Uploaded June 2026 | Updated September 2026, 3 weeks ago
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What would you do if a motorcycle suddenly lost oil pressure immediately after an oil change?
That's exactly what happened on this 1979 Triumph Bonneville T140E.
After servicing the bike, the oil pressure warning light stayed on while the engine was running. In this video, I walk through my diagnostic process as we investigate the oil system, inspect the oil pump, check the pressure relief valve, examine the filter, and work through the possible causes.
Let's crack this engine open and see what some possibilities are as to what might have caused this.
In this video:
• Oil pressure warning light diagnosis
• Triumph oil system checks
• Oil pump testing
• Pressure relief valve inspection
• Troubleshooting low oil pressure
Once our parts get in, I will post an update video!
►► If you want help working through problems like this on your own bike, that’s exactly what we do inside the Inner Circle during live Q&A sessions.
themotorcyclemd.com/mcmd-inner-circle-member
►► Model Specific Carburetor Teardown and Cleaning Tutorials
themotorcyclemd.com/premium-courses
►► If you need guidance on fixing, repairing or diagnosing a problem with your bike.
themotorcyclemd.com/consult-submission
#TriumphBonneville #TriumphT140 #MotorcycleRepair
Channel memberships are a simple way to support the channel and keep this content coming. I appreciate you.
youtube.com/channel/UCmpL0CxrbzbsD6G0GE0P_DQ/join
What would you do if a motorcycle suddenly lost oil pressure immediately after an oil change?
That's exactly what happened on this 1979 Triumph Bonneville T140E.
After servicing the bike, the oil pressure warning light stayed on while the engine was running. In this video, I walk through my diagnostic process as we investigate the oil system, inspect the oil pump, check the pressure relief valve, examine the filter, and work through the possible causes.
Let's crack this engine open and see what some possibilities are as to what might have caused this.
In this video:
• Oil pressure warning light diagnosis
• Triumph oil system checks
• Oil pump testing
• Pressure relief valve inspection
• Troubleshooting low oil pressure
Once our parts get in, I will post an update video!
►► If you want help working through problems like this on your own bike, that’s exactly what we do inside the Inner Circle during live Q&A sessions.
themotorcyclemd.com/mcmd-inner-circle-member
►► Model Specific Carburetor Teardown and Cleaning Tutorials
themotorcyclemd.com/premium-courses
►► If you need guidance on fixing, repairing or diagnosing a problem with your bike.
themotorcyclemd.com/consult-submission
#TriumphBonneville #TriumphT140 #MotorcycleRepair
