FLATNESS AND SURFACE FINISH Cylinder head and block flatness and surface finish are critical to proper head gasket sealing. The following general specifications cover both gasoline and diesel engines. Since bolt spacing, location of oil and water holes, pressures,...

RETHINKING OEM EXHAUST FLANGE GASKETS You want to seal that flange with an OE MLS gasket? Good luck! -- The same conditions now exist in exhaust flange technology as when the first MLS head gaskets were being replaced under repair conditions. OEM MLS exhaust flange...

PTFE REAR MAIN SEAL SERVICE PolyTetaFlouroEthylene sounds impressive, and it is. This is the latest material used for rear main seals and was originally developed for the over-the-road diesel engine market, for maximum life. Care must be taken when installing these...

UPDATING YOUR GASKETS CAN SAVE TIME AND MONEY The old adage, “Time is money” has never been more true than it is today. With the high costs of labor, doing a job quickly and efficiently can be the difference in making money or losing it. Using the right products can’t...

REAR MAIN SEAL SEAL I use RTV on the back side of most rear main seals. This is a great safety measure on rubber seals and a must on early rope rear main seal style blocks when using a neoprene type conversion seal. Splitting the alignment of the seal to block is...

A LITTLE TAPE, A LOT OF TIME Here’s a simple time saver for assembling high performance V8/V6 engines. When intake gasket port alignment is critical I use masking tape to hold the gasket in place on the head. You can then flip the gasket up to apply your sealer,...