The actual intermediate shaft itself, however, is not the root of the now well-known and infamous 996 and 997 IMS-related “engine problems.” The basic design and use of an intermediate shaft was not a new development in the then High tech and new water-cooled “M96” engine developed for the 996. With those gears, the function of the intermediate shaft is to use the mechanical rotation of the engine’s crankshaft to drive the camshafts on either side of the engine. The intermediate shaft is a geared shaft that runs through and extends out from the front and rear of the engine. Without getting heavy and to technical, we’ll go over what an IMS bearing is and what its function is.įirst, “IMS” stands for inter mediate shaft. If you read the words “Disastrous catastrophic engine failure” above, your first thought might have been to wonder exactly how such a relatively small component has the potential to DESTROY an entire engine, instantaneously, and almost with no warning. Here is everything you need to know about the Porsche IMS bearing issue.įirst things first, a little basic information is in warranted before we get down to the bone.
#1999 PORSCHE 911 ENGINE PROBLEMS HOW TO#
You want to be informed and you want to know how to protect your Porsche from premature disastrous engine failure. “What causes IMS bearing failure?” “How can you tell if your Porsche IMS bearing needs to be replaced?” “Can IMS bearing failure be prevented?” “What is the Porsche IMS bearing failure rate?” We’re here to help you understand the problem just a little more. Many readers are still left wondering about the real answers to their questions. There are many search results on the internet regarding this subject, and many either have conflicting information or just seem to confuse the topic even more. However, if you own or are considering purchasing a 996 or 997 generation Porsche 911 (excluding Turbo models), or a 986 or 987 generation Porsche Boxster, and aren’t already aware of the “IMS bearing upgrade” then we urge you to keep reading because the information you’ll find here could save you TONS of money. By now, most Porsche 911 owners have heard about the Porsche IMS bearing issues that have plagued these engines for years. Additional information about our dual row IMS bearing upgrades can be found on the IMS Retrofit or IMS Solution website.The Porsche IMS Bearing – BIG Problem: FACTS TO KNOWīy Mike Emery – Perfection Auto Works, Tucson, AZĭo you have questions about the Troubling Porsche IMS bearing? You’re not alone. LN Engineering's intermediate shaft (IMS) bearing FAQ has everything you need to know about your Porsche M96 engine's dual row IMS bearing. Where can I learn more about the Dual Row IMS Bearing in my Porsche Boxster or 911 engine? Regardless of which LN IMS bearing replacement you choose, our ims bearing solutions have been used and trusted worldwide since 2008.
The IMS Solution provides a permanent fix for the IMS bearing problem by backdating the M96's intermediate shaft bearing to an oil pressure fed plain bearing like an aircooled Porsche 911 Mezger engine. The IMS Retrofit replaces the original sealed dual row bearing with an open ceramic hybrid ball bearing with a service interval of 6 years or 75,000 miles (whichever comes first).
IMS bearing issues don't decrease with age and mileage, so it is just a matter of time before your original ims bearing fails requiring your M96 engine to be rebuilt or replaced. LN Engineering's IMS Retrofit and IMS Solution intermediate shaft bearing upgrades replace the problematic sealed ball bearing installed by the factory that can fail catastrophically. The dual row bearing might have double the load capacity, but it is still a wear item and needs to be changed out. IMS Retrofit and IMS Solution intermediate shaft bearing upgrades for Porsche Boxster 986 and Porsche 911 996 Models with original dual row bearingĪlthough the original 5204 dual row IMS bearing used in 1997 through 1999 Porsche Boxster and 911 engines and some 2000 to 2001 models is less failure prone than the later single row IMS bearing, these bearings can and do fail and need to be replaced as part of regular scheduled maintenance. RND RS Cylindrical Roller IMS Bearing Replacement Retrofit Kit.
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