New 4 Cylinder Engine Bare Block
Fits 41-53 Jeep & Willys with 4-134 L engine (Out of Stock)

New 4 Cylinder Engine Bare Block

Free Shipping on oversized item!!

Finally the 4-134 L engine has been reproduced!!

All machined surfaces are milled to original design specifications. Block includes: Valve guides; hardened valve seats, NPT threaded oil galley plugs, freeze plugs and camshaft expansion plug.

- Cylinder Bore: 3.1255 +/- .0005
- Valve Guide  Bore Diameter (In & Ex): .374 +/- .0005
- Valve Seat Surface Width: .09375? to .125 +/- .0005
- Tappet Bore Diameter: .626 +/- .0005
- Oil Galley Taps/Plugs:  NPT 1/8 & NPT 3/8
- Oil Galley Taps - Tapered

The machining operation is using automated CAD CNC machining with tolerances exceeding .0005 inches-far more precise and exceeding the tolerances of American-made '40s Willys engines.

Sample blocks were completely maped on a Coordinate Measuring Machine (CMM) and created a 3-D drawing in Solid Works to begin the process. The CMM factory used can measure up to 1.5 micrometers in accuracy (0.000059").

In effect, they reverse engineered the 4-134 L engine block and set it up as such. Instead of using a green sand casting as the original blocks were made, they used the investment cast method for more structural integrity and durability, as well as surface finish and machining surfaces, even though it is more expensive. In addition, the new grey iron blocks have a higher content of chromium and copper for added strength and durability over the original design.

About of the 4-134 L Engine Block / Warranty Information

Test Run Operations Log

Each block has an individual serial number.

They are each coated with a rust inhibitor and shipped in a wooden crate and come with a warranty and general prep information and each has an inspection tag with critical specs.

Application
4-134 L engine  (GEAR TO GEAR)

Fits:
41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
50-52 M38
46-49 Truck
46-49 Station Wagon
48-49 Jeepster