Why is oil leaking from the bottom of my Porsche 993?
Although the 993 has a dry-sump lubrication system, oil can settle in the bottom of the cases and seep past the return tube o-rings with the engine off, leaving you with an oil puddle. These tubes are easily inspected for leaks and can be replaced rather quickly. Figure 7. Underside of engine showing oil return tubes.
Can a through bolt be replaced on a Porsche 993?
The replacement of a through-bolt o-ring is not as simple as removing the bolt and swapping in a new o-ring. The engine is required to be disassembled for the o-rings to be replaced. As with the timing chain cover gaskets, 993 owners will typically live with a through-bolt leak until an engine rebuild or engine disassembly is necessary.
Is the Porsche 993 the last air cooled car?
This article applies to the Porsche 993 (1993-1998). The Porsche 993 is the last iteration of the air-cooled engine 911 and is therefore the culmination of years of engine development. However, even with the best engineering, age will eventually catch up with items such as rubber seals and o-rings located in the engine.
Where is the rear main seal located on a Porsche?
The rear main seal, often referred to as “RMS,” is located at the rear of the engine (pointing to the front of the car) and seals the end of the crankshaft in the engine cases. The flywheel attaches to the end of the crankshaft and the transmission is then mated to the engine cases.
What causes coolant leak on Porsche 997 Turbo?
What happens is that over time the seals between the engine block and the outlet tubes fail, eventually leading to a coolant leak. A minor drip here or there isn’t a big deal, but on a high horsepower, rear-engined car, having the possibility of putting engine coolant under the rear tires is not something we like to envision!
What to do if your coolant pipe fails on your Porsche?
Coolant Pipe Failure on the Porsche 997.1 Turbo 911. The Solution for the OEM Porsche Plastic Coolant Pipes: Upgraded Metal Coolant Outlets! Although not cheap, investing the money to properly maintain your Porsche is much cheaper in the long run than waiting on minor issues until they cause a major problem.
What causes an oil leak in a Porsche 911?
A failing air oil separator (aos) is the likely cause of rear main seal failure and oil leaks, as it is in other VAG cars. Crankcase vacuum exceeds the normal range in the engine under heavy acceleration and sucks in air damaging the rear main seal.
Why does my Porsche 911 have a vacuum problem?
Crankcase vacuum exceeds the normal range in the engine under heavy acceleration and sucks in air damaging the rear main seal. This is commonly seen on Audi engines as well.