Planet-9 Porsche Forum banner
1 - 20 of 30 Posts

·
Registered
Joined
·
13 Posts
Discussion Starter · #1 ·
Hi guys, new to this forum.

Purchased my first Porsche yesterday! 2006 (56 reg) Cayman S in black! Got a question you may be able to help me with. I am having the IMS bearing replaced straight away to avoid any upset or huge future bills. I have been quoted £1800 inc. VAT, for the job to be done at a nearby Porsche Specialist. Does this price sound fair as would I be right in saying the engine needs a complete strip down to change the bearing on the 2006 models as it is a revised bearing anyway?

I have also ordered the lower temperature thermostat for the car and will be having that fitted at the same time. Car has 61,000 miles and is absolutely stunning. Am very happy with the purchase!

Thanks guys, Tommy.
 

·
Registered
Joined
·
175 Posts
IMS failures in your '06 Cayman with the M97 engine is very rare but if replacing it gives you peace of mind and you have the money to spare then go for it. Converting to dollars the price seems fair. I own an '08 base Cayman and I am not replacing the bearing until/unless I get some kind of indication that it is or may be failing. I currently have just over 28k miles on it and it doesn't worry me based on my research.
 

·
Registered
Joined
·
1,852 Posts
Based on Wheeler Dealer conversion rates (dollars are 50% more), $2700 is a very fair price. The guy who perfected the LN bearing frequents the Boxster forum (986forum.com). Rule of thumb on a 986 replacement was $2K, which included clutch & bearing. I asked Jake a few yrs ago what an M97 replacement would cost and he said $4K.

If your mechanic is going thru the effort to tear your engine completely apart, I would suggest having him replace the rod bolts with some stronger units. This was a weak pt in the M97 (more so than IMS). Slippery slope...

Or you could skip the whole process and fund a yr of DEs with that money. Would be more fun.

Good luck.
 
  • Like
Reactions: racergreg

·
Premium Member
Joined
·
1,837 Posts
"Automatically" changing the IMS in a M97 motor seems crazy to me. There are so many other things that can, and will, go wrong with a 987.1 Cayman before you even have to worry about the IMS. Has the water pump been replaced, what about the thermostat? The AOS? These are far more likely to be "problems" when you buy a used Cayman than something that might have gone bad in two cars, as far as we know. I'm with Budman on this one.
 

·
Registered
Joined
·
13 Posts
Discussion Starter · #7 ·
If the IMS fails I am not willing to spend more than half the vehicles value on a rebuild. clutch is being replaced and same time as well as a full inspection on RMS. Every Porsche specialist I have spoken too has witnessed customers with M97 IMS failures and I am not willing to risk. You guys are probably right but that small chance is enough to worry me enough to not enjoy the car :/ Lower temperature thermostat is too reduce the temperature around the bores preventing bore scoring.
 

·
Registered
Joined
·
1,388 Posts
Lower temperature thermostat is too reduce the temperature around the bores preventing bore scoring.
An LT thermostat won't prevent bore scoring, but more likely to play a small part in minimising the risk. Regular oil changes, good quality oil and driving style all contribute to help in some way.
 

·
Registered
Joined
·
2,363 Posts
"Every Porsche specialist I have spoken too has witnessed customers with M97 IMS failures and I am not willing to risk."

That just isn't the case here in the US. Most specialists here, including some VERY knowlegable/professional Cayman race car builders say the exact opposite of what you are hearing. A few that might agree with you in all probability are trying to sell upgrades by basically being dishonest. On this blog alone, which probably has the largest participation rate of any and all other Cayman/Boxster blogs combined, there have only been reported/proven IMS failures in the single digits. And, WAY less than the predicted estimate of 1%. But it's your money. :cheers:
 

·
Registered
Joined
·
13 Posts
Discussion Starter · #11 ·
really appreciate you guys honesty! maybe ill have to rethink my decision! im quite a worrier. I have ordered the lower temp thermostat to try and prevent bore scoring too. I just know my luck mate.
 

·
Registered
Joined
·
1,321 Posts
Changing out the IMS seems a little silly.

How about just adding an oil feeder? I have always wondered whether the oil feeders are a better/more practical solution than to swap to LN IMS
 

·
Registered
Joined
·
1,388 Posts
really appreciate you guys honesty! maybe ill have to rethink my decision! im quite a worrier. I have ordered the lower temp thermostat to try and prevent bore scoring too. I just know my luck mate.
Is the LT thermostat a Hartech one? If so ask them about IMS failure rates on 987's - nowhere near as high as you have been led to believe.
 

