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I wasn't watching the auction so I didn't see whatever non-constructive posts that got removed, but it seemed that the seller was actually reasonably restrained, given all the back and forth about how to measure end play distracting from what looked like an otherwise well-presented 928. I think he's wrong about the relative amounts of runout between a crank pulley vs. a flywheel, but perhaps one could get a decent measurement by taking three measurements of the crank pulley 120 degrees apart? Dumb to do it that way since the pinch bolt needs to be undone first anyway, but in theory it could work.
All that said, he's probably going to be less enthusiastic about bringing another automatic GTS to BAT, with all the attendant effects that will have on the market for them.
All that said, he's probably going to be less enthusiastic about bringing another automatic GTS to BAT, with all the attendant effects that will have on the market for them.
Or maybe he’ll spend the extra 2-ish hours to do a proper CEP.
Originally Posted by Rob Edwards
… I think he's wrong about the relative amounts of runout between a crank pulley vs. a flywheel, but perhaps one could get a decent measurement by taking three measurements of the crank pulley 120 degrees apart? …
I don’t see how runout of anything effects this measurement no matter where you do it. CEP value isn’t the result of measurement against an absolute reference. It’s the result of measuring the distance between two points each of which would have exactly the same measurement offset due to any runout. Or, in other words, it doesn’t matter how distorted is the flywheel (or whatever on the engine front if one’s doing it the “wrong” way) at the location touched by the dial indicator since that location doesn’t change when you move the crank to gather CEP data.
LOL, you're right, I'm simultaneously underthinking and overthinking it. It's an axial measurement. Free the pinch bolt, lever the crankshaft (and everything still bolted to it) fore and aft and measure the distance moved. Done.
It's early here, was up way too late obsessing about rear wiper arm bolt cover variants. That's my excuse and I'm sticking to it.
LOL, you're right, I'm simultaneously underthinking and overthinking it.
No worries. I'm glad to know that I'm sufficiently "on my meds" this morning.
Originally Posted by Rob Edwards
It's early here, was up way too late obsessing about rear wiper arm bolt cover variants. That's my excuse and I'm sticking to it.
It's all good. I keep all the various front wiper arm covers in stock. Rears... hmmm... might need to do that.
Originally Posted by linderpat
Yes, the seller was a bit testy about it all.
I will leave to the wider audience speculation as to the cause of the seller's presentation of the CEP measurement result and his "theory" on proper methodology.
1985 Guards Red in Pittsburgh on Facebook ("Porsche 928") 134K miles with broken ODO. Interesting for a project. Guys owned it for a year. Not an enthusiast with my chats on Facebook. Asking $4000.
1985 Guards Red in Pittsburgh on Facebook ("Porsche 928") 134K miles with broken ODO. Interesting for a project. Guys owned it for a year. Not an enthusiast with my chats on Facebook. Asking $4000.
Saw this one today. Walked away @$3k. Mechanically a nightmare!
Saw this one today. Walked away @$3k. Mechanically a nightmare!
Any details on that? From the pics you can only see the interior is partly disassembled and missing some bits. A bad sign, but it sounds like maybe that is the least of it.
Any details on that? From the pics you can only see the interior is partly disassembled and missing some bits. A bad sign, but it sounds like maybe that is the least of it.
I drove 3.5 hours to check it out with an offer of $3K. Dreary rainy trip. He had it running when I got there. Such a racket from either the torque tube bearing or the torque convertor bearings. Couldn't hear the engine. Drove it. The dash was lit up like Christmas tree with the Low brake fluid flashing, timing belt tension, tail light out, brake pad warning, no turn signals, headlights didn't retract, brake pedal soft, no power barely got up the hills in Pittsburgh. It took me 5 minutes to tell him I won't buy it at any price and wished him luck. He didn't even clean out the junk strewn about the interior.
That is nice one!
Not much is needed to return it to it's original configuration
Rims, steering wheel and rear muffler, I would say.
He told me he got quite a few calls as soon as he placed the ad. No one has produced any cash yet, but because of that he thought that maybe he's not asking enough!
He told me he got quite a few calls as soon as he placed the ad. No one has produced any cash yet, but because of that he thought that maybe he's not asking enough!
Nice car with a good option combo! I'd say its a fair price, assuming its a "needs nothing, everything up to date" 928
That’s one of “mine.” I did its *first* timing belt in ‘07 and no one else but me touched it until after ‘20. Head gaskets done in ‘17.
It’s gotta be about the most “unmolested” 928 you’ll find; untouched by hands “learning” how to work on a 928. Whoever bought it better take it to the very short list of 928 wrenches that won’t screw it up.
12-01-2022, 07:19 AM
It's an axial measurement. Free the pinch bolt, lever the crankshaft (and everything still bolted to it) fore and aft and measure the distance moved. Done. 
