Damper Strut

WARNING: This page is about a different car, the 2003 Subaru Impreza and 2002 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Check for oil leakage.
Move the piston rod up and down to check that it operates smoothly without any binding.
Play of piston rod.
Measure the play as follows:

Fix the outer shell and fully extend the rod. Set a dial gauge at the end of the rod: L [.39" (10 mm)], then apply a force of W [20 N (2 kgf, 4 lb)] to threaded portion. With the force of 20 N (2 kgf, 4 lb) applied, read the dial gauge indication: P₁ . Apply a force of 20 N (2 kgf, 4 lb) in the opposite direction of "W", then read the dial gauge indication: P₂ . See Fig 1. The free play is determined by the following equation:

Play = P₁ , P₂

If the play is greater, replace the strut. See LIMIT OF PLAY SPECIFICATION table.

Fig 1: Setting Dial Gauge At End Of Rod

Courtesy of SUBARU OF AMERICA, INC.

LIMIT OF PLAY SPECIFICATION

Application	Specification
Limit Of Play	Less Than .031" (.8 mm)