CNC. What it means. Why it’s your friend.

We utilize the latest manufacturing technology in all of our engine and component part machining operations. The abbreviation CNC stands for computer numerical control, and refers specifically to a computer controller that reads instructions and automatically operates machining equipment. This selective removal of metal is checked and rechecked throughout the machining operation for accuracy.

Gehring CNC Cylinder Hone – The Gehring hone has the ability to hone two cylinders at the same time while holding bore diameter and roundness within 5 microns. The air gages integrated through the tool head constantly check for size while producing an accurate cross-hatch throughout the cylinder bore. The Gehring hone is capable of meeting the smooth peak hone surface specification consistent with OEM manufacturing plants. What does this mean to you? Reduced engine wear, exhaust emissions and oil consumption!

Junker® Jucrank 5000 CNC Crankshaft Grinder – The Junker® grinder is a fully automated machine that can grind an entire crankshaft in one chucking. The Junker® can also down- load inspection data from the Adcole laser measurement machine and produce a crankshaft with roundness and diameters within 3 microns. Each crankshaft machined on the Junker® is also checked for straightness, runout, stroke, and parallelism. This machine thrives on discriminating tolerances while maintaining consistency and reliability.

Did you know the human hair is approximately 100 microns in diameter?
ASG measures down to single digits – 1/10 th the diameter of a human hair!


New Engines Are “Dressed For Success.”

ASG has released a new line of dressed engines for popular domestic and import vehicles. The dressed line adds compo- nents such as an oil pan, front cover, and rocker covers to the ASG remanufactured long block. Special fleet applications include the Crown Victoria® Police Interceptor that adds a new water pump, spark plugs and engine oil cooler to the dressed long block. The dressed engine represents a great value for distributors and fleets looking for adding selling features. These additional parts eliminate clean- ing and reusing old parts from the original engine. With a dressed engine, downtime and labor costs are reduced. Ask you ASG representative today if a dressed engine is available for your application!

Popular dressed engines in stock and ready for immediate shipment:

  • 2.3L Ranger
  • 4.0L SOHC Explorer/Ranger
  • 4.2L E/F Series
  • 4.6L Crown-Vic Police Interceptor
  • 5.4L E/F Series and Expedition
  • 7.5L E/F Series

General Motors applications:

  • 5.7L 86-95 C/K Series EFI
  • 5.7L 96-02 C/K Series Vortec
  • 366/454 C/K Truck
  • 4.8/5.3/6.0L Gen III Truck


  • 2.4L Toyota Celica and Four Runner
  • 3.0L Toyota Four Runner

Even the way we ship our engines shows our commitment to quality and excellence… less mess and less chance for engine contamination!

ASG TECHNICAL CORNER: Spotlight On Engine Detonation

What is detonation and how does it affect your engine?
Detonation is the combustion of the remaining fuel/air mixture in the cylinder chamber. Detonation occurs when fuel is subjected to additional heat or cylinder pressure. The cylinder pressure rises beyond its designed limits and, if allowed to persist, detonation will damage the pistons. Even the best engine parts cannot withstand severe detonation for more than a few seconds at a time. If there is enough heat and pressure in the combustion chamber, detonation can begin to occur before the spark plug even fires, which would normally initiate the combustion. This other form of detonation known as pre- ignition detonation happens when the piston is traveling up towards a wave of compressed, exploding gas. These are the worst kinds of detonation conditions, which may bend connecting rods and destroy pistons.

What causes detonation and how can you avoid it?
Extremely high engine operating temperatures can cause detonation.
Engines that are operated under extreme load for extended durations can lead to detonation. To prevent this, verify the cooling system is operating efficiently and check for low engine coolant or a defective electric fan or fan clutch.

Lean fuel/air mixture can cause detonation.
Dirty or clogged fuel injectors can cause a lean fuel mixture. A restricted fuel filter or defective fuel pump can restrict fuel flow to the engine. The carburetor or fuel injection system should be checked for proper operation.

Advanced ignition timing can cause detonation.
If the ignition timing is advanced too far, the cylinder pressure will rise rapidly. Retarding the timing a couple of degrees will usually eliminate spark knock. Verify the distributor is timed correctly.

Knock sensors can cause detonation.
Many late-model vehicles have knock sensors that can detect engine knock and automatically retard the ignition timing to prevent it, allowing engines to operate in a safe tune and avoid detonation. Make sure the knock sensor is functioning correctly to safe guard against detonation.

Fuel grade can cause detonation.
Using lower octane fuel than the manufacture recommends may lead to detonation. Most factory high performance vehicles require higher octane fuel due to higher engine compression ratios. Check the owners manual for recommended octane requirements for your engine.