QUOTE(Chuck @ Jan 16 2008, 05:22 PM)
You can check the area visually. You can also do the big butt test to see if the car is sagging. that is, sit in the passenger seat and with the windows up, open and close the passenger door and see if it sticks which would indicate the car is sagging.
I think with the big butt test you should remove the top as this will add some support to a weak (even ok) longitudinal.
Also with the screwdriver or ice pick, be careful how hard you poke as the hardened tool could eventually bend or even poke through a good piece of metal. I did this before realizing that with a screwdriver and just moderate to heavy pressure with some twisting, not poking, rust will give way.
Jack points on both sides of the car should be in place. If not, it means either they've rusted away or the owner has done some rust repair w/o replacing the jack point. Get the stock jack out and jack up the car on both sides. The jack points shouldn't flex when lifting the car.
The rocker panels are a bitch since they hide one of the worst rust points (the longitudinals) on the 914. The panels are also held on by rivets so it's not an easy off and back on again piece. If the car as passed the muster to this point and you still want the car, you could negotiate with the owner that if he removes the rockers and it looks ok under them, that you will buy the car. I would imagine that the owner would not remove the rockers for a tire kicker potential buyer.
Jack the car and look inside the rear wheel wells towards the front of the car. You'll find lots of ugliness there as road debris tend to accumulate there and cause rusting. Do the same for the front.
Bubbles on the painted surface anywhere means either direct rust or bondo. Either one isn't good.
Rust under the rear trunk lid rear edge once you open it. Same for the front trunk.
Rust under the front trunk lid gasket and at the bottom of the front trunk lid gasket where all the water runs to.
Rust bubbles on the bumper edges, especially chrome ones.
Heater boxes on the ends of the heat exchangers. All heater related items should be in place. You live in NY so if you want to drive in weather below 60F, you'll need heat.
Check condition of heat exchangers. They shouldn't be loose on the exhaust pipes nor have holes or clamps (like mine
). Replacing the heat exchangers will cost $100-500 depending on used factory HE's or stainless steel HE's.
Not rust related:
o Check for protective cover under steering rack. This item rusts or isn't replaced when work is done.
o Front and rear valences for condition and/or if they're even there.
o Engine: if the FI is there and running, you should be ok. If there is a center carb., first
on it. If you want the engine with the center carb, expect to either re-FI the engine or buy dual Webers or Del'atoros for good performance.