Challenge
A major engine manufacturer was experiencing excessive warranty charges from customers who were complaining about their vehicles emitting black smoke. This smoke is typically symptomatic of an engine that is burning a disproportionate amount of oil. Upon closer examination, it was determined that the problem was caused by missing piston rings in the engine. Repairing this defect once the engine is installed in the vehicle is time consuming and costly. The manufacturer's existing end-of-line testing could not detect the missing piston rings or the resulting compression defects.
Solution
The engine manufacturer required a test system that was more effective at identifying timing and compression related defects. The manufacturer decided to implement Sciemetric's Long Block Verification System at key points in their assembly process. This in-process testing enables them to catch the defects that were having the biggest impact on their bottom line and yield. One primary area of focus was to improve detection of compression and piston defects.
The Long Block Verification System is designed to provide consistent and reliable detection of defects such as: low compression, mis-assembled timing chains, head installation problems, incorrect engine timing, valve seating problems, missing piston rings and soft lash adjusters.
Download our complete application note to learn how Sciemetric's solution for engine long block testing helped this customer.
