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DIESELSITE 7.3L High Volume Low Pressure Oil Pump

HIGH VOLUME Low Pressure Oil Pump for the 7.3L.
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Product Description

New! Redesigned and more volume than our previous low pressure pump!!

Dieselsite's HIGH VOLUME Low Pressure Oil Pump will fit the 1994-2003 7.3L PSD. This high volume LPOP supplies more volume to handle the higher demands of larger HPOPs. Also provides additional oil for twin turbos. Most importantly, it will provide a better supply of lubricating oil to protect your engine with better lubrication and cooling to main bearings and piston oilers.

We set out to make not only a larger pump, but also a better built pump. Each set of gears is custom cut and ground as a set and then final grounding to housing to achieve final clearance. This insures perfect mating from gear to gear and from the gears to both the front cover and the timing cover. This insures less wear and better efficiency. We have seen the "off the shelf" aftermarket replacement pumps be out of parallel from the back to the front surface of the pump as well as the mounting surface to be machined so poorly that they wobbled on a flat surface. They rely on the gasket to seal (which it does), but that surface inconsistency allows the gears to move in an undesirable manner. This could cause low oil pressure, and in extreme cases, scoring or damage to the timing cover.

The gears must be installed so that the "Damper" side with the deeper relief part is facing towards the harmonic balancer. (as shown) Failure to do this will cause catastrophic damage to the front cover.

Our new HV LPOP (high volume low pressure oil pump) includes the new front cover with dual lip viton seals, new pump cover to front engine cover gasket, and new oil pump gears designed to increase flow and pressure while reducing cavitation.
Installation is simple requiring only a few basic tools as well as a fan removal tool and a harmonic balancer puller. (these can be rented/borrowed from a local Auto Zone if you don't own them) Install time is about 2 hours.
No other modifications must be made. This can be bolted onto any configuration from stock to highly modified engines.

Please note: Replacing the pump will not "fix" a worn engine or bad timing cover. If you have scratches or wear in the timing cover, you can now repair with it with our new repair kit. See below in related items.

Below is an example of a truck with normal miles for the year. Exact numbers are not guaranteed, but a comparable result should be expected.

Stock Pump:

Startup (65º)
Idle (680 RPM): 40 psi
Hi Idle (1100 RPM): 50 psi

Warm (170º):
Idle (680 RPM): 20 psi
Crusing (2200 RPM): 40 psi
Free Rev (3500 RPM): 52 psi

HV Pump (After initial install):

Startup (65º)
Idle (680 RPM): 52 psi
Hi Idle (1100 RPM): 65 psi

Warm (170º):
Idle (680 RPM): 32 psi
Crusing (2200 RPM): 55 psi
Free Rev (3500 RPM): 70 psi

HV Pump (After 6000 miles):

Startup (65º)
Idle (680 RPM): 51 psi
Hi Idle (1100 RPM): 62 psi

Warm (170º):
Idle (680 RPM): 32 psi
Crusing (2200 RPM): 55 psi
Free Rev (3500 RPM): 68 psi