Imago

The first step in a restoration is always documentation. The second must be the vision of the final goal. To make it easy, I usualy paint a sample for the owner and myself to get  hint how the car will look like. I dont thrust in prepainted samples, as they are ususaly quite a few miles from the actual color/dimension, soo I go for a good looking scale modell, and finish it by hand.
At this car I bought a realy-realy good modell, which was neary spot-on. It only needed a repaint.

The original color of the car was Felsengrün Metalic (699), with grey green interior. Quite rare combination. The picture is not realy telling the story, it is a bit more greenish in reality.

Problem 2

After removing the cooler cover we found no less than 7 broken cylinder studs :-o. No signs of blowby or oil loss. The engine was obviosly working when the car faced its faith. But with 7 broken cyinder studs out of 24, it would not work. For sure not under boost.

What had happened? We collected the information what we had at hand, and our best idea now is that the car was speeding, the engine was under boost. Whithin theese conditions the engine produces a lot of heat. Hottest it gets are the piston crowns, the valves and the combustion chamber suface. When the car was emergency stopped, and hit something, the engine was cut off imediately. Thus it had no time to dissipiate the heat, soo a heat shock occured. Pistons gave the heat to the cylinders, valves gave the heat to the cylinder heads as a result they all streched. The cylinder studs on the other hand, are not in metalic contact with the cylinders, soo they did not heated up quicly enough, thus not streched equaly to follow the cylinders. And soo they broke.

Maybe the problem was worsened by some overtightening of the bolts. We will never know.

Engine removal and dismantling

The engine and the gearbox came out fairly easy. The first impressions were all nice. The boost pipes and the intercooler was very clean, with no oil in the galleries. Although the engine stood for quite long time, soo this type of inspection is of limited effeciency.

Also the oil breather pipes were nice and clean.

Just like the inside of the air cleaner box.

Turbo looks like in good condition, although there is a bit of radial play on the boost side.

:-) some dark history of the engine unveiled. Memories kept by the rear engine mount.

Problem...

After removing the remains of the interior, we started on the engine bay.
First shock came when we drained the oil.
Any time we remove oil from an engine, we put a strong magnet in the oil flow, to detect any metalic particles, that might suggest problems. Normaly the magnet remains clear. Not now though...

This is definitely a piece of piston ring, which is... well... not a good sign. Although the edges looked a bit strange, soo we brung the item to the university for some microscopical inspection. 

As clearly visible, the edges, that are normaly razor sharp, are now well rounded down. We suspect that this parts was travelling inside the engine for quite long time. Maybe this is only a leftover of an old engine brakedown? Hope dies last... Anyway, it looks like we have to dismantle the engine now.

Inspection

As we knew, the car had a collosion, and the body was damaged. When we inspected the car, we tried to reconstruct the event to be able to find out how the body was distorted.

The front wheels showed clear signs of heavy braking. The left front end was damaged. The gaps around the bonnet showed that the rear end has moved out of center.

Soo, we now think, that the car was driven at high speed, when someting happened, and the driver started an emergency braking. (S)he could not manage to stop, and hit something at a modest speed, maybe 30-40kmh. At the collosion, the left front end receiced a primary damage, and it collapsed a bit. The left front door post came invards, the left side of the dash came up a bit. As the weight of the car was transfered to the front at braking, the rear end went up, and at the collosion this resulted in the back end bending down, and left as the engine mass stopped.

Now we have the problem to cure this body, and to starighten everything very carefully. This is a very strong car, it needs to be right at ech measuring points.

The beginning

30 november 2014

Ebay

Buying a Porshe 930 project? Good idea? Fro sure :-)?