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996 3.4 X51 Oiling Setup. One Side Or Two?

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been looking into the X51 oiling setup for the 3.4 engines, the one where the head scavenge pump is replaced with a dual pump and a line to the far corner of the head to allow pooling oil to be collected from here also.

ive only got limited info on this ie part numbers and a one page drawing from porsche showing how it routes. does anyone have any definatives on this or other info.

from the various things ive found on the web and from the drawing it looks like it only fits to the one side of the engine, on the right, however given that the overall engine design is symmetrical im wondering if it should actually be applied to both heads and im missing the text portion stating this. why would it pool only in the corner on 456 side and not on the 123 side when each side is essentially a mirror image with its own scavenge pump?

any info anyone has would be great. i couldnt find the TSB for this and the workshop manual doesnt cover it either. loren, if you can share your wisdom id be much obliged.

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The 3.4 liter X51 was only sold in Europe. I think you might have trouble finding the parts today.

The detail is covered in the 996 Carrera service manual. When it was sold I believe it was a Porsche only upgrade (i.e. parts were sent to Porsche for the machining etc.).

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thanks. ill check again in my manual and see if i can find the relevant section.

ehm.......yeah. its there in the manual hidden under the heading "3.4 engine x51" which explains why i couldnt see it when i looked haha. now thats embarrassing. id looked right through the lubrication section but didnt think it would be at the start next to torque info.

thanks for the direction. ill get a read over it and see what it says

Edited by thewightstuff
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