Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 08-23-2008, 07:39 PM   #1
Registered User
 
Join Date: May 2007
Location: California
Posts: 72
3.4L vs. 3.2L...

Just fishing and looking for alternatives.

Does the 3.4 have the same potential for an IMS dissaster as the 3.2s are starting to have? Is it a different core/case with fewer problems?

thanks,

kj
Boxster44 is offline   Reply With Quote
Old 08-24-2008, 11:47 AM   #2
Porscheectomy
 
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
2 things, first, IMS is not just starting on the 3.2, there seems to be a high "wave" of fear but this has been a problem (apparently steady), for several years.

Second, the 3.4 has the same potential for all failures as the 3.2 plus more of a propensity for the cylinder walls to D-crack.
blue2000s is offline   Reply With Quote
Old 08-24-2008, 02:47 PM   #3
Registered User
 
Join Date: Jan 2007
Location: Depends on the day of the week....
Posts: 1,400
The IMS issue can potentially affect all M96 series engines. The earlier, double bearing IMS motors are almost immune, but it seems that the 01-up 2.7, 3.2 and E-Gas 3.4 cars are the most vulnerable when they went to a single bearing IMS. The IMS was updated for the 3.6 and the 997/987 series motors and seems to be much better.

As to the other failures, early 2.5's had slipped cylinder sleeves and D-cracks. The 3.4 and 3.6 have thinner cylinder walls than the 3.2 (same bore spacing, larger bore= less material left for the liner) and have suffered D-cracks also. The 3.2 actually has the thickest liners of all the M96 motors, so hypothetically is the lease likely to suffer from this failure.

As far as where I'm at, if I'm putting any motor in my car, it will be a 3.6, both from a power standpoint, and that it seems Porsche ironed out many of the issues by then.

Patrick
Cloudsurfer is offline   Reply With Quote
Old 08-24-2008, 03:04 PM   #4
Porscheectomy
 
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
Quote:
Originally Posted by bmwm750
The earlier, double bearing IMS motors are almost immune, but it seems that the 01-up 2.7, 3.2 and E-Gas 3.4 cars are the most vulnerable when they went to a single bearing IMS. The IMS was updated for the 3.6 and the 997/987 series motors and seems to be much better.
This is pure speculation as there is no data on IMS failures.
blue2000s is offline   Reply With Quote
Old 08-24-2008, 09:39 PM   #5
Registered User
 
Join Date: Jan 2007
Location: Depends on the day of the week....
Posts: 1,400
Quote:
Originally Posted by blue2000s
This is pure speculation as there is no data on IMS failures.
It's all speculation since Porsche won't release numbers. I will say that on any of the boards I've never heard of an IMS failure in one of the dual bearing IMS engines. Likewise, I also have not heard of an IMS failure in a 3.6 or 3.8.

Patrick
Cloudsurfer is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 03:12 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page