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WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Valve Spring Seat

Courtesy of CHRYSLER GROUP, LLC

Install the spring seat (1).

Fig 2: Valve Spring & Valve Spring Retainer
Courtesy of CHRYSLER GROUP, LLC

NOTE:
If the valve springs are being reused, reassemble them into their original locations. Number 5 cylinder exhaust valve spring shown in illustration, all other valves similar.
Install the valve spring (2) and valve spring retainer (1).

Fig 3: Compressing Valve Spring & Locating Valve Retaining Locks
Courtesy of CHRYSLER GROUP, LLC

NOTE:
Number 3 cylinder intake valve spring compression shown in illustration, all other valves similar.
Compress valve springs (3) with the Valve Spring Compressor Adapter (special tool #10224, Adapter, Valve Spring) (2) mounted in the Valve Spring Compressor (special tool #C-3422-D, Compressor, Valve Spring) (1). Install the retaining locks (4) and release the valve spring compression.

Fig 4: Checking Valve Spring Installed Height
Courtesy of CHRYSLER GROUP, LLC
If the valves or valve seats have been refinished, check the installed height of the valve springs (4). If the installed valve spring height (4) is greater than 40.0 mm (1.575 in.), install an additional spring seat (8) in the head counterbore under the original valve spring seat (8) to bring the spring height back within specification. Make sure the measurement is taken from the top of spring seat (6) to the bottom surface of spring retainer (1).
Install the cylinder head(s). Refer to CYLINDER HEAD, INSTALLATION .