Porsche Classic today revealed its latest reissue part, the magnesium crankcase for historic 911s. The part means that owners who crack their case no longer have to attempt to weld it back together or scavenge a replacement.
The automaker will be making crankcases for 2.0-, 2.2-, 2.4-, and 2.7-liter engines for F and G series 911s and 912s. That means that owners of certain models from 1964 to 1989 can now easily find a magnesium replacement block for their vehicle.
“This reissue closes another gap in our range of spare parts, making it possible to build completely new engines for most classic 911 models,” said Ulrike Lutz, Director of Porsche Classic. “There’s a lot of demand from our customers for true-to-original engine components like this.”
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The release of this crankcase follows the reissue of aluminum crankcases for larger-engined 911s from the ’90s. Porsche says that it leaned on the experienced gained during that process for this latest product.
In order to create the aluminum crankcases, the automaker sought to reproduce the racing engine from the famed Group C dominating 962. To do that, it looked at old engine drawings in its archive. Frustratingly, the drawings weren’t entirely decipherable, so it had to interview former and current staff members, all of which provided data that it was able to use for the magnesium crankcase, as well.
Porsche says that for these reissued parts, it bases its work on the latest, most developed version of the part. It then uses CAD and a supplier casts the case using the sand casting method, and then uses a five-axis CNC machine to finish the crankcase.
For this particular part, it bench tested the crankcase on the most powerful version of the engine from the era, which in this case was the 911 Carrera RS 2.7, which made 207 hp (154 kW/210 PS). Porsche Classic ran the engine through endurance tests before breaking the engine down and examining it bolt by bolt.
One of 80,000 spare parts that can be ordered from Porsche Classic, the automaker says that it is now working on replica crankcases for other generations of the 911.
