Help, low oil pressure in new swap
#1
Help, low oil pressure in new swap
Ok, so I've been working over the winter to swap a '06 LS2 from a Trailblazer SS into my '67 Firebird.
I just started it up last Saturday and have around 40PSI when the oil is cold but drop to 0 psi when it warms up.
What I do wrong, or is the motor/oil pump toast?
I'm running a RetroLSX oil pan, and Mobil 1 5W30 synthetic.
If I didn't get the o ring on the pick up tube seated correctly would this be the result?
I didn't remove the front or rear covers and I have no leaks anywhere.
I'm not sure how long the motor sat before I got it but suppose to have around 50K miles. Everything looked good when I had the pan and heads off.
So I emptied the oil, looked ok. so I put new oil back in and put about 6 ounces of seafoam in the oil. ran it for a bit and can see about 14 psi at idle but still drops to zero after a bit of idling.
Gonna try again tomorrow to run it, then gonna change the oil to 10W30 and see what the pressure is like. If that don't help then I'm gonna start with pulling the pan.
Any help or ideas ?
I just started it up last Saturday and have around 40PSI when the oil is cold but drop to 0 psi when it warms up.
What I do wrong, or is the motor/oil pump toast?
I'm running a RetroLSX oil pan, and Mobil 1 5W30 synthetic.
If I didn't get the o ring on the pick up tube seated correctly would this be the result?
I didn't remove the front or rear covers and I have no leaks anywhere.
I'm not sure how long the motor sat before I got it but suppose to have around 50K miles. Everything looked good when I had the pan and heads off.
So I emptied the oil, looked ok. so I put new oil back in and put about 6 ounces of seafoam in the oil. ran it for a bit and can see about 14 psi at idle but still drops to zero after a bit of idling.
Gonna try again tomorrow to run it, then gonna change the oil to 10W30 and see what the pressure is like. If that don't help then I'm gonna start with pulling the pan.
Any help or ideas ?
#3
TECH Senior Member
iTrader: (12)
+1 on the most common problem is the O-Ring, pinched, or the wrong sized one.
The second one would be that the pickup is not seated correctly. Did you check the pickup and bottom of oil pan clearance ?.. mine had about 3/4" between the bottom and the pickup.
Did you take anything else apart..the Oil Gallery plugs ? Check you oil filter, replace it.
Good luck..
BC
The second one would be that the pickup is not seated correctly. Did you check the pickup and bottom of oil pan clearance ?.. mine had about 3/4" between the bottom and the pickup.
Did you take anything else apart..the Oil Gallery plugs ? Check you oil filter, replace it.
Good luck..
BC
#6
I pretty sure the gauge is accurate, they are new Dakota Digital VHX series. and secondly I can "hear" the loss of oil pressure, the valve train gets lound and pitons sound like they're knocking.
Trending Topics
#8
I did the same thing in my hybrid hot rod. At an idle, it had 0 oil pressure when it was warm. I had to pull the engine back out. I installed a new oil pump O-ring and it was good to go. Make sure you get the right O-ring for your application. GM had different ones for different applications.
They are color coded for a reason, like stated above, if the pickup tube has a recessed area where the o-ring goes you need the thicker RED o-ring. The trucks use this design.
GM Oil Pick-Up Tube O-Ring (1st Design)
12557752
BLUE SEAL
Specifics:
* Oil Pick-Up Tube O-Ring ea.
* Chevy/GMC Pick-Up (1999-2000 LS V8) 1st design
* F-Body (1998-2002)
* Cadillac CTS-V (2004-2007)
* Corvette (1997-2008)
* Thickness = 3.55mm (0.140")
ID = 23.60mm (0.930")
GM Oil Pick-Up Tube O-Ring (2nd Design)
12584922
RED SEAL
Specifics:
* Oil Pick-Up Tube O-Ring ea.
* Chevy/GMC Pick-Up (1999-2000 LS V8 engines with 2nd design pick-up tube)
* Trailblazer (2003-2008 With LS V8 engine)
* Hummer H2 (2003-2008)
* Hummer H3 (2008 With LS V8 engine)
* Chevy/GMC Pick-Up (2001-2008 LS V8 engines)
* W- Body (2006-2008 With LS V8 engine - Impala, Lacrosse, Grand Prix)
* Thickness = 4.20mm (0.165")
ID = 20.69mm (0.815")
They are color coded for a reason, like stated above, if the pickup tube has a recessed area where the o-ring goes you need the thicker RED o-ring. The trucks use this design.
GM Oil Pick-Up Tube O-Ring (1st Design)
12557752
BLUE SEAL
Specifics:
* Oil Pick-Up Tube O-Ring ea.
* Chevy/GMC Pick-Up (1999-2000 LS V8) 1st design
* F-Body (1998-2002)
* Cadillac CTS-V (2004-2007)
* Corvette (1997-2008)
* Thickness = 3.55mm (0.140")
ID = 23.60mm (0.930")
GM Oil Pick-Up Tube O-Ring (2nd Design)
12584922
RED SEAL
Specifics:
* Oil Pick-Up Tube O-Ring ea.
* Chevy/GMC Pick-Up (1999-2000 LS V8 engines with 2nd design pick-up tube)
* Trailblazer (2003-2008 With LS V8 engine)
* Hummer H2 (2003-2008)
* Hummer H3 (2008 With LS V8 engine)
* Chevy/GMC Pick-Up (2001-2008 LS V8 engines)
* W- Body (2006-2008 With LS V8 engine - Impala, Lacrosse, Grand Prix)
* Thickness = 4.20mm (0.165")
ID = 20.69mm (0.815")
#10
Nice post ... That explains my problem as well ... had 60 psi when i first started my new motor
now its at 0.... i got the new blue ones i though were a upgrade from red....
they did fit kinda loose so i put 2 blue ones and it seemed good but i guess not
I will try the red ones now
now its at 0.... i got the new blue ones i though were a upgrade from red....
they did fit kinda loose so i put 2 blue ones and it seemed good but i guess not
I will try the red ones now
#11
TECH Senior Member
iTrader: (12)
You guys might want to check in the the BRP oil pump/pickup Gridle.. great piece.. ! Cheap insurance.. !
http://www.brphotrods.com/mm5/mercha...gory_Code=CNV1
http://www.brphotrods.com/mm5/mercha...gory_Code=CNV1
#15
This might be a waste of time, but I think I'm going to try to lift the motor enough the get the oil pan out of the way and see if I can check/replace the o ring without pulling the motor. If not out comes the motor and I think I'll go ahead and replace the pump while it's out, even though I think it's ok. Cheap ($185) insurance.
Here's a dumb question...Is there a right or better way to install the o ring and pick up tube to make sure it's done right...the second time? LOL
Here's a dumb question...Is there a right or better way to install the o ring and pick up tube to make sure it's done right...the second time? LOL
#19
I don't remember what the color was. I have learned a lot since I started this in November, and I really didn't pay that much attention to it. It came with the RetroLSX kit and I used it. Sad thing is I already sold the Trailblazer SS pan and pick-up so I can even check what was in it.
I do I figure that out?
Do I buy one for the Trailblazer SS pump, or the RetroLSX pick up???
Any tips to make sure it's seated properly?
I do I figure that out?
Do I buy one for the Trailblazer SS pump, or the RetroLSX pick up???
Any tips to make sure it's seated properly?