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Scorpio
Joined: 05 Jul 2007 Posts: 1957 Location: Brisbane, Australia
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Posted: Tue Dec 21, 2010 8:37 am Post subject: pilot bearing removal |
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Absolutely the most anoying thing ever
Notice 20kg weight on slide hammer---bent nail-- bent slide hammer puller handle
looks worse then it is but i dont think i ruined the interference fit of the old hole
ended up just grinding it out--4-5 hrs of BS
_________________ 1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT
Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!! |
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Rich H
Joined: 10 Jun 2007 Posts: 2665 Location: Preston, Lancs, UK
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Posted: Tue Dec 21, 2010 10:10 pm Post subject: |
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Grind - it's the only way. _________________ 1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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peterld
Joined: 10 Dec 2006 Posts: 946 Location: Noosa Heads QLD Australia
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Posted: Tue Dec 21, 2010 10:48 pm Post subject: |
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Scorp.......love those Chinese safety boots! Pretty shade of white....must be food service grade. _________________ 80/81 932/8 ROW |
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fiat22turbo
Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR
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Posted: Wed Dec 22, 2010 5:11 am Post subject: |
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Huh, mine came out without grinding:
http://www.924board.org/viewtopic.php?t=32178 (see bottom of the thread)
You just need the proper tools (A long bolt/stud, a couple of nuts, a large washer and a plumbing adapter), a little heat to expand the outer metal and a cooling spray to contract the inner portion.
Finally, patience is the key. Going slow and making sure you don't strip the threads. Use a standard ratchet and gently apply more and more pressure until it begins to move. _________________ Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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poorsha924
Joined: 13 Nov 2007 Posts: 143 Location: Kansas City Mo
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Posted: Wed Dec 22, 2010 6:29 am Post subject: pilot bearing removal |
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Its a little late now but next time notice there is a threaded hole in the pilot beraing I believe it is 10MM, thread a long bolt into it & tighten the bolt it will bottom out on the end of the crank & pushes the pilot bearing out much easier
poorsha924 _________________ 79 924S snailshell
audi big bore t-body
16" turbo wheels |
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Rich H
Joined: 10 Jun 2007 Posts: 2665 Location: Preston, Lancs, UK
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Posted: Wed Dec 22, 2010 6:52 am Post subject: |
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Or it'll just rip the threads out of the pilot bearing housing.... like mine did. _________________ 1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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Scorpio
Joined: 05 Jul 2007 Posts: 1957 Location: Brisbane, Australia
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Posted: Wed Dec 22, 2010 11:56 am Post subject: |
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Rich H wrote: | Or it'll just rip the threads out of the pilot bearing housing.... like mine did. | as did mine.... And the majority of people who have tried 'porsches' method
Heating may have worked when the crank was off but I unfort didn't do it then and if I did it now I would have damaged the rubbery seal _________________ 1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT
Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!! |
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leadfoot
Joined: 11 Dec 2002 Posts: 2222 Location: gOLD cOAST Australia
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Posted: Wed Dec 22, 2010 11:17 pm Post subject: |
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Is the turbo pilot bearing the one that sits in the flywheel or is there another that sits inside the crank too?
Stu _________________ 1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress... |
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Rich H
Joined: 10 Jun 2007 Posts: 2665 Location: Preston, Lancs, UK
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Posted: Wed Dec 22, 2010 11:33 pm Post subject: |
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Turbo sits in the fly only, N/A bearing case sits in the crank only. _________________ 1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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fiat22turbo
Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR
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Posted: Thu Dec 23, 2010 6:08 am Post subject: |
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Scorpio wrote: | Rich H wrote: | Or it'll just rip the threads out of the pilot bearing housing.... like mine did. | as did mine.... And the majority of people who have tried 'porsches' method
Heating may have worked when the crank was off but I unfort didn't do it then and if I did it now I would have damaged the rubbery seal |
The heat won't hurt the seal as long as you only heat the center of the crankshaft. You don't need to make it cherry red, just warm enough to expand a bit, then hit the center with a cool spray to cause it to contract quickly to reduce the friction and any corrosion that may contribute to holding it in place. Do it a few times quickly, back to back and it should make it a little easier to remove without destroying it.
A little PB Blaster (not WD-40, which is a lubricant, not a product for breaking up rust) or similar corrosion reducing liquid. Diesel fuel and ATF supposedly work better than anything on the market for breaking rusty parts free.
Also, you don't turn the bolt to push the pilot bearing housing out using the threads, you use the threads to hold the bolt while you use the nut against the washer to pull the piece out. _________________ Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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Slam
Joined: 07 Jan 2005 Posts: 1689 Location: Wainwright, Alberta, Canada
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Posted: Thu Jan 20, 2011 8:03 am Post subject: |
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Well, Scorp, you didn't read the How-To section like a good little mechanic. Stefan posted a great procedure after I'd put up some stuff.
Still, you got it out and that's what matters.
http://www.924board.org/viewtopic.php?t=32178 _________________ '84 944 - kid blew motor
'83 944 - resting comfortably. For 12 years
'87 944 - sideswiped by trucker
'80 924 - gone
'78 924 - gone
'77 924 - rusting comfortably |
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Julian
Joined: 24 Jan 2011 Posts: 74 Location: Oxford Ohio
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Posted: Wed Jan 26, 2011 1:29 am Post subject: Pilot |
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Heat around the outside of the hole can help. There is an old trick that works sometime. Fill the hole with the most thick bearing grease you can find, take the input shaft from an old tranny or a solid bar the same size as the input shaft.
Drive the input shaft or the bar into the pilot hole with a large hammer. The grease will be driven under the backside of the bearing and hydrolyticly move the bearing outward. Will not work ALL the time, but worth a try before frustration takes hold. |
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Scorpio
Joined: 05 Jul 2007 Posts: 1957 Location: Brisbane, Australia
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Posted: Wed Jan 26, 2011 1:44 am Post subject: Re: Pilot |
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Julian wrote: | Heat around the outside of the hole can help. There is an old trick that works sometime. Fill the hole with the most thick bearing grease you can find, take the input shaft from an old tranny or a solid bar the same size as the input shaft.
Drive the input shaft or the bar into the pilot hole with a large hammer. The grease will be driven under the backside of the bearing and hydrolyticly move the bearing outward. Will not work ALL the time, but worth a try before frustration takes hold. | Tried it-- no luck, our pilot bearings don't have a decent sized inner face surface area like a normal bearing _________________ 1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT
Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!! |
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Joes924Racer
Joined: 03 Nov 2002 Posts: 11964 Location: Oregon, Denver Colorado native!
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Posted: Fri Mar 18, 2011 6:55 am Post subject: |
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... Its not here. _________________ 1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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sbarc
Joined: 01 Feb 2010 Posts: 545 Location: West Coast of Canada
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