08-31-2012, 05:21 AM
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#21
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Registered User
Join Date: Jul 2008
Location: austin
Posts: 824
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This is a little far fetched.....
There is a very small pin that is the far end of the chain guide post.
that the chain guide rests and rotates on.
If that pin sheared off, the end of that post could be "floating"
and when the chain is stressed it's vibrating against the inner wall of the
chain guide chamber?
I broke one upon reassembly one time when I was torqueing the chain guide post.
Mike
__________________
Drivers: '15 Panamera Hybrid (wife's), ' 01 996 GT2, 00 Boxster S, '96 993 Çab/Tip (wife's)
Race Cars: '75 911 RSR Replica & '99 Spec Boxster
mike@lonestarrpm.com
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09-01-2012, 06:47 AM
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#22
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DIY extremist
Join Date: Jul 2011
Location: Brooklyn
Posts: 348
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No idea, but I'm thinking now of just driving the car a bit around the block to see if by making the noise I can possibly wear down whatever is interfering or misaligned. If the noise gets better, I keep driving, if worse head back. I'm going to make a WAG though that it's not gonna change. I have a feeling this engine's going to be coming apart...
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"Betty" -- 2000 Boxster S, Triple Black, loaded except PSM (sold to a good home)
"Veronica" -- 2008 Boxster S, Arctic Silver on Blue
"Maleficent" -- 2007 Cayman S, Red and Black, TPC Turbo 3.6L 460 RWHP, H&R RSS Coilover / TPC stage 2 suspension
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09-01-2012, 06:53 AM
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#23
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DIY extremist
Join Date: Jul 2011
Location: Brooklyn
Posts: 348
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I checked the oil filter and there was no debris in it, metallic or otherwise.
__________________
"Betty" -- 2000 Boxster S, Triple Black, loaded except PSM (sold to a good home)
"Veronica" -- 2008 Boxster S, Arctic Silver on Blue
"Maleficent" -- 2007 Cayman S, Red and Black, TPC Turbo 3.6L 460 RWHP, H&R RSS Coilover / TPC stage 2 suspension
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09-01-2012, 06:55 AM
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#24
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DIY extremist
Join Date: Jul 2011
Location: Brooklyn
Posts: 348
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So, weirdly I have a shaft that will ONLY accept a single row bearing (I measured to be sure), but the cover is definitely dual-row type.
__________________
"Betty" -- 2000 Boxster S, Triple Black, loaded except PSM (sold to a good home)
"Veronica" -- 2008 Boxster S, Arctic Silver on Blue
"Maleficent" -- 2007 Cayman S, Red and Black, TPC Turbo 3.6L 460 RWHP, H&R RSS Coilover / TPC stage 2 suspension
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09-01-2012, 06:55 AM
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#25
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Registered User
Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
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Quote:
Originally Posted by black_box
No idea, but I'm thinking now of just driving the car a bit around the block to see if by making the noise I can possibly wear down whatever is interfering or misaligned. If the noise gets better, I keep driving, if worse head back. I'm going to make a WAG though that it's not gonna change. I have a feeling this engine's going to be coming apart...
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I think that's an extremely bad idea. Noises generally don't go away with positive results.
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09-01-2012, 07:50 AM
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#26
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Theoretical propagandist
Join Date: Dec 2011
Location: Pacific Northwest
Posts: 793
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There is no possibility of a good outcome from this that prevents you from spending less money. Either take the bull by the horns and get it into a qualified mechanic to fix this or you might as well just start throwing money away my friend.
__________________
When life throws you curves, aim for the apex...
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09-01-2012, 08:15 AM
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#27
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DIY extremist
Join Date: Jul 2011
Location: Brooklyn
Posts: 348
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Quote:
Originally Posted by stephen wilson
I think that's an extremely bad idea. Noises generally don't go away with positive results.
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Normally, I would agree with you, but after reviewing some recordings I made of the noise earlier, it does actually seem like the noise is abating somewhat compared to before.
__________________
"Betty" -- 2000 Boxster S, Triple Black, loaded except PSM (sold to a good home)
"Veronica" -- 2008 Boxster S, Arctic Silver on Blue
"Maleficent" -- 2007 Cayman S, Red and Black, TPC Turbo 3.6L 460 RWHP, H&R RSS Coilover / TPC stage 2 suspension
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09-01-2012, 09:50 AM
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#28
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,277
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Probably because whatever is making the noise is slowly wearing away..........but that does not mean it is getting better, just that it is wearing away.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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09-01-2012, 09:56 AM
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#29
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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I've been working on engines of all types since the age of 8.. Cars, trucks, tractors and jets.
I haven't heard a "good" noise yet. The engine is screaming to you that its hurting. Either you listen to it and do whats required, or it will show you who the boss is.
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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09-01-2012, 02:15 PM
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#30
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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I vote a screwed up chain guide or tensioner. If you put enough miles on her, the noise is guaranteed to stop.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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09-02-2012, 01:12 AM
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#31
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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BB...
Above has been half a dozen very knowlegable people giving you the same good advice - don't procede without due care & caution. And the advice is for free too.....
Now you may believe you know more than this collective brains trust and you may have plenty of money to burn on your engine, but if I were you I would think long & hard about the possible (probable) outcome of "just driving the car a bit".
It really looks like its time for some professional advice (and that's not being defeatist, just smart looking at the potential outcome). I suspect it will be a lot cheaper than the suck it and see action you are proposing.
__________________
2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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09-02-2012, 10:19 AM
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#32
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Registered User
Join Date: Sep 2010
Location: UK
Posts: 303
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i would agree with the above... you'll have to have have some huge huevos and a wallet to match if you are going to push an engine in pain.
this might help you: Pelican Technical Article: Porsche Boxster / 996 Engine Teardown & Disassembly
yep it might mean a partial disassembly, but if you do go that route you may as well make it worthwhile.
__________________
986 x2 6sp
2x Range Rover Vogue 4.6
2004 MX5 Sport 6speed Strato Blue (wifelet)
2x Range Rover Classic & CSK
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09-04-2012, 06:32 AM
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#33
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DIY extremist
Join Date: Jul 2011
Location: Brooklyn
Posts: 348
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So, as you may've seen in another thread, I solved the squealing issue -- it was a loose plug. I wasn't following good diagnostic procedure and wound up spending a lot of unnecessary cash. Always check the small things first!
Thanks to everyone who responded with suggestions. The car is running great now with new clutch / coils / oil / IMSB!
__________________
"Betty" -- 2000 Boxster S, Triple Black, loaded except PSM (sold to a good home)
"Veronica" -- 2008 Boxster S, Arctic Silver on Blue
"Maleficent" -- 2007 Cayman S, Red and Black, TPC Turbo 3.6L 460 RWHP, H&R RSS Coilover / TPC stage 2 suspension
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09-04-2012, 06:46 AM
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#34
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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The only thing you can do in these situations is re-trace your steps and whether or not you think the issue is related to what you've done you have to check it anyway. Good job finding it..
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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09-04-2012, 07:37 AM
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#35
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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Good you found it, and a much less expensive fix than anticipated. The process of elimination works.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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