IMS cocerns - Rennlist - Porsche Discussion Forums

Notices
Boxster & Boxster S (986) Forum
Sponsored by:

IMS cocerns

Reply

Old 02-01-2018, 08:02 PM
  #1  
Stan35
New User
Thread Starter
 
Join Date: Feb 2018
Posts: 2
Default IMS cocerns

Just purchased a 2008 Boxster base with 23000 miles. Am just finding out about the bearing proble m. Does this affect this model year also? What should I be concerned with? All responses appreciated. Stan
Stan35 is offline  
Reply With Quote
Old 02-02-2018, 11:52 AM
  #2  
paulofto
User
 
paulofto's Avatar
 
Join Date: Oct 2014
Location: Winnipeg, Manitoba, Canada
Posts: 124
Default

The later 2005 to 2008 M97 engines have a substantially stronger and larger IMS bearing than the M96 of early 2005 and older models and have an extremely low failure rate. This bodes well for your car. The downside is the bearing can't be removed without pulling the engine and cracking the case. The earlier M96 have a higher failure rate but the bearing can be replaced with the engine in the car. In 2009 Porsche went with a 100% brand new engine design, the 9A1 and the whole IMS bearing issue was eliminated.

I'm not an expert but everything I've read says enjoy your car, get a magnetic drain plug, change the oil and filter every 5K miles, inspect the filter and plug for ferrous material, but first and foremost drive, drive, drive.
paulofto is online now  
Reply With Quote
Old 02-02-2018, 01:12 PM
  #3  
Charles Navarro
Addict
Rennlist Member
 
Charles Navarro's Avatar
 
Join Date: Mar 2002
Location: Momence, IL
Posts: 664
Default

The incidence of failure with a 2006-2008 M96 or M97 Engine as found in the Boxster, Cayman, and 911 that have the larger (but non-serviceable) IMS is highly unlikely. We would estimate about a 1% failure rate.

When you have your clutch replaced, it's best to have the grease seal removed off the original bearing to allow engine oil to better lubricate it. At that time, you can reseal the IMS flange and have the rear main seal replaced as well.

There is a black plastic seal on the front of the bearing - you would use a dental pick or something similar to pop the seal out of it's groove. Just be sure not to loose it in the engine when you do remove it. We don't have a how-to for this, but I found a short video on YouTube that shows seal removal on a ball bearing:


The larger bearing found in MY06-08 engines has the same load capacity as the early dual row, which have proven to be the most reliable of the factory bearings. I wouldn't worry too much about it after you pull the grease seal. There is no need for a direct oil feed for the factory ims bearing as the bearing will be submerged in engine oil once you have the grease seal removed.
Charles Navarro is offline  
Reply With Quote
Old 02-07-2018, 05:55 PM
  #4  
Stan35
New User
Thread Starter
 
Join Date: Feb 2018
Posts: 2
Default IMS bearing concerns

Charles- Thanks for the advice. I will follow your directions when the time comes. Stan.
Stan35 is offline  
Reply With Quote
Old 02-16-2018, 02:52 AM
  #5  
altonj
Addict
Rennlist Member
 
altonj's Avatar
 
Join Date: Mar 2005
Location: West Coast Canada
Posts: 654
Default

What Charles said.

The motor, if it fails, will likely fail from a different cause.

Cheers
altonj is offline  
Reply With Quote
Old 02-23-2018, 11:51 AM
  #6  
Bill in VA
User
 
Join Date: Feb 2018
Location: Northern Virginia
Posts: 13
Default

Early Boxsters up to 1999 were relatively OK. Design change for IMS 2000-2004 (I think) created a weak link. Post 2004 you should be OK.
Bill in VA is offline  
Reply With Quote

Thread Tools
Search this Thread
Quick Reply: IMS cocerns


Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: