New Engine Priming
#1
New Engine Priming
Just installed a new remanufactured 5.4l 3v in my 2004 f150. There weren't any instructions for priming the oil system before startup.
I did some googling and found a service bulletin that states to unplug the injectors and cops so no fuel or spark are in the cylinders and to turn the motor over via the key / starter for 3 x 15 second intervals. I would think that doing this would register some sort of oil pressure on the idiot gauge, but without having a real gauge, I get an uneasy feeling about this. Id like to be sure that oil is flowing somehow.
I watched a video by meling oil pumps about a forced priming system they offer for the modular motors, but it requires the use of the oil pressure sensing port - which the 5.4l doesn't have.
Anyone else have any ideas on priming for a first time startup on a fresh motor?
Thanks
I did some googling and found a service bulletin that states to unplug the injectors and cops so no fuel or spark are in the cylinders and to turn the motor over via the key / starter for 3 x 15 second intervals. I would think that doing this would register some sort of oil pressure on the idiot gauge, but without having a real gauge, I get an uneasy feeling about this. Id like to be sure that oil is flowing somehow.
I watched a video by meling oil pumps about a forced priming system they offer for the modular motors, but it requires the use of the oil pressure sensing port - which the 5.4l doesn't have.
Anyone else have any ideas on priming for a first time startup on a fresh motor?
Thanks
#2
Nothing needed other that making sure it's full of oil..just start her up!! If would make you feel better go by the SB you found, but it probably won't register on the idiot gauge. After starting and you don't see the needle (or light) go up within a few seconds, then shut it off. don't worry !!
#3
#4
I would just flip the fuel inertia switch and do the 3x15 second deal. I think priming is a good idea. If your worried about it pull the oil filter after doing the 3x15 deal and see if is full of oil.. probably just start unscrewing it if oil starts dripping out your good.
#7
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#8
#9
DISCLAIMER: I DO NOT know if this works on prior to '04 (drive by wire) or not!!!
Last edited by code58; 09-07-2011 at 01:44 AM.
#11
#12
IF I were a betting man, my money would be that the THROTTLE cable engines MAY NOT disable the injectors, but that's ONLY a guess. It's really easy for them to do that on a "drive by wire" set-up, probably not as easy on conventional cable like yours.
#13
I have even read that some use "white lube, light grease, and a variety of other lubes" in the oil pump upon engine assembly because they aid the "prime". The lubes easily and quickly are absorbed into the oil.
#14
Code, mine is a throttle cable motor and it will not start with the pedal floored. But I don't know if that is because the injuctors are disabled or the spark is shut off. I think the PCM does shut off the injectors.