Engine Machine Service

The new Rottler HP7A Cylinder Honing Machine employs the latest technology available for today’s Engine Machine Service . With 90 years of experience, dedicated R&D and precision engineering we have produced the new front-runner in cutting edge diamond hone technology. The bright, user friendly, full color 10″ (254mm) Windows Touch Screen Control makes honing faster, […]

Motor Rebuild Shops

GM Castech Cylinder Heads Motor Rebuild Shops Tech Solutions: I’m sure most of you know by now about GM’s 4.8L and 5.3L Vortec Gen III and Gen IV V8 engines with Castech cylinder head castings. GM has sent shops Technical Service Bulletin (TSB)  for Castech specific cylinder heads that are prone to cracking. GM’s TSB #06-06-01-019B […]

Engine Rebuilding tips Adjusting Hydraulic Lifters

Adjusting Hydraulic Lifters for Proper PRE-Reload on your next engine rebuilding project more Tips for your Engine. Since hydraulic lifters can compensate for thermal expansion of the engine, the adjustments can be made with the engine cold; hot adjustment is not necessary. In order to adjust the reload the lifter must be properly located on the base circle or “Heel” of […]

Most Important Factors for Choosing Valve Springs

The three most common factors that should be considered are installed height, camshaft type, and cylinder head valve spring pocket dimensions. Each consideration is equally critical to choosing the correct valve spring for your application.  To begin, your installed height should always be measured. This is important because the height at which a valve spring […]

Valve Lash can Help Tune the Engine !

The engine only responds to the actual movement of the valves. Since the valve cannot move until all the running clearance (valve lash) has been taken up, the amount of valve lash you use affects the engine’s performance. If you decrease the amount of (hot) valve lash, for example, the valve will open slightly sooner, […]

What does a 5W-30 do that an SAE 30 won’t?

When you see a W on a viscosity rating it means that this oil viscosity has been tested at a Colder temperature. The numbers without the W are all tested at 210° F or 100° C which is considered an approximation of engine operating temperature. In other words, a SAE 30 motor oil is the same viscosity as a 10w-30 or 5W-30 […]

Causes of Melted Piston Top and Ring Land on Diesel Engines

PROBABLE CAUSES  This damage is attributed to the thermal overload of the piston. There are two causes for this. Abnormal combustion can be diagnosed via the following features:  • The bowl edge has been “gnawed off.” • The injection nozzles display a poor spray pattern. • The injection pressure and the delivery rate of the […]

New Lifters With My New Flat Tappet Camshaft!

If you are installing a new flat tappet camshaft in your engine, you must install new lifters. The lifter/lobe contact area is under a tremendous amount of pressure, and the lifter and lobe must wear in together. The following reasons why you must install new lifters: • A new lifter has a slight “crown.” A new cam […]

Piston Ring Installation Tips

File fit rings sets require filing of the top and 2nd rings to achieve the correct end gap. To properly measure the ring gap, the ring should be square in the bore one inch down from the deck. Measure the ring end gap with a feeler gauge or equivalent device. Calculate the recommended ring end […]

Piston Ring Selection In Chrome Plated Cylinders

It is recommended that chrome plated rings not be installed in chrome plated liners under any circumstances. Catastrophic destruction will likely result. Plain cast iron-manganese phosphate coated, or molybdenum rings may be used. It is normally difficult to detect visually in a used cylinder if it is chrome plated or not. If any doubt exists, […]