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1956322

Oil change noises

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So everytime I change my oil on first start up until pressure hits I get noise..I think knocking.. As soon as there's any movement on my oil pressure gauge dead silent...I can let it sit for weeks and silent on start up.. Never any bad noises or bad pressure just that first start up after a change.. I've had other vintage engines do similar things.. Just wondering if anyone else experiences this.. Been doing it for years and is driven Dailey so I doubt there's any real problem...

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Oil pump may lose prime when oil is drained would be my guess,as noise stops when oil pressure goes back up .have you dropped pan and check oil pickup on pump?

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No I haven't I did ask my wife where she thought the noise was coming from.. She thought top of motor maybe towards front.. Thinking lifters  losing prime.. Although it sounds way worse in the car lol

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If you changed the filter, did you prime the filter (i.e., fill at least partially with oil) if your configuration permits this?

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22 minutes ago, 1956322 said:

But what about all the nailheads running the canister filter that can't be pre filled..

You can easily put a quart in the canister before installing.

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If it's "up top", then it's probably the lifter galleys needing to be "re-charged" and purged of air.  That was a common situation on earlier '70s Chevy big-blocks until they started using screw-in galley plugs that had a .030" hole drilled in them (per a prior TSB about this).

 

I certainly would pre-fill the oil filter before installation.  Then add the balance of the quart to the sump after the rest of the oil.  Can't hurt.  

 

Might unplug the coil wire and spin the motor with the starter right after the change.  When oil pressure comes up, then plug the coil wire back in and enjoy.

 

NTX5467

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Maybe we should ask the persons age when they post a question.........that might allow us to adjust our answers based on age. 

After maybe 30 years of working on cars, most of us have already made lots of mistakes and sometime "presume" the person asking the question has some history with old cars. 

There are just a lot of "things" we believe everyone already knows........based on our years of mistakes. 

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On 10/30/2018 at 11:03 PM, NTX5467 said:

Do you do regular steaks?

 

C'mon -- give the guy a brake...  :huh:

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I too never make mistakes but … apparently one day back in 1967, I made what everyone thought was a wrong mistake but turns out that in 1994 it was discovered that I had not and was right after all  … so does that count ? :blink:

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