DHD 500-112 High Performance High RPM LB7 & LLY Duramax Water Pump

Dirty Hooker Diesel 500-112 High Performance High RPM Water Pump LB7 LLY Duramax

With the advancements in technology and tuning, these Duramax diesels are producing more horsepower and torque than originally intended and thus the water pump suffers. We have come up with a solution to the problematic water pump on the 2001-2005 LB7 & LLY Duramax Diesels. Our water pump does not utilize the heavy cast water pump wheel, but a light weight resin wheel. Our lightweight impeller prevents impeller spin and decreases cavitation traditionally encountered at high RPM. Each pump cover is modified to bolt right in place of the existing pump. Everything is included with the pump in order to install.

Warranty 12month/12,000 miles

Features:

100% OE Grade GM Water Pump Base Components
Lightweight Resin Impeller Wont Crack, Loosen or Spin off the Pump Shaft @ High RPM
Modified Pump Cover to be 100% Compatibly with your LB7 and LLY
Upgraded Stainless Hardware and Seals Included
Pump Comes Assembled, Ready to Install.
Kit Includes:

94011603 Bypass Tube Lower O-Ring
94013304 Pump to Front Cover Large O-Ring
12635594 Pump Outlet Flange Gasket
Long Stainless Bolt to Block Replace Stud
Short Stainless Bolt
Why Not Welded Water Pump?

With DHD's resin wheel water pump impeller there is no need to have any components welded. We have found that welding of two dissimilar metals nearly always results in cracks or premature failures. Its also not uncommon to have pump shaft bearing failures on welded pumps. This is likely because of small imperfections induced into the bearing surface from an arc created while the welder is grounding.
Things to consider:

Traditional green coolant (ethylene glycol) or coolant beyond its service life is high in acids. These acids are aluminums worst enemy. To ensure longevity and performance of your water pump we recommend you replace your coolant during this install. Aluminum degradation will not be covered by warranty.