This one owner 1987 930 3.3 Turbo underwent a full engine and transmission rebuild. At 90,000 original miles and 30 years of drive time, we also address a few other mechanical issues and oil leaks during the build.
We first evaluated and disassembled the engine. This evaluation helps us to determine the extent of build needed and also enables us to address the owner’s build preferences. All components were cleaned, then fully evaluated, tested and measured. The camshafts, rockers and connecting rods were all in need of reconditioning. All oil port plugs were removed to properly clean the oil passages in the crankshaft. We then installed new oil port plugs and micro polished and balanced the crankshaft. The intermediate shaft was replaced, as well as the timing chains, ramps, and tensioners. New Mahle pistons and cylinders were installed, along with new ARP cylinder head studs and rod bolts. The pistons were balanced, as well as the connecting rods end to end. The cylinder heads were resurfaced and new valve guides were installed. Then all valve seats were cut on our Mira precision valve seat cutting machine from Switzerland. New performance valves were installed and valve lengths were set. New valve springs were pressure tested and spring heights were set. Deck height and compression ratio were checked and adjusted. The fuel distributor, warm up regulator, fuel pump, ignition distributor, CDI box, turbo, waste gate, turbo oil pump, intake and recirculating valve housing and alternator, were all rebuilt. The wiring harness was gone through and all connectors and contacts were cleaned or replaced. The original muffler had a few cracks that we welded. All bearing specifications were checked and recorded. Upon assembly, we measured and recorded all fitment and clearance specifications.
After the build was completed, we properly broke in and set up the engine. Once we had 100 miles on the engine, we changed the oil and filter, cut open the filter (to check for debris), took an oil sample, adjusted the valves and went over the engine set up one last time. The owner was given a maintenance interval protocol to follow for proper care of the engine during the remainder of the break-in period.
The transmission was fully disassembled, cleaned and checked. All worn, synchros, sliders, guide teeth, and bearings were replaced with new factory Porsche parts as needed.
Engine Build
Transmission Build
