Machine Shop Labor Schedule

We put a lot of extra effort into our re-manufactured product, and it shows as an added value to you as our customer. We have many popular cylinder heads in stock and ready to go. Some salient features of our heads include:

  • Heads are precision surfaced (not belt sanded).
  • Manifold surfaces inspected & machined if needed.
  • New bronze valve guides are installed in every head.
  • Every valve guide is diamond honed for the correct valve stem to guide clearance.
  • Clearances double-checked with Sunnen dial bore gauge.
  • Valve faces reconditioned on the state-of-the-art centerless grinding equipment.
  • Valve stems polished on our new K-line stem polisher (including new valves).
  • Valve tips are machined to the correct length to avoid problems with the nonadjustable valve train.
  • Valve seats are precision machined with multi angles and the correct valve seat width on our SERDI 100, the finest equipment in the industry.
  • Hard seats are installed if necessary.
  • Finished valve work vacuum tested prior to assembly.
  • Valve spring installed heights set to OEM specifications.
  • Viton-positive stem seals are used in all applications.

Overhead Cam Cylinder Heads

Complete with the above plus:

  • New cam bearings (if applicable).
  • New or reground Camshaft.
  • New or reconditioned Cam followers.
  • Lifters or rocker arm pivots.
  • The valve's fully adjusted head is ready to install.

Re-Manufactured Engines

We can re-manufacture your engine or use one of our core engines for popular applications tailored to suit your requirements.


Quality Control Engine Test Station

All engines are tested prior to delivery on our SIMTEST QC180. The following aspects are checked during testing:

Oil Pressure

Oil is preheated to 130 degrees, and this temperature is maintained throughout the test to ensure consistent viscosity. The oil is filtered three times, first with filter media in the oil catch tray, second with a 5-micron filter, and third with a 25-micron filter. Oil pressure is recorded and compared to our standards for the engine type. The oil pressure recorded on your inspection envelope is metered for control reasons and will not relate to the operating oil pressure once the engine is installed in the vehicle.

Oil Flow

This two-step process indicates any reason for excessive internal oil leakage. Possible causes could be excessive bearing clearance, leaking or missing plugs, improperly installed cam bearings, etc. We visually inspect for excessive oil bleed-off and compare hot oil flow numbers to our standards for engine type.

Rotational Torque – 30 RPM & 350 RPM

Every engine has internal friction. We record the amount of amperage required to rotate the engine and watch for torque spikes during rotation. We compare the readout to our standards for the engine type.

Valve Adjustment

During the rotational test, the hydraulic lifters are checked to ensure that the lifter plunger is adjusted properly, the lifter is filled with oil, and has been purged of all air. Mechanical valve adjustments are reset with the engine rotating. Lifters are checked for rotation (lifters must rotate, or the cam lobe will go flat). The rocker arm oiling is confirmed.

Compression Test

A cranking compression test is performed, and the results of the test are recorded on your inspection envelope. A variation of more than 10% is cause for rejection.

Torqued Fasteners

All torqued fasteners on your engine are first checked by the assembly person who assembles the engine and second by the quality control tester. On torque to yield type bolts, we do not yield the bolts twice.