Oil pump
Dr. Detroit
Joined: Mar 2012
Posts: 10,093
Likes: 4,019
From: New Braunfels Texas
No....if it was too far down.....it would look far worse than that......that gear got dry....for a short period of time.....notice how it is only scored toward the center where the gear is solid.....no residual to drip down form the gear teeth.....most likely it got aerated......
Is the pickup fully brazed to the pump all the way around? Is it a very tight press fit?
Jebby
Is the pickup fully brazed to the pump all the way around? Is it a very tight press fit?
Jebby
Thread Starter
Burning Brakes
Joined: Aug 2007
Posts: 892
Likes: 243
From: Green Valley Ca
No....if it was too far down.....it would look far worse than that......that gear got dry....for a short period of time.....notice how it is only scored toward the center where the gear is solid.....no residual to drip down form the gear teeth.....most likely it got aerated......
Is the pickup fully brazed to the pump all the way around? Is it a very tight press fit?
Jebby
Is the pickup fully brazed to the pump all the way around? Is it a very tight press fit?
Jebby
Thanks Bob
Instructor
Joined: Jun 2023
Posts: 201
Likes: 66
From: Orlando, FL.
It's a little bit like the "chicken or the egg" argument, did foreign particulate enter the pumping cavity and cause damage, or did the damage taking place create the particulate that caused greater damage? Dry does seem reasonable, but I'd be more inclined to believe possibly a simple case of an initial dry start-up occurrence, as once there is oil in the pump some aeration isn't so great an issue for that of consideration here. Always be sure to prime the oil system before first start-ups or in instances where the engine hasn't been operational for some period.
We always disassemble, even "new" pumps and inspect them for cleanliness, end-play sum and squareness, rotor to housing clearance, shaft bores, casting flash, etc, and freedom in rotation, including just possible handling damages, this often involving some sort of reworking before being installed.
And yeah, just replace it.
Scott.
We always disassemble, even "new" pumps and inspect them for cleanliness, end-play sum and squareness, rotor to housing clearance, shaft bores, casting flash, etc, and freedom in rotation, including just possible handling damages, this often involving some sort of reworking before being installed.
And yeah, just replace it.
Scott.
