Overview
The Crown Automotive J8126774 is a steel water pump for the 134 F-Head 4-cylinder engine, specifically the version without an emission pump. The package includes the pump and its gasket, and Crown identifies it as an OE replacement with a direct-fit design.
This pump targets early Jeep CJ and Willys vehicles. Its listed fitment runs from the 1941–1942 Willys MB through the CJ3, CJ5, CJ6 and related CJ models into 1971, so owners of those older trucks can check their model against the list below.
Key features
- Steel construction in a natural finish
- Includes the water pump and gasket
- Designed for the 134 F-Head 4-cylinder engine without emission pump
- OE replacement, direct-fit type
- Covers several CJ generations and Willys models
Restoring an early CJ cooling system
Flathead-era cooling systems on the 134 F-Head four-cylinder depend on simple parts working well together. Scale and rust inside the block and radiator can restrict flow even with a good pump, so a pump swap works best with a clean system. Look at the radiator core, the upper and lower hoses and the fan belt tension before fitting the new unit.
The pump’s impeller and shaft are the main wear points, so check for play at the pulley and for leaks at the weep hole. Old pump bodies can crack around the mounting bolts, so inspect the casting for hairline cracks. Clean the engine face thoroughly and fit the new gasket with care, then keep the drain plugs tight once everything is reassembled.
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J8126774 |
| UPC | 70000704289 |
| Engine | 134 F-Head 4-cylinder, without emission pump |
| Included | Pump and gasket |
| Material | Steel |
| Finish | Natural |
| Fitment | Direct fit |
| Type | OE replacement |
Vehicle fitment
It fits the Jeep CJ3 (1959–1960, Base), CJ5 (1959–1971, Base), CJ5A (1966–1968, Base), CJ6 (1959–1971, Base) and CJ6A (1966–1968, Base), the Willys CJ-2 (1946–1949), CJ-3 (1949–1958), CJ-5 (1955–1958), CJ-6 (1956–1958) and the Willys MB (1941–1942, Base).
CJ7 and Wrangler YJ models are not on this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Because the gasket is supplied, scrape away all old gasket material from the engine face and make sure the surface is flat before fitting the new pump.
What’s included
The package includes the water pump and its gasket. Check the contents against your installation before starting.
