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Originally Posted by Mike_Yi
Something else that is very important is to prime the engine. It's been sitting for months. Where do you think the oil is right now? On the rings? Nope. It's all in the sump.
So what you do is disconnect the coil(s) and crank it until you get a normal oil pressure reading. Unfortunately, in this car there isn't an oil pressure gauge. So you'll just have to crank it for a bit. Anything is better than just firing it up. In my Firehawk, it generally takes about 10-15 seconds of cranking to get a normal oil pressure. Since you don't have a gauge, and this motor is not a GM v-8, I'd crank it for 20-30 seconds to be sure. Then, reconnect the coil(s) and fire her up.
By disconnecting the coil, you will be preventing combustion. This will prevent putting a lot of pressure against the piston while there is no oil in the engine.
Of course, the best way to prime the engine is with a primer. On GM V-8s, you can remove the distributor (which is driven by a gear off the oil pump) and use a special tool on a drill which will spin the oil pump. I don't know if there is a way to do that on the Boxster.
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Mike,
What you suggest would be an excellent procedure if you could power the oil pump externally via a power drill to charge the oil galleries and pressurize the system to float the internals such as the GM small block you describe, I've had some Brit cars where you could do this as well. And then there is an electric pre-luber system which does the same thing using an electric powered pump.
But for the Boxster it's not such a good idea.
Think about it... what you're describing is turning the motor dry on the battery/starter motor in order to avoid turning the motor dry via combustion. While that may sound same-same, it really isn't.
The starter motor operates at a set RPM, much lower than idle and much lower than necessary for the oil pump to achieve maximum pressure/flow. Cranking it on the starter means you have to crank it dry longer than if you had the engine running to charge and pressurize the system, if you even achieve that at all on the starter.
Not only that, but on the Boxster there isn't a single coil... there are 6 individual coilpaks, inaccessible except from underneath, making what you describe a very cumbersome procedure.
Nope, for the Boxster, I'd say once you know everything is loose and not binding by manually rotating the drivetrain, start the car right up.
Cheers!