When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
LOL - yes, it is, but that was a fresh filter I put that on after I drained out all the oil and removed the Bosch one that was there.
I didn't want anything from the filter to drain back into the case after got it on the stand and turned it over.
Yes, and thanks for the reminder on that. I actually did measure the axial play before I disassembled the crank carrier assembly, and will also do this after the sub-assembly is put back together.
This is the tool I used (thanks again Harbor Freight). Mount it on the crank carrier, push the crankshaft all the way to the opposite direction of the flywheel and then zero the indicator.
Then pull the crank outward and measure the distance. Mine measured at 0.052.
Here is the excerpt from one of the workshop manual PDFs' I referenced earlier.
Great post and smart move going ahead with the rebuild now and doing it yourself is a great way to get even more personal with the m96. Is scoring typically more prevalent on the 456 side, if so, why?
Great post and smart move going ahead with the rebuild now and doing it yourself is a great way to get even more personal with the m96. Is scoring typically more prevalent on the 456 side, if so, why?
More knowledgable will drop in, but I've read: yes 456 side more common and related to some increased forces on that side due to engine design. But, what do I know...just enough to be dangerous!
More knowledgable will drop in, but I've read: yes 456 side more common and related to some increased forces on that side due to engine design. But, what do I know...just enough to be dangerous!
The piston pins are offset in the factory pistons. It is theorized that the offset is not optimal on the bank 2 side since Porsche opted to use one piston for both sides, meaning one bank (2 in this case), doesn't have the correct offset.
They did this on the Cayenne V8 as well and eventually came up with a piston that was specific for the Cayenne/Panamera that used bank specific offsets. In fact, the same piston is used between the six and eight cylinder engines.
More knowledgable will drop in, but I've read: yes 456 side more common and related to some increased forces on that side due to engine design. But, what do I know...just enough to be dangerous!
Originally Posted by Charles Navarro
The piston pins are offset in the factory pistons. It is theorized that the offset is not optimal on the bank 2 side since Porsche opted to use one piston for both sides, meaning one bank (2 in this case), doesn't have the correct offset.
They did this on the Cayenne V8 as well and eventually came up with a piston that was specific for the Cayenne/Panamera that used bank specific offsets. In fact, the same piston is used between the six and eight cylinder engines.
very interesting, had no idea there were different piston pin offsets for bank 1 and 2. How much deviation in the offsets are we talking about, thousandths of a mm? Do you know if the 997.1 has the same issue as I believe borescoring is also quite prevalent on those engines.
07-06-2018, 05:16 PM
