Help with oil pump
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
Help with oil pump I am rebuilding my motor to stock specs and throwing a CC503/306 in it. I have been looking for a good oil pump to use. I will have the stock oil pan. I am so confused from all the threads I have read. I will need an oil pump, oil pump driveshaft, and a pick up tube/screen correct? Could anyone get me part numbers for what I need? I am lost with this little detail in my motor build. Thanks!
No don't want to use that pump cuz it's high volume in a std size pan. It'll suck it dry. Try NAL-12555884. That's a stock GM replacement with high pressure spring, std. volume. You'll have to reuse your pickup and shaft from the old motor, unless you don't have them or they are broke. I don't see any problem with reusing the parts, but others may disagree. Oil pump shafts are cheap. Pickups are about $15.
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: May 2006
Posts: 1,245
Likes: 15
From: Rockwall, TX
It says its a high pressure which is fine for a stock pan correct? Just not a high volume?
Originally Posted by dhdenney
No don't want to use that pump cuz it's high volume in a std size pan. It'll suck it dry. Try NAL-12555884. That's a stock GM replacement with high pressure spring, std. volume. You'll have to reuse your pickup and shaft from the old motor, unless you don't have them or they are broke. I don't see any problem with reusing the parts, but others may disagree. Oil pump shafts are cheap. Pickups are about $15.
i've never had any problem running a high volume in stock pan in my past 3 gen I engines anyone else?
not trying to say your wrong DH but never heard of that happening in a dd
also that was tet wrong kit mybad
not trying to say your wrong DH but never heard of that happening in a dd
also that was tet wrong kit mybad
Last edited by letsrun97z; Jun 26, 2007 at 10:19 PM. Reason: kit
Originally Posted by letsrun97z
i've never had any problem running a high volume in stock pan in my past 3 gen I engines anyone else?
not trying to say your wrong DH but never heard of that happening in a dd
not trying to say your wrong DH but never heard of that happening in a dd
Originally Posted by 69gto96z
It says its a high pressure which is fine for a stock pan correct? Just not a high volume?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
Originally Posted by the_merv
Melling M155..that is what I had in my LT1. It's a Standard Volume, High Pressure. I got the same thing now in my LSX, Melling High Pressure, Standard Volume. 
The High-Pressure aspect is created by the shape of the outlet hole on the Pump, and the internal design of the Pump. You might loose like a Pony out of all that, there is not much rotating mass, and not alot of resistance.
If I am wrong..someone chime in, but it's not like a Water Pump, an Oil Pump is puny, and how it's driven off of the Cam even helps it. Mine sits on the front of the Crank.
If I am wrong..someone chime in, but it's not like a Water Pump, an Oil Pump is puny, and how it's driven off of the Cam even helps it. Mine sits on the front of the Crank.
Originally Posted by the_merv
The High-Pressure aspect is created by the shape of the outlet hole on the Pump, and the internal design of the Pump. You might loose like a Pony out of all that, there is not much rotating mass, and not alot of resistance.
If I am wrong..someone chime in, but it's not like a Water Pump, an Oil Pump is puny, and how it's driven off of the Cam even helps it. Mine sits on the front of the Crank.
If I am wrong..someone chime in, but it's not like a Water Pump, an Oil Pump is puny, and how it's driven off of the Cam even helps it. Mine sits on the front of the Crank.
i have the m155 but be careful there are lots of threads going around with mellings stuff breaking and being thinner castings than the old stuff, just to save money..do a lil reading around first
Teching In
Joined: May 2007
Posts: 5
Likes: 0
I had this same delima a few weeks ago...here's what I ended up going with:
Melling Select 10554 pump (std vol/std pressure)
Getting the GM white spring 3848911 to put in it for higher pressure
And then getting a new GM pickup tube, 12550042.
Be sure to tack weld the tube onto the pump so it doesn't fall off, and make sure its installed to pickup at the very bottom of the pan.
The Melling non-Select pumps are the ones having breakage problems because the casting is much thinner, so make sure you get the "Select" pump...here's pic of the comparison:
Melling Select 10554 pump (std vol/std pressure)
Getting the GM white spring 3848911 to put in it for higher pressure
And then getting a new GM pickup tube, 12550042.
Be sure to tack weld the tube onto the pump so it doesn't fall off, and make sure its installed to pickup at the very bottom of the pan.
The Melling non-Select pumps are the ones having breakage problems because the casting is much thinner, so make sure you get the "Select" pump...here's pic of the comparison:
