Looks like the 06 larger IMS still dident fix the problem!! - 986 Forum - The Community for Porsche Boxster & Cayman Owners

moresquirt · 03-29-2014, 11:45 AM

Was in Canadiantire yesterday and noticed a 911 (06 S) up on the lift and a skid sitting beside it with a motor shrink wrapped,so being nosey and knowing one off the mechanics personally,i preceded to find out what was going on.Apparently it was the store owners car and the reason the motor was removed was because the IMS bearing had failed and a new Porsche motor was getting installed .price off motor was $20,000 approx.Not sure what happened to the original motor but the new one was totally complete with clutch,flywheel,water pump ect already attached,so not sure if thats the way they come or maybe this was a rebuilt engine.I was kinda bummed that the newer design bearing had failed (mileage was 60000 kilometers) .Now im really nervous about my 06 Boxster.
I have no info on the car if it was tracked or daily driver,oil type ect.Will find out more another day from mechanic and report.Not sure what engine size either.Again will find out.FYI

Mark_T · 03-29-2014, 02:39 PM

That's funny, not that the engine detonated, but that the only way a Porsche would ever see the inside of a Canadian Tire service bay is if it belonged to the owner. Hell, I wouldn't take mine there if I was the owner.

If it were possible for a car to look embarrassed, this would be the time.

The Radium King · 03-29-2014, 03:30 PM

well, I think that any engine failure in a late model Porsche gets diagnosed as ims failure. perhaps especially at can tire. the 997.1 engines got their additional displacement by stroking the engine. with the longer stroke and the 'cost effective' cyl lining material used, folks are finding that the pistons are wobbling and scoring the cyls. take it to the extreme and you get a failure that could look like an ims failure.

mikefocke · 03-29-2014, 04:44 PM

I'd also ask how did they know the IMS was the cause. Not saying there can't be a failure but we don't see many reports on the forums.

Reebuck1 · 03-29-2014, 04:47 PM

Go by the RABY new bearing...it is bullet proof....no ball bearings.

AP328 · 03-29-2014, 10:21 PM

The IMS problem was not solved until 2009, although the incidence of failure is lower.

DennisAN · 03-29-2014, 11:40 PM

On another car forum Canadian members were talking about some place they called "Crappy Tire". Turns out to be local slang for Canadian Tire.

moresquirt · 03-30-2014, 04:54 AM

Just want to confirm that,the owner off the car and off canadiantire is a very mechanically smart guy,the guys at ctc just help drop the motor and install the new or rebuilt motor that was complete so besides hooking up a few hoses and wire connectors they really werent involved.But yes seeing a Porsche 911 up on the hoist at a canadian tire was a shocker when i saw it first.Apparenty the owner has had previous issues with the motor and is selling when put back together for around $40 grand cdn.Its a beautiful car and looks mint,red exterior .Hes just fed up with the problems with it.we will see.I realize this is a Boxster site but only reason i added this post was the IMS bearing issue relation.
Can someone confirm if replacement motors from Porsche come complete with water pump,clutch,flywheel ect installed.

Jake Raby · 03-30-2014, 05:22 AM

We're not seeing very many failures from the 067 and later IMS Bearings at all. It seems that the only time they do fail is on the track, and the reason for that is due to the bearing diameter and surface speeds.

Porsche made the bearing larger not just to increase the size of the balls and races to make a stronger bearing, but also because the larger diameter bearing had a greater surface speed and reduced loads at lower engine speeds. This is why M96 style IMSBs don't fail in high numbers on the track, but do on the street and the problem has reversed for the M97 style IMSB.

Its been two years since we had a single failure call on the M97 style IMSB that occurred on the street. We've only seen two M97 style IMSBs fail on the track in the same period of time.

Keep the oil changed every 5K/ 6 months and use something other than M1 and just drive. Nothing else is necessary with the M97 IMSB and thats been proven to us for going on 8 years now.

Quote:

I'd also ask how did they know the IMS was the cause. Not saying there can't be a failure but we don't see many reports on the forums.

True, because the IMSB is the easy thing for diagnosticians to blame everything on when they are not proficient with the internals and characteristics of these engines.

With the M97 engine I am more concerned with rod bolts and timing chains than the IMSB.

The Radium King · 03-30-2014, 10:08 AM

well too bad; i have an excellent engine in need of a car and would love to find a late 996 or 997.1 (or cayman) with a blown engine ...

Jake Raby · 03-30-2014, 12:50 PM

Quote:

Originally Posted by The Radium King

well too bad; i have an excellent engine in need of a car and would love to find a late 996 or 997.1 (or cayman) with a blown engine ...

I have a great 06 Cayman S that needs an engine to sell.. I bought it broken (lost a rod bolt) and don't have time to fix it.

moresquirt · 03-30-2014, 04:00 PM

just got more scoop from one of the mechanics (not the mechanic working on the car)
Apparently the motor on the shrink wrapped skid was rebuilt ,and yes it definately was the IMSbearing that caused or lead to the blown motor,was wrong on the cost to rebuild,it was $10000 and was apparently done in the US (not canada) The owner does track the car and basically runs the living **************** out off it on a regular basis.Sounds like Jake nailed it with the tracked cars with larger IMSB having premature bearing failure.Daily drivers seem to be holding up better which mine is and will always be as long as i own it.The mechanic that is doing the install is apparently a Porsche nut from Ottawa and has worked on many.The install will be completed tomorrow,i may pop by and have a boo.
I am fascinated with this kind off stuff and up till now have only read about thease issues so seeing and speaking to the guy that experienced the issue may give me some insight as to the possible cause,although Jake with his extreme knowledge already pretty much confirmed everything.I want to find out oil type ,viscosity,mileage changes,motor size,ect.
and curious who did the rebuild.

Jake Raby · 03-30-2014, 06:33 PM

If someone "rebuilt" it for 10K, its not very comprehensive. The parts bill should be 4K more than that at minimum.

Glad to see that I nailed this one... We simply do not see the failures from street cars with the M97 IMSB. It took a while to figure out that all the M97s we've experienced that failed were track cars.