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Starting at $31.95, AutoBuffy stocks 2 engine water pump housings from SKP and Dorman to fit your Dodge Grand Caravan. The water pump housing seals the pump assembly to the engine block and routes coolant through the cooling circuit. A cracked or warped housing causes coolant leaks and can quickly lead to overheating, gasket failure, and serious engine damage if left unaddressed.
The most important decision is material and fit: housings are made from cast iron, aluminum, or plastic composite, and each has different heat tolerance, corrosion resistance, and weight characteristics. OE-match fitment is critical because even minor dimensional differences in bolt-hole spacing or port diameter can cause improper sealing and premature coolant leaks.
| Option | Best for | What you get |
|---|---|---|
| OE Replacement (exact-fit) | Daily drivers and stock cooling systems | Factory dimensions, gasket-mating surfaces, and port placement; straightforward installation with no modifications |
| Cast Iron Housing | Older engines originally equipped with iron components or high-heat applications | Superior heat resistance and durability; heavier than aluminum but less prone to warping under sustained high temperatures |
| Aluminum Housing | Modern engines, weight-conscious builds, and performance applications | Lightweight, excellent thermal conductivity, and corrosion-resistant when properly coated; the most common factory spec on late-model engines |
| Plastic/Composite Housing | Budget-conscious repairs on engines with moderate thermal loads | Lowest cost and lightest weight; adequate for normal driving conditions but more susceptible to cracking over time in high-heat environments |
Drain the cooling system, remove any belts or accessories blocking access, and unbolt the housing from the engine block while supporting the pump assembly. Clean all mating surfaces thoroughly to remove old gasket material before installing the new housing with a fresh gasket, applying even torque to the fasteners in a cross pattern. Refill with fresh coolant, bleed any air from the system, and check for leaks at operating temperature before returning the vehicle to normal use.