Join Date: Sep 2007
That's a low pressure gas strut just btw. You can lift those by hand. Even high pressure gas struts exert very little pressure.
As for the spring compressor slipping well so can a jack. The spring is restrained anyway. It's not as if you'd be dealing with a compressed but otherwise totally free spring.
The main reason not to use a spring compressor is that an ordinary jack could be used instead. The key element either way would be to know the ride height you need to simulate.
Easiest would be to torque everything up and then have the suspension loosened and retorqued while the car was on the type of lift that lifts the car by the wheels.
1991 Alfa Romeo 164L 5 spd
White on grey leather 230K km, owned from new