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		|  09-05-2019, 02:16 PM | #1 |  
	| There Is No Substitute. 
				 
				Join Date: May 2007 Location: West Coast 
					Posts: 3,253
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			Everyone else beat me to it, not worth doing the IMS on a pre-'00 986.  The chances of the dual row IMS failing are the same as any other car.  My take on engine failure, is that I would rather save the money and "if" my engine ever fails upgrade to a 3.2L.   
				__________________1999 Ocean Blue Metallic Boxster - blueboxster.com
 
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		|  09-05-2019, 03:58 PM | #2 |  
	| Registered User 
				 
				Join Date: Jul 2016 Location: SATX 
					Posts: 41
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					Originally Posted by rick3000  Everyone else beat me to it, not worth doing the IMS on a pre-'00 986.  The chances of the dual row IMS failing are the same as any other car.  My take on engine failure, is that I would rather save the money and "if" my engine ever fails upgrade to a 3.2L.   |  
That's what I did ....put in a 183k 3.2 three years ago, still running strong ....
		 
				__________________2001 Base with 2002 3.2 DIY swap 97 "short shift" tip "Joe Toth" aerodynamics, Z top, painted headlights.
 2001 Boxster 5 speed
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		|  09-05-2019, 06:46 PM | #3 |  
	| Registered User 
				 
				Join Date: Apr 2016 Location: SE Michigan 
					Posts: 496
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					Originally Posted by Turbodad  That's what I did ....put in a 183k 3.2 three years ago, still running strong .... |  
Lucky you   
I'm still waiting for 3.4 upgrade, driving hard my 2.5 with original IMSB daily, currently at 91K miles.
		 
				__________________1997 Boxster arctic silver/ red, XNE riveted mahogany/ leather steering wheel & 917-style wood shift knob, Ben’s short shifter, PSE, 996 TB, UDP, stereo/ center console delete, hardtop and speedster humps, daily driver rain or shine or snow!
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		|  09-06-2019, 04:22 AM | #4 |  
	| 1998 Boxster Silver/Red 
				 
				Join Date: Sep 2017 Location: 92262 
					Posts: 3,093
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					Originally Posted by rick3000  The chances of the dual row IMS failing are the same as any other car. |  
Everything I've read since I've owned my car says the dual-row is superior to the single.
 
Your source? Link?
 
Thank you.
		 
				__________________1998 Porsche Boxster
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		|  09-06-2019, 04:51 AM | #5 |  
	| Registered User 
				 
				Join Date: Oct 2015 Location: Melbourne, Australia 
					Posts: 243
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					Originally Posted by Starter986  Everything I've read since I've owned my car says the dual-row is superior to the single.
 
 
 Your source? Link?
 
 
 
 Thank you.
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He means any other non-M96 engine car.  ie agrees with you.
		 
				__________________2001 Boxster S, TipTronic in Seal Grey aka "The Imp"
 2001 TE50, ESS in (now) Grigio Titanio Matallizzato aka "The Golden child"
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		|  09-06-2019, 07:26 AM | #6 |  
	| 1998 Boxster Silver/Red 
				 
				Join Date: Sep 2017 Location: 92262 
					Posts: 3,093
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					Originally Posted by TrumpyAl  He means any other non-M96 engine car.  ie agrees with you. |  
Gotcha. Thanks!    
				__________________1998 Porsche Boxster
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		|  10-01-2019, 05:19 AM | #7 |  
	| Registered User 
				 
				Join Date: Apr 2013 Location: Lincolnshire, IL 
					Posts: 557
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			As a non-mechanic I have a question........ Do the newer Porsche engines still have the same design (ie: IMS bearing)?....or has it been eliminated in subsequent years?  If so, what year did they eliminate the problematic IMS bearing?
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		|  10-01-2019, 06:35 AM | #8 |  
	| 2003 S, Arctic Silver, M6 
				 
				Join Date: Oct 2014 Location: Winnipeg, MB, Canada 
					Posts: 1,346
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					Originally Posted by Rob175  As a non-mechanic I have a question........ Do the newer Porsche engines still have the same design (ie: IMS bearing)?....or has it been eliminated in subsequent years?  If so, what year did they eliminate the problematic IMS bearing? |  
Yes. . . .  2009 and later.
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		|  10-01-2019, 07:12 AM | #9 |  
	| Registered User 
				 
				Join Date: Jul 2017 Location: Tucson AZ 
					Posts: 536
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			There's a Jake Raby video about diagnosing the IMSB.  First sign of failure is a bunch of oil around the exterior  of the bearing.  I guess before deciding, I'd want to do an inspection.  Look at the back of the engine, look at the oil filter, and pull the oil pan down.
 Of course, replace the rear main seal.  Cheap, no brainer.  The IMSB is a relatively cheap thing to do, compared to replacing an engine.  Even if you would find a cheap replacement, doing the R&R is not cheap if you're paying someone $100 per hour to do it.
 
 But remember you're doing stuff to a 20+ year old car.  Of arguable value and collectability.
 
 Have a nice day!:troll:
 
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		|  10-01-2019, 07:21 AM | #10 |  
	| 2002 2.7 Boxster in green 
				 
				Join Date: Sep 2019 Location: Somerset UK 
					Posts: 102
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			From what I gather its not as common as its made out to be and as long as a car is serviced regular then no need. As the saying goes 'if it aint broke......'
 The only way i'd get mine done as a matter of precaution if I was having a clutch change would be if I had absolutely no history of the vehicle and it was at very little cost
 
				 Last edited by M9G; 10-01-2019 at 07:28 AM.
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