Dropped oil pan found crank scraping on block!
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#6
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I didn't know you went to Sebring. Did we meet?
Sorry I didn't get to hang with a few more people.
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looks normal
That looks completely normal to me. I agree, machining of the block before it was assembled. If your drain plug is not accumulating metal scrap, I wouldn't even check for end-play. Of course, you'd have to spend considerable more time to check the end-play, but you can always cut-open your oil filter & check your drain plug. I don't think I've ever found metal on the drain plug before. The most I've ever seen on an abused engine couldn't be smelted to make even a BB. I've re-sealed/rebuilt a few engines: all had circular machining marks like that.
Your crank could NOT touch the block unless that thrust bearing is toast, for which your drain plug would have little triangular-ish flat pieces of bearing material: should be very obvious. Course, turn the engine over (1/2 breaker bar & a deep 27mm socket, clockwise from the front), & listen for scraping/grinding, take an LED Flashlight & a dentist mirror & you'll see it's probably no where close.
Mark
Your crank could NOT touch the block unless that thrust bearing is toast, for which your drain plug would have little triangular-ish flat pieces of bearing material: should be very obvious. Course, turn the engine over (1/2 breaker bar & a deep 27mm socket, clockwise from the front), & listen for scraping/grinding, take an LED Flashlight & a dentist mirror & you'll see it's probably no where close.
Mark
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Dial Guage on the flywheel - use a mag base on the steering rack plate.
Pry the flywheel forward and back.
Looks fine to me - but best to check the end play.
Pry the flywheel forward and back.
Looks fine to me - but best to check the end play.
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
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Thanks Roger, that looks like the answer I was asking in the other topic:
What if a 928 had an incorrect adjustment for a period of time, but was then adjusted properly. The thrust bearing could be worn allowing too much axial crankshaft play, correct? If so, is there any way to determine this without dropping the pan?
What if a 928 had an incorrect adjustment for a period of time, but was then adjusted properly. The thrust bearing could be worn allowing too much axial crankshaft play, correct? If so, is there any way to determine this without dropping the pan?
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Normal. Every 928 engine I have looked at has that. I know of no 5 speeds that have ever had TBF. And I have a 88 block with TBF at the shop for comparison purposes. Not very pretty.
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Tampa,
I learned a trick from an old guru about checking for tolerances. Scribble a little on the block with a sharpee, then while it's stilll wet, turn the crank. If it's smudged it's rubbing, if it's not, you're good.
I learned a trick from an old guru about checking for tolerances. Scribble a little on the block with a sharpee, then while it's stilll wet, turn the crank. If it's smudged it's rubbing, if it's not, you're good.
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Piling on:
90 GT, 109K miles. ('Scuse the grime.....)
FWIW, I just about had a heart attack when I saw this, but then realized that all the machining is on the wrong side of the webbing to be TBF....
90 GT, 109K miles. ('Scuse the grime.....)
FWIW, I just about had a heart attack when I saw this, but then realized that all the machining is on the wrong side of the webbing to be TBF....