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IMS Pre-Qualification

How do I know my engine is a good candidate for IMS bearing replacement?


The following eleven step IMS Retrofit Pre- Qualification procedure was developed by Jake Raby at Flat 6 Innovations. During the initial development of the IMS Retrofit Procedure and components, some items of concern were noted from the very beginning. Over the years, these procedures have been updated to address these, thus increasing the effectiveness of the IMS Retrofit procedure. This procedure has been employed at Flat 6 Innovations since the very first IMS Retrofit was performed. To date it has resulted in a 100% success rate for the Flat 6 Innovations Preventative Service program. Having performed the very first IMS Retrofit and after performing more IMS Retrofits than any other facility, a perfect record has been maintained by Flat 6 Innovations by employing these procedures verbatim. Today, roughly 20% of all engines that are inspected will fail this pre- qualification, and will require repairs to be made prior to the IMS Retrofit being performed. The biggest mistake that can be made is assuming that every vehicle is healthy enough to have the IMS Retrofit performed. The second biggest mistake that can be made is not taking the pre-qualification procedure seriously. Please, pay attention to each and every engine, and realize that not every engine is a viable candidate for an IMS Retrofit.

 

 

How do I properly bore scope my cylinders to check for bore scoring prior to changing my IMS bearing?

As part of the pre-qualification procedure, you must bore scope your cylinders. Changing the IMS bearing on an engine with existing bore scoring will compromise the replacement IMS bearing. Bore scoring will greatly shorten the life of the engine and will require overhaul, so it is not advisable to change the IMS bearing in an engine that is already in the process of failing.

Shops not familiar with the M96 engine will often bore scope cylinders through the spark plug opening. Unfortunately, this is not the correct procedure. Bore scoring in the M96 and M97 engine requires scoping cylinders from the sump. Where other shops fall short, Jake Raby shows you where scoring starts by using a technique that he developed at Flat 6 Innovations. The process will confirm the severity of cylinder bore scoring.

 


How do I carry out the pre-qualification ECU interrogation?

The Durametic is one of the best tools for evaluating the health of a Porsche 986, 996, or 997 engine. Jake Raby explains how to quickly go through a few important steps with this diagnostic tool to reveal the vital signs of a M96 or M97 based Porsche 911.

 



How do I inspect the dual mass flywheel to determine if it needs to be replaced?

Unlike a single mass flywheel, the factory dual mass flywheel cannot be resurfaced or reconditioned because of its dual mass. The dual mass provides critical dampening for harmonics and must be retained. A single mass flywheel is not recommended. Besides the clutch surface, spring back of the dual mass must be checked to ensure it is within factory specifications. In doubt, replace with a new Genuine Porsche or OEM LuK dual mass flywheel along with new flywheel bolts.

 



How do I replace the rear main seal?

When replacing your IMS bearing, the rear mail seal should always be replaced with a Genuine Porsche PTFE rear main seal (RMS). If the RMS is leaking, the RMS go-no-go tool should be used before fitting a new seal. Under no circumstances should any product claiming to add a rear main seal bearing or any seal other than a Genuine Porsche seal be used. A leaky rear main seal is not caused by the weight of the dual mass flywheel, but rather from mismachining from the factory or if the engine has not been previously fitted with a Genuine Porsche PTFE rear main seal.

 


The following tools and products are used in carrying out the IMS Retrofit and IMS Solution Pre-Qualification procedure. Installations that are carried out with pre-qualification can result in less than exceptional results, so it is very important that all steps are followed.



Where can I find instructions for replacing the IMS bearing with the IMS Retrofit or IMS Solution?

Instructions can be found in our Download Library.

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