Re: [AMC-list] Oil Pressure III

[Davis Martin <martin-davis@xxxxxxxxxxxxx>]

Um So does that mean the air is flowing in my tires? No...its more a combination 
of volume in a contained system. Yes  tighter clearances creat more resistance 
but thats not always good.(resistance that is) resistance creats heat. A better 
pump that moves more volume is better. It takes a combination of the two. 

 Tightening the bearing clearances may not be the answer...you couldnt know 
that.... without knowing what the clearances are now. This is why I asked what 
the clearances in the pump were set at. I didnt get the answer to that. Without 
knowing how the engine was put together we can only hypothisise. 

 As for what else that can be done..,,,no one has adressed the spring infront  
of the plunger. What spring is it:? Its possible its a weak spring. You 
could take the big bolt out thats holding in the spring and plunger and add a 
washer as a spacer between the bolt and the spring. That will increase your 
pressure as well. 

 Without knowing the specs of the build its all conjecture. 
Davis 



________________________________
From: "theamcguy@xxxxxxxxx" <theamcguy@xxxxxxxxx>
To: amc-list@xxxxxxxxxxxx
Sent: Sun, November 21, 2010 7:00:29 AM
Subject: Re: [AMC-list] Oil Pressure III

Oil pressure can be thought of in terms as resistance to flow. 40 lbs of oil
pressure means that the pump is overcoming 40 lbs of resistance before the
oil will flow. The important things are: Is the oil light off at idle? Do you
have 10 lbs of pressure for every 1000 rpm If you have both those then your
are within spec Although it does sound to me like your rebuilder set
everything up on the loose side with respect to your clearances. The only way
at this point to raise the pressure would be to tighten up on the main and
rod bearing clearances.

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