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YOUR RESEARCHHas anyone replaced the stock IMS with Stock?
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Recommend spin-on filter as open bearings will be more susceptible
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Suggestion
If you choose an open bearing, I would recommend the spin-on filter as open bearings will be more susceptible to debris in the engine oil.
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Replace by another oem dual, sucks we can't purchase it
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I have dual which I would like to replace by another OEM dual, sucks we can't purchase it from dealer.
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I am a bit amazed that Porsche, BMW, and other high end cars use cartridge filters if this is the case.
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I want to do the IMS while I am elbow deep in this Hog, but am already pretty deep in the wallet.
The factory 2 row has lasted 108k without signs of failure. Is there anything wrong with walking into the Porsche Dealer and buying a brand new dual row bearing?
Has anyone done this? Or is it just dumb?
No, the Pelican IMS kit is a single-row NSK bearing with an upgraded (stronger) center stud, along with a new o-ring and flange seal. The bearing is a rubber sealed unit. (It utilizes spacers to fit in the double-row bearing engines.)
It's basically an OEM replacement bearing, which Porsche doesn't offer. The single-row bearing I just removed from my 98k mile car was also an NSK unit from the factory, and BTW was in perfect condition. YMMV, of course...
Function-first is right.
IMO, no matter what you do, don't get a single row bearing, which has about half the load rating of your dual row.
I can think of at least a few choices: LN ceramic dual row, FVD sealed steel dual row and LN roller bearing. If you choose an open bearing, I would recommend the spin-on filter as open bearings will be more susceptible to debris in the engine oil.
Ok, I'll bite. It's better because it has no bypass valve (with the correct filter) so all the oil is filtered at all times. The stock filter has a spring loaded bypass valve at the bottom of the filter. If the valve opens (weak spring or thick oil at cold start up) all the crud at the bottom of the filter will be sent directly to the main bearings and cams, and the rest of the engine.
Thank you very much for that explanation. I have heard that before on other forums. I do know that all spin on filters do indeed have an oil bypass valve set to between 10-12 psi in case the filter gets clogged or something like that. I can only assume that the stock Porsche filter setup has a lower pressure relief in it or something that lets oil bypass at startup. I am a bit amazed that Porsche, BMW, and other high end cars use cartridge filters if this is the case. I of course am no expert on oil filters just a lowly A&P mechanic trying to learn more about this particular car.
Marc
What you said is true in general. In this case though, the filter is napa gold 1042, which happens to have no bypass valve.
http://wiki.hurstolds.org/NAPA_Gold_1042.htm
More info here
http://lnengineering.com/products/ot...ayman-911.html
Regardless of who makes the bearing (btw, I don't think LN manufacture any bearings themselves), First-function is correct about the important technical details.
See posts #6 and #9 by Pelican here:
http://forums.pelicanparts.com/boxst...ml#post6887538
SKF part number for the dual row bearing is:
SKF 3204A-2RS1T9/MT33
You will also need a suitable spirolock to hold the bearing in place once the old one has been extracted.
A Spirolox retaining ring is what you are looking for. I can't give you the measurements as I haven't pulled my IMS out yet. If you find out the measurements please post them up.
\Cheers.
