LS3 Oil priming/no oil pressure
05-04-2018, 01:20 PM
#1
LS3 Oil priming/no oil pressure Just got ready to fire my GM crate LS3, bought in October. I swapped to the ls1 pan and pick up tube, and was careful to ensure the blue o ring seated without getting pinched.
I primed it with the X prime tool in March, and then did so again last night. I connected it via the oil galley passage that the alternator covers.
As an additional step I pulled the ign and fuel pump fuse and cranked the motor three times a few seconds each. I never got oil pressure. That I didn’t get fuel pressure is concerning. What should I do here?
I primed it with the X prime tool in March, and then did so again last night. I connected it via the oil galley passage that the alternator covers.
As an additional step I pulled the ign and fuel pump fuse and cranked the motor three times a few seconds each. I never got oil pressure. That I didn’t get fuel pressure is concerning. What should I do here?
05-06-2018, 11:11 AM
#2
Just cranking the motor is not going to be enough for an oil psi reading. All its doing is just that, priming. If you have primed it fully and oil is present up top on the rockers, then you're good to go and fire it up. Oil psi should come up shortly after. Are you using a mechanical gauge? Where do you have the gauge connected?
05-06-2018, 12:07 PM
#3
Yes, there is oil on the rockers.
The inline mechanical gauge on the external pump is the only one hooked up (read 30 psi).
I was relying on the dash gauge during the cranking, following the procedure on page
Page 3 Start-up and Break-in procedure
LS376/480 and LS376/525 EFI Crate Engines Specifications
The inline mechanical gauge on the external pump is the only one hooked up (read 30 psi).
I was relying on the dash gauge during the cranking, following the procedure on page
Page 3 Start-up and Break-in procedure
LS376/480 and LS376/525 EFI Crate Engines Specifications
05-06-2018, 01:11 PM
#4
ModSquad
iTrader: (6)
Your good to go. Fire it up!