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And I decided ( I generally oil my cars underneath in the fall) but I put it off with the Saab as I am going to drop the front cradle to replace bushings and oil Undercoating makes it an unbelievable messy pita job.
And I took the opportunity to remove the rear inner fender liner to check the rear dogleg for rust based on a few comments on here. ( no dog leg rust ). But the plastic nuts on the retain studs when I tried to remove broke the studs. Mimmi told me the inner fender is double walled so I fearlessly drilled out and installed 5 mm rivnuts using stainless button head bolts and larger diameter washers to replace liner after treating any rust spots behind with rust paint and fluid film corrosion resistant sprayed into the threaded holes. The rear shock mounts and rear springs I already powdercoated when I installed new shocks ages ago. Powdercoat works very well.
The problem with the plastic nuts maybe using a 1/4 drive impact driver to remove rather than a hand ratchet driver , is shocking the studs and causing them to yield. The rocker panel covers are a similar problem. I was worried about rust underneath the rocker panel covers , but the way Saab built them the sill cover does not follow the metal rocker cover exactly , there is about two inches air gap. That’s important. Domestic GM vehicles like gen 1 Avalanche and most Pontiacs with plastic cladding the cladding is a flush fit to the steel underneath and it makes for total corrosion failure over time.
And I took the opportunity to remove the rear inner fender liner to check the rear dogleg for rust based on a few comments on here. ( no dog leg rust ). But the plastic nuts on the retain studs when I tried to remove broke the studs. Mimmi told me the inner fender is double walled so I fearlessly drilled out and installed 5 mm rivnuts using stainless button head bolts and larger diameter washers to replace liner after treating any rust spots behind with rust paint and fluid film corrosion resistant sprayed into the threaded holes. The rear shock mounts and rear springs I already powdercoated when I installed new shocks ages ago. Powdercoat works very well.
The problem with the plastic nuts maybe using a 1/4 drive impact driver to remove rather than a hand ratchet driver , is shocking the studs and causing them to yield. The rocker panel covers are a similar problem. I was worried about rust underneath the rocker panel covers , but the way Saab built them the sill cover does not follow the metal rocker cover exactly , there is about two inches air gap. That’s important. Domestic GM vehicles like gen 1 Avalanche and most Pontiacs with plastic cladding the cladding is a flush fit to the steel underneath and it makes for total corrosion failure over time.
