Certified Refurbished & Used Program
A Certified Refurbished engine is not unlike a Certified Pre-owned car. There are a base set of standards and criteria the engine must meet to pass a Certified Refurbished inspection. The engines are tested on a SIM test stand (simulates running) meaning the engines are rotated at normal operating RPM so the following can be checked:
Compression– Compression testing indicates if the cylinder bore area seals up which is very important for the performance of the engine. Too low compression or uneven compression between cylinders would indicate there is excessive wear on the rings or valves and these could cause high oil usage, check engine light to illuminate or even early engine failure.
Oil pressure and oil flow– Oil pressure is key to proper engine lubrication. High oil flow will give you low oil pressure which may be an indication of severe wear on the bearings. Also, incorrect oil pressure may set a code and illuminate a check engine light if it isn’t correct.
Torque to Turn– Torque to Turn measures the amount of resistance for the engine to operate. If the engine is too tight and hard to turn, this may indicate the engine had been improperly maintained.
VVT/VCT-Variable Valve Timing and Variable Cam Timing are common on today’s engines and are critical for the engine components to work on-time to optimize performance. When operating properly, these units help control fuel mileage as they reduce compression on the cylinders as the engine gets up to operating capacity.