Oil pump

Scott06

Admiral
Joined
Apr 20, 2014
Messages
7,123
OK, I installed a oil pressure gauge to the motor and as you can see I am getting almost 64 pounds of pressure at roughly, I think my drill turns 1200 RPMs. I did get oil up to the Top part of the motor coming out at the rocker arms but it did take quite a while. Is this a normal reading?
You are good to go then . Ive seen it take a while as well, especially if oil is cold and lifters are empty.
 

ericcarr

Petty Officer 1st Class
Joined
Jul 27, 2009
Messages
291
But is it normal to have the 64 pounds of pressure though? My drill is turning at around 1200 RPMs, that seems a little bit high. I guess it’s because the oil is cold and I’m not even sure the weight of it
 

Scott06

Admiral
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Apr 20, 2014
Messages
7,123
But is it normal to have the 64 pounds of pressure though? My drill is turning at around 1200 RPMs, that seems a little bit high. I guess it’s because the oil is cold and I’m not even sure the weight of it
With cold oil yes it will peg at idle. Your drill at 1200 is turning the oil pump at same speed as 2400 engine rpm as cam timing chain is a 2:1 reduction. Hot idle will be around 15 -20 psi or so.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
51,209
Stock pressure relief valve is 70psi

Depending on oil viscosity and temp along with the oil clearances, 65 psi on cold oil is a good sign
 
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