Nissan KA engine

=Summary= The Nissan KA series of engines includes both a SOHC 12-valve and a DOHC 16-valve version of a 2.4 L inline 4-cylinder. It is a descendant of the Nissan NA, Z, and L, series of engines. Rods and pistons are interchangable (in sets) between the KA24E and the Z24. Like the NA and Z series, the KAs are also have a cross flow head design.

Specs

 * Displacement:
 * Bore:89 mm
 * Stroke:96mm
 * Horsepower: 140 (105 kW)
 * Torque: 152 (206 Nm)
 * Compression ratio: 8.6:1 (9.1:1 for early 1989 240SX )

KA Cylinder Head on L/Z bottom end
The cylinder head of the KA engines shares the same bolt pattern and cylinder spacing as the Z and L series engines which makes the 12-valve head a virtual bolt on for these earlier engine blocks. This has been confirmed to be a viable swap when using the 12 valve engine, however 16 valve swaps may or may not be feasible. When using a 12 valve head on a Z or L block the Z series timing cover and timing set must be utilized as well as the L series, four spark plug distributor. If the KA fuel injection is being used the KA's crank angle sensor should be used in the distributor position. There is also an oil drain back hole that must be welded up in rear of the KA head, that interferes with a coolant hole in the L and Z blocks.


 * This swap has several advantages over the complete engine swap
 * able to use a stock 510 oil pan
 * stock 510 engine mounts
 * stock 510 front crossmember