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Cummins 8.3L ISC / 8.9L ISL Water Pump 1997-2012 | Bostech WP04305


Bostech's line of new heavy-duty water pumps are backed by our 24-month unlimited mileage warranty. We offer 50 plus skus covering most diesel engine applications. Our pumps are quality engineered according to the OEM's design and assembled with high-performance bearings, durable long-lasting seals, and for most applications upgraded impellers. Top-quality product direct from a Trusted Manufacturer - Bostech!

Engine Fitment:

  • Cummins 8.3L ISC
  • Cummins 8.9L ISL

Technical Information:

  • Housing Material: Cast Iron
  • Impeller Material: Steel
  • Impeller Vanes: Open 5 Vanes
  • Pulley Style: Smooth with Slant top
  • Pulley: 4.320 inches / 110mm Diameter
  • Mounting: 3 Bolt
Housing Material:
Cast Iron
Impeller Material:
Impeller Style:
Open 5-Vanes
Pulley Diameter:
4.320 inches / 110mm
Prop65 Warning:
WARNING: Cancer and Reproductive Harm -
Bostech / BT-Power's 24-Month Unlimited Mileage Warranty. Our warranty covers product replacement for material and/or workmanship defects up to 24-months from the product purchase date. Technical Support is available by contacting Bostech's Customer Service at 1-800-868-0057 or by emailing An RMA (Return Material Authorization) number given by Customer Service is required for all returns. You can view our Warranty Policy by clicking the "Help Center" at the bottom of the page and going to Policies & Procedures.