Question regarding LN Engineering Bearing

Sorry if this is a repost, either I couldn't find it or I must have misread the search. Does the LN Engineering Bearing need to be replaced or serviced? I bought a car that already has it done. It's not the solution, just the retrofit. The shop that did this is a known reputable porsche shop, and they aren't aware of any service or replacement that it requires. However, I've been told by some on the forum that it does need replacement every 50k. Can someone verify this? I don't see anything about replacement on the LN engineering site. Thanks very much, much appreciated. BTW.. its a 3.6 rebore to 3.8 C4S that has the LN Engineering bearing.. not sure if single or double row.. also has RMS Seals done by the dealer as well.

I read some time ago that the replacement intervals are 50,000 miles for the single row and 75,000 miles for the double row LN bearings.

I had mine done 2 months ago, and was told the LN retrofit should be replaced in 50,000. Alan

If you have not yet done so, try contacting them directly: http://lnengineering.com/

Most of the cost of IMSB replacement is labor.Not a big deal if it coincides with clutch change timing .If you have an automatic....

http://imsretrofit.com/service-intervals/ Probably has the classic but you need to find out.

I am having my RMS done soon because of a small leak. I was told by the previous owner without paperwork that the IMS was done. As the IMS will be accessible at that time is it easy to tell if it is the original or an upgrade without removing it? It's a 2000 996 tip.

Since ay #1 the Classic single row has had a 50K mile recommended replacement. The dual row has had a 75K mile recommended replacement. The IMS Solution is permanent.

What are you saying Jake? If you change out the original IMSB to one of yours. You still recommend that the car goes back to you for another bearing after 50000 miles?

Quotes source post: 12219321

Here we only use the IMS Solution for single row cars. Single row cars do have the 50K service interval. What I am stating is the only permanent retrofit is the IMS Solution; if anything else is used the bearing would require scheduled service 50K miles later if its a single row, or at 75K miles if its a dual row. We have already re- retrofitted some of our earliest engines that started seeing retrofits 8 years ago. In these instances we replaced the single row with the IMS Solution. If I do this work, we carry out the re- retrofit labor for 1/2 price labor wise as long as the vehicle is still owned by our customer that paid for the first retrofit. The data we collect from these is very informative.

It's important to note there is a caveat to the 50k mileage if you wanna follow it to a "T".

Quotes source post: 12219417

Neat!

I am just looking on the LN engineering website.. sorry for another noob question.. but is it safe to assume that 97~2001cars use double row and all those 02~05 use single row? The paper work from my car doesn't state single or double row

Please take a look at our DIY Tech Article in regards to the bearing. We sell the LN bearing, but we also sell our own, which you can read about in the tech article and here . Kit is good for either Single or Dual Row IMS. I've highlighted below the difference between the bearings from the article below for you as a quick reference: LN Engineering Retrofit Kit The LN Engineering IMS Retrofit kit is also an easy-to-install upgrade kit that can be installed with the engine still in the car and provides almost bulletproof reliability to this critical component. This kit costs about $600 and is available online from PelicanParts.com. The upgrade kit incorporates a custom ceramic hybrid bearing (see Figure 5), featuring precision Japanese-made tool steel races and genuine USA-made Timken sintered silicon nitride ultra-low friction roller *****. This bearing, combined with a beefier center stud and a custom-machined housing, ensures that the IMS problems inherent in the stock design are mitigated. The engine can be upgraded during a routine clutch job and is fairly easy to install thanks to the installation tools designed by LN Engineering specifically for this task. Which Kit to Use? I designed the Pelican Parts replacement bearing kit in order to fill a gap within the do-it-yourself (DIY) market. This kit is designed to replace the factory bearing with a very similarly manufactured bearing (with an improved seal and updated center bolt). I recommend that the bearing be swapped out each time a clutch replacement is performed (30,000–45,000 miles). The outer seal is not removed on the kit, instead an improved seal is installed, which should offer longer life than the factory original. Replacement bearings, O-rings, and parts will be available for customers who have already performed the swap at least once and already have the tools, spacers, and the improved center bolt. The Pelican Parts kit uses the stock intermediate shaft bearing cover as a way to reduce the total cost of the kit, though we recommend if you have the older style single round gasket cover you replace this with the newer version from Porsche which is less likely leak. While we include both style of gaskets in the kit including a replacement gasket for the older style covers, Porsche no longer supports this part. The LN Engineering retrofit kit contains a stronger-than-stock center stud, a custom machined intermediate shaft end cover, and a special, custom-manufactured ceramic bearing, which is very expensive, but has much longer life under harsh conditions. The LN Engineering kit is considered to be the more robust kit and is designed primarily for shops that are installing the retrofit and need that extra guarantee for their customers. The extended-life ceramic bearing (see Figure 5) is only available at this time with the LN Engineering kit, and its inclusion is responsible for a large portion of the cost difference between the two kits. -Luccia

Thanks all. I made a mistake. I have the retrofit and not the bearing.