Quote:
Originally Posted by '76 911S 3.0
I've battled back and forth with splitting the case. The car has been in my family since 1978 and we know the entire history of the car and the engine. There has never been any metal in the oil, no abnormal noises, and never revved above 4000 rpm but maybe a handful of times. The case does not leak a drop of oil and my grandfather (retired Porsche Racing mechanic) rebuilt the engine in 1983. I had him take a look at the engine after teardown and he deemed it not necessary. But then again you can't know without tearing down completely and inspecting.
I must admit, I've had a few sleepless nights contemplating the idea of splitting the case and as the engine sits now, it's not too much work to get it back down to the case and split it. My biggest concern is the intermediate shaft bearings (which I have new ones). I'm still contemplating at this point.
There are plans for turbo down the road, Carrillo rods are in the future for this engine. When these are installed (perhaps a year from now when funds become available again), the case will be split and bearings replaced on the bottom end.
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The intermediate bearings are probably trashed. Has nothing to do with your use of the engine, they just go. Split the case and reassemble probably adds about 10 hours to the job. You can go with ARP rod bolts so you don't waste a set of Torque-to-Yield, same with bearings.