
Using Multi-Layer Steel (MLS) Head Gaskets As the name implies, MLS gaskets are constructed from 2 to 5 layers (depending upon the application) of heat treated stainless steel. Each layer is separated by a thin layer of a nitrile rubber coating. They have also been embossed in key areas to aid...
Making Your Own Piston Ring Compressor Some customers have been asking me for piston ring compressors in sizes we do not carry. My suggestion to them is to do what I do. Look in a cylinder sleeve catalog and find one that is close to the ID of the job...
Safe Valve Spring Break-In Most engine builders are well aware of the fact that high performance valve springs should be compressed to coil bind through several cycles before being installed. The problem with this procedure is that it can be time consuming, costly and even dangerous. It is time consuming...
5 Tips For a Manual Milling Machine Editor’s Note: A manual milling machine is typically at the heart of every machine shop. In the following, Jim Kovach gives some useful tips on how to get the most from your mill. 1. Always use a high-quality machinist’s square on the mill....
Detonation vs. Pre-Ignition (Editors Note: the following is in response to Greg Goss’s entry in the August 2012 issue) A sharp point or edge that can glow in a combustion chamber or on a piston top does not cause detonation. Mr. Goss inadvertently was referring to pre-ignition. Detonation and pre-ignition are...
We’ve narrowed the field to the top 20 Shop Solutions, and now we need your help selecting the Top 5. All you need to do is read the submissions listed below, pick you favorite and click through to vote, it’s that simple! The best part? By voting, you get a...
Cold Air Guns use a small amount of filtered compressed air and vortex tube technology to produce sub-freezing air for numerous cooling applications. Without any moving parts to wear out, the internal vortex tube converts shop compressed air into a cold air stream, producing temperatures down to as low as...
First, place the correct size wrist pin boss of the piston to use as a tool from each side. Then place the ring to be squared in the cylinder. Be sure not to push the ring down too low. Now, with the piston upside down, push the ring with the...
