WP‑630 Water Pump – GM 250 / 292 Inline‑Six (1965–1972)
type: Unknown Type
Vendor: CorvairFarmer
Description:
WP‑630 is a mechanical water pump used on 1965–1972 Chevrolet, GMC, Buick, Oldsmobile, and Pontiac vehicles equipped with the 250 or 292 inline‑6 engines. This is the classic GM “tall‑deck” L6 pump used across trucks, full‑size cars, and mid‑size platforms.
It’s a cast‑iron, standard‑rotation pump with a long snout and high‑flow impeller — a staple for GM six‑cylinder restorations.
🔧 Specifications & Dimensions
| Attribute | Value |
|---|---|
| Part Number | WP‑630 / AW630 / 43034 |
| Type | Mechanical water pump |
| Rotation Direction | Standard (clockwise) |
| Housing Material | Cast iron |
| Impeller Material | Stamped steel |
| Hub Height | ~5.90–6.00 inches |
| Inlet Size | 1.75" |
| Pulley | Not included |
| Gasket | Usually included |
| Country of Origin | USA / Mexico / China (varies) |
| Shipping Weight | ~7–8 lbs |
| Box Dimensions | Approx. 10" × 8" × 6" |
🚗 Verified Fitment Chart
(GM 250 / 292 inline‑six applications)
| Make | Model | Engine | Years |
|---|---|---|---|
| Chevrolet | C10 / C20 / C30 | 250 / 292 I6 | 1965–1972 |
| Chevrolet | Chevelle / Malibu | 250 I6 | 1966–1972 |
| Chevrolet | Nova | 250 I6 | 1968–1972 |
| Chevrolet | Impala / Bel Air / Biscayne | 250 I6 | 1965–1972 |
| GMC | 1000–3500 Series | 250 / 292 I6 | 1966–1972 |
| Pontiac | Firebird | 250 I6 | 1967–1969 |
| Buick | Skylark | 250 I6 | 1968–1972 |
| Oldsmobile | F‑85 / Cutlass | 250 I6 | 1966–1972 |
Notes:
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WP‑630 fits both short‑deck 250 and tall‑deck 292 engines.
-
Not interchangeable with later metric‑pattern pumps (post‑1975).
🔁 Cross‑References
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Airtex AW630
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Gates 43034
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GMB 130‑1420
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ASC WP‑630
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ACDelco 252‑630
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NAPA 55‑630