HomeBelts and Cooling > Water Pump and Related ComponentsDayco DP986 Engine Water Pump
Part #: DP986

Dayco DP986 Engine Water Pump

19 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Buick, Cadillac, and Chevrolet, Commercial Chassis, Roadmaster, Fleetwood, Caprice, and Impala
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Reliable Engine Water Pump for Buick, Cadillac, and Chevrolet

The Dayco DP986 engine water pump is designed to maintain optimal engine temperature for select Buick, Cadillac, and Chevrolet vehicles. Engineered for durability and precise fitment, this water pump supports efficient coolant circulation in your vehicle's cooling system.

  • Compatible with Buick Caprice, Cadillac Fleetwood, Commercial Chassis, Chevrolet Impala, and Roadmaster models
  • Direct replacement for original equipment water pumps
  • Engineered for consistent coolant flow and temperature regulation
  • Durable construction to withstand engine operating conditions
  • Part number DP986 ensures exact fit and function

Product Details and Compatibility

The Dayco DP986 engine water pump is specifically designed for use in select full-size GM vehicles, including the Buick Caprice, Cadillac Fleetwood, Commercial Chassis, Chevrolet Impala, and Roadmaster. This pump is manufactured to meet or exceed OEM specifications, ensuring reliable performance and longevity. The precision engineering of the DP986 supports proper coolant circulation, which is critical for preventing engine overheating and maintaining efficient operation.

Common Applications and Problem Resolution

  • Replaces failing or leaking water pumps in Buick Caprice and Cadillac Fleetwood
  • Addresses coolant circulation issues in Chevrolet Impala and Roadmaster engines
  • Prevents engine overheating caused by worn or damaged water pumps
  • Eliminates coolant leaks that can lead to engine damage
  • Restores proper cooling system pressure and flow in Commercial Chassis vehicles

Installation Notes and Tips

When installing the Dayco DP986 water pump, ensure the cooling system is fully drained before removal of the old pump. Clean the mounting surface thoroughly to prevent leaks. Use a new gasket or sealant as recommended by the vehicle manufacturer. Torque all bolts to factory specifications to avoid warping or damage. After installation, refill the cooling system and bleed air pockets to maintain proper coolant flow.

Quality Assurance and Warranty

Dayco manufactures the DP986 engine water pump to meet stringent quality standards, ensuring durability and reliable operation. While specific warranty details may vary, Dayco typically offers coverage against defects in materials and workmanship. Refer to the product documentation or manufacturer for exact warranty terms.

This part fits 19 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1996BuickRoadmasterN/ACompatible with vehicles equipped with serpentine belt driven systems.
1996CadillacCommercial ChassisN/ACompatible with vehicles equipped with serpentine belt driven systems.
1996CadillacFleetwoodN/ACompatible with vehicles equipped with serpentine belt driven systems.
1996ChevroletCaprice4.3LV8N/ACompatible with vehicles equipped with serpentine belt driven systems.
1996ChevroletCaprice5.7LV8N/ACompatible with vehicles equipped with serpentine belt driven systems.
1996ChevroletImpalaN/ACompatible with vehicles equipped with serpentine belt driven systems.
1995BuickRoadmasterN/ACompatible with vehicles equipped with serpentine belt driven systems.
1995CadillacCommercial ChassisN/ACompatible with vehicles equipped with serpentine belt driven systems.
1995CadillacFleetwoodN/ACompatible with vehicles equipped with serpentine belt driven systems.
1995ChevroletCaprice4.3LV8N/ACompatible with vehicles equipped with serpentine belt driven systems.
1995ChevroletCaprice5.7LV8N/ACompatible with vehicles equipped with serpentine belt driven systems.
1995ChevroletImpalaN/ACompatible with vehicles equipped with serpentine belt driven systems.
1994BuickRoadmasterN/ACompatible with vehicles equipped with serpentine belt driven systems.
1994CadillacCommercial ChassisN/ACompatible with vehicles equipped with serpentine belt driven systems.
1994CadillacFleetwoodN/ACompatible with vehicles equipped with serpentine belt driven systems.
1994ChevroletCaprice4.3LV8N/ACompatible with vehicles equipped with serpentine belt driven systems.
1994ChevroletCaprice5.7LV8N/ACompatible with vehicles equipped with serpentine belt driven systems.
1994ChevroletCommercial ChassisN/ACompatible with vehicles equipped with serpentine belt driven systems.
1994ChevroletImpalaN/ACompatible with vehicles equipped with serpentine belt driven systems.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.