Figured I'd post this since I don't think anyone has done this in my research across G8 forums.....
09' G8 GT needed major front end work -- riding stock FE2 and stock springs for 185K miles. That the ride was considered "rough" was an understatement
FYI -- G8 / Delco factory Front Springs are now a discontinued P/N by GM. (92203694).
Was able to direct replace them with PPV Front Struts up front (this we all know) and PPV Front Springs from a 2011-2013 Chevrolet Caprice PPV.
Caprice Front Strut P/Ns:
PPV Front Left Strut: Monroe 553017
PPV Front Right Strut: Monroe 553016
Caprice Front Springs:
PPV Front Springs: GM 92277174 (2x)
In researching, these springs apparently are slightly thicker than the G8 stock ones and have a bit higher spring rate as expected on the PPV.
I had seen on the boards that some people were trying to use the Chevy SS springs and were having issues with them retaining in the spring mounts (not sure upper or lower was the cause).
For good measure as part of the rebuild I also replaced both front spring retainer seat plates (uppers as the lower was integrated into the PPV struts) and the front upper rubber spring insulators off the 2013 Chevrolet Caprice parts line as well. The P/N's are the same apparently between G8 and PPV, as well as front strut bellow and bump stops:
Caprice Coil Spring Seats & Insulators:
PPV Front Upper Spring Retainer: GM 92257840 (2x)
PPV Front Upper Spring Insulator: GM 92279412 (2x)
PPV Front Bellow & Bump Stops: GM 19294124 or Delco 901064 (2x)
Paired with a set of the nice blue hybrid SuperPro SPF1590AK front strut mounts and we're flying again.
Rears are running Monroe 553018's PPV shocks with stock G8 rear springs for now....
There is definitely a difference in ride height and vehicle rake --- front wheel well height is roughly 7/8" - 1.0" of extra height versus the rear wheel wells with the rear G8 springs, but we'll see if it settles a tad over the next 500 miles. The rears on PPV rear shocks / stock rear G8 springs are about 4 years old / 45K miles, so they may have settled a bit over their lifetime.
09' G8 GT needed major front end work -- riding stock FE2 and stock springs for 185K miles. That the ride was considered "rough" was an understatement
FYI -- G8 / Delco factory Front Springs are now a discontinued P/N by GM. (92203694).
Was able to direct replace them with PPV Front Struts up front (this we all know) and PPV Front Springs from a 2011-2013 Chevrolet Caprice PPV.
Caprice Front Strut P/Ns:
PPV Front Left Strut: Monroe 553017
PPV Front Right Strut: Monroe 553016
Caprice Front Springs:
PPV Front Springs: GM 92277174 (2x)
In researching, these springs apparently are slightly thicker than the G8 stock ones and have a bit higher spring rate as expected on the PPV.
I had seen on the boards that some people were trying to use the Chevy SS springs and were having issues with them retaining in the spring mounts (not sure upper or lower was the cause).
For good measure as part of the rebuild I also replaced both front spring retainer seat plates (uppers as the lower was integrated into the PPV struts) and the front upper rubber spring insulators off the 2013 Chevrolet Caprice parts line as well. The P/N's are the same apparently between G8 and PPV, as well as front strut bellow and bump stops:
Caprice Coil Spring Seats & Insulators:
PPV Front Upper Spring Retainer: GM 92257840 (2x)
PPV Front Upper Spring Insulator: GM 92279412 (2x)
PPV Front Bellow & Bump Stops: GM 19294124 or Delco 901064 (2x)
Paired with a set of the nice blue hybrid SuperPro SPF1590AK front strut mounts and we're flying again.
Rears are running Monroe 553018's PPV shocks with stock G8 rear springs for now....
There is definitely a difference in ride height and vehicle rake --- front wheel well height is roughly 7/8" - 1.0" of extra height versus the rear wheel wells with the rear G8 springs, but we'll see if it settles a tad over the next 500 miles. The rears on PPV rear shocks / stock rear G8 springs are about 4 years old / 45K miles, so they may have settled a bit over their lifetime.