·
Premium Member
Joined
·
805 Posts
Is the LT thermostat a Hartech one? If so ask them about IMS failure rates on 987's - nowhere near as high as you have been led to believe.
When I was looking for my CPO car, I was discussing this issue with my rep at the dealership and he told me that they had never seen a 987.1 with an IMS bearing failure. I still held out for a 987.2 though. My main reason was the oiling issues in track usage though.
 

·
Registered
Joined
·
46 Posts
Hello.

I have a 2007 Cayman S and I was concerned about the IMS bearing as well. I installed the DOF (direct oil feed) to keep the bearing from destroying itself due to lack of lubricstion

When I pulled the seal off the bearing I saw there was no grease left - it had been washed away by engine oil. The only lubrication the bearing was receiving was from whatever oil had managed to get past the seal. Pretty amazing if you think about it - this bearing working well with only minimal lubrication.

If these bearings can run with minimal lubricstion I would expect thrm to run much longer with a steady supply of clean and cooled engine oil.

I no longer worry about the IMS bearing because I feel the oil feed will keep it well lubricated - which to me is why these bearings fail.

Hooe this helps.
 

·
Registered
Joined
·
25 Posts
Tommy i don't know why you are doing this, but i was under the impression replacing the bearing properly requires a complete strip down and i can't believe for £1800 this is being done. The indy that works on my cayman in surrey told me that hartech receive a number of 987 engines to (re)repair where 'someone' tries to replace the bearing externally aka on the cheap. I am not an expert on this but would speak to hartech to verify what you are being told.
 

·
Premium Member
Joined
·
830 Posts
Tommy i don't know why you are doing this, but i was under the impression replacing the bearing properly requires a complete strip down and i can't believe for £1800 this is being done. ...
Agree. Took my 2006 CS to an indy, they mentioned replacing the IMS until I reminded them it was not like the previous Boxster, engine has to be pulled. Very expensive and not indicated since very low failure rate (at least assuming car not tracked ). I agree that oil /filter change at 5K miles (not 5K Km) would be reasonable and give you peace of mind.
 

·
Registered
Joined
·
260 Posts
Are you planning on tracking the car? If so, on race compound tires or on street tires? In the USA, on street compound tires the ims bearing appears ok for at 100k miles with reasonable maintenance including oil changes (after that maybe not so good). Evidence supporting this point of view: a class action law suit in the US that argues even for 986 boxster the owner is due compensation if the engine doesn't survive 100k miles plus anecdotes from those who have tracked their 987 cars that street tire g loadings aren't going to blow up the engine, but with R compound tires YMMV
 

·
Registered
Joined
·
92 Posts
Hi guys, new to this forum.

Purchased my first Porsche yesterday! 2006 (56 reg) Cayman S in black! Got a question you may be able to help me with. I am having the IMS bearing replaced straight away to avoid any upset or huge future bills. I have been quoted £1800 inc. VAT, for the job to be done at a nearby Porsche Specialist. Does this price sound fair as would I be right in saying the engine needs a complete strip down to change the bearing on the 2006 models as it is a revised bearing anyway?

I have also ordered the lower temperature thermostat for the car and will be having that fitted at the same time. Car has 61,000 miles and is absolutely stunning. Am very happy with the purchase!

Thanks guys, Tommy.
Assuming your indy is aware you have a Cayman, I would suggest you need a new indy. £1,800 inc is almost definitely not enough given the strip-down required, so the quote is:

A. Almost definitely for an M96 engine with an accessible bearing and so
B. Is a bit of a rip off and
C. It's worrying they don't know your bearing is essentially inaccessible, they ought to be experts!

Anyway, there are reasons to be concerned about your engine (bore scoring mainly), but IMS failure isn't one of them. So don't sweat it.
 

·
Registered
Joined
·
13 Posts
Discussion Starter · #20 ·
hi guys, thanks again for your time. I believe you are correct and the Indy is quoting the M96 engine bearing change. Maybe I'll go for this direct oil feed? How much is this approximately? won't the bearing be spinning at such a rate it won't allow oil in? sorry for all the questions, kinda feel like I've brought a ticking time bomb.
 
1 - 20 of 30 Posts
Top