Oil Filters

Following a scheduled oil and filter change, the technician noted lower-than-normal oil pressure at idle. The new filter (p/n CH48110-1) was replaced and oil pressure indication was normal. Examination of the replaced filter noted some paint chips had been removed in the flange area. The submitter suspects that a paint chip could have contaminated the filter, causing it to go into bypass. These filters are packaged in cardboard boxes. There was no damage noted to the box containing the filter.

Editorial Staff

Tuesday, October 30, 2018 at 12:00 AM ET

Verified

Key Takeaways:

Several incidents report **newly installed oil filters failing** immediately after an oil change, causing low oil pressure or oil leaks due to suspected manufacturing defects (e.g., damaged bypass valves, faulty threads/mounting studs) or internal contamination.
One incident detailed an **oil leak caused by external mechanical damage** to a filter, where a loosened vacuum pump cooling shroud abraded and cracked it.
The collected reports highlight a **diverse range of oil filter issues**, including internal manufacturing defects, external mechanical damage, and faulty threads, often manifesting immediately after installation.