New engine... No oil pressure.. WTF!!!!
New engine... No oil pressure.. WTF!!!! Gentlemen,
Well, I have been working on this motor for a while. Everything is new. The short block was assembled by a guy that builds race motors. I did the rest.
I was very careful when I installed the ported oil pump (MTIs) and pickup. Installed the new blue O ring. Buttoned up everything carefully..
Today I hooked it up for the first time and hit the key.. The oil pressure gauge did not move. (note: this is just with the starter. I do not have the coils hooked up and I have removed the fuse to the fuel pump)(yes it has 6 qts of Castrol GTX in it)
I would have expected a reading on the pressure gauge..
Is this normal or did I screw something up??
Any help would be apprexciated..
Thanks in advance for your input!!
Well, I have been working on this motor for a while. Everything is new. The short block was assembled by a guy that builds race motors. I did the rest.
I was very careful when I installed the ported oil pump (MTIs) and pickup. Installed the new blue O ring. Buttoned up everything carefully..
Today I hooked it up for the first time and hit the key.. The oil pressure gauge did not move. (note: this is just with the starter. I do not have the coils hooked up and I have removed the fuse to the fuel pump)(yes it has 6 qts of Castrol GTX in it)
I would have expected a reading on the pressure gauge..
Is this normal or did I screw something up??
Any help would be apprexciated..
Thanks in advance for your input!!
Joined: Nov 2001
Posts: 3,043
Likes: 0
From: Texas and Qatar
Starter alone on a dry setup sometimes won't pump enough oil to have pressure. I'd start it and if you don't have pressure in 4-5 seconds then kill it. Possibly missing the front or rear oil galley plug to be loosing that much pressure if it don't get on startup.
Last edited by -Joseph-; Apr 20, 2005 at 07:27 PM.
It mostly likely didnt have enough time to pick it up. Put it all back together then try. Dont run it long if it has no oil pressure. It does'nt take no time to fry the bearings.
Thanks guys..
I THINK I feel better.. I will hook up the fuel and spark in the morning and see what happens. With all this money invested, I am being very carefull as far as this new motor is concerned. (Darton 427)
In the "good old days", I would have filled the oil pump with grease and it would have primed itself almost immeadiately..
Times do change...
I THINK I feel better.. I will hook up the fuel and spark in the morning and see what happens. With all this money invested, I am being very carefull as far as this new motor is concerned. (Darton 427)
In the "good old days", I would have filled the oil pump with grease and it would have primed itself almost immeadiately..
Times do change...
It took about 4 times @ about 10 sec. each time before I saw oil pressure (coils unpugged and fuel pump fuse removed). You might check your connection to the sending unit. As added insurance I hooked up a mechanical gauge. Both the mechanical and my dash gauge were reading about 40 psi after the 4th try with just the starter turning the engine. Once I plugged in the coils and installed the fuel pump fuse it instantly was reading 65 psi once the engine cranked.
definitely hook up a mechanical gauge because oil pressure sending unit's are often broken during installs...if it is not reading then i would go with what everyone else says...just be careful i'm sure you would hate to kill an engine that's got big $$$ invested
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TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
I'm glad that it worked for you. I went thru the same thing with a new motor.
Finally hooked up a mechanical gauge and cranked with no spark plugs up 40 psi with the starter. Put the plugs in and started it, 10 psi 15, 20, 25. After the second or third try got up to 50 max, but it is real sluggish, like the o ring (brand new) did not seal, or the pickup is too close to the bottom of the pan
Anyhow, that mother is coming out 
Finally hooked up a mechanical gauge and cranked with no spark plugs up 40 psi with the starter. Put the plugs in and started it, 10 psi 15, 20, 25. After the second or third try got up to 50 max, but it is real sluggish, like the o ring (brand new) did not seal, or the pickup is too close to the bottom of the pan
Anyhow, that mother is coming out LS1 Tech Stories
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I'm under the impression it's worse to crank the motor trying to get oil pressure rather than starting it.It ussually takes me 4-5 seconds to see pressure on a new motor when it's started.
