Weichai America Corp.
Revision: August 2019 11
New Engine Break-in Procedures
The way any heavy-duty industrial natural gas engine is operated during the first 4 hours of
service, will have a major impact on how well that engine will perform, how much oil it will
consume and how long it will last. The engines moving parts are closely fitted for long service,
and even though all Weichai America WP04 Gas Engines are run before they leave the factory,
an additional period may be required before uniform oil films are established between all mating
parts. The main purpose of break-in is to seat the compression rings to the cylinder walls.
It is recommended that during the first 4 hours of service:
1. Operate at one-half to three quarters load. Do not operate at maximum rated load for
more than five (5) minutes at a time.
2. Do not run the engine unloaded for long periods as this will cause cylinder walls to
“Glaze” before the piston rings seat properly and result in excessive lubricating oil
consumption.
Engine Loading
The gas engines are designed to operate continuously at industry accepted high ratings and to
provide optimum service life. It is not recommended to operate a natural gas engine continuously
at low load levels. A general rule used for most low emission natural gas engines is to operate at
60% load or above.
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GET YOUR WEICHAI & AFTERMARKET SERVICE PARTS AT FLYPARTSGUY.COM
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