Absolutely, there are a few Porsche specialists near me, so I'd definitely pay one for an inspection if I end up getting one next year. Are 911s more susceptible to this than Caymans?
From being a member on several Porsche forums the engines worse effected are:-
3.4l found in Cayman pre 2009 - Supposedly 5% chance of IMS failure and engine at somepoint in its life will score the bores.
3.8l is second most effect - IMS issues seemed to be reduced on 06 and later built cars where they got a revised IMS, they still score the bores though.
2.7l and 3.6l are less effected but can still suffer from both the above.
In short Hartech are the ones who have rebuilt the most engines and also found ways to prevent it, so far not one single Hartech re-built engine has failed, yet some people with Porsche replacement engines have even had the replacement let go. Also Autofarm and LN engineering very well regarded and singing from same sheet as Hartech.
Hartech have suggested taking the following action can help reduce scoring vastly:-
1. Change oil every 6000 miles
2. Use thicker grade oil 5W-40 or 10W-50
3. Lower temperature thermostat.
4. Warm car up properly
5. The crazy one, try not to use engine torque i.e. don't floor it sub 2500rpm
Above helps vastly reduce scoring, oil changes maybe IMS too.
The bores score because cooling/flow is not enough across the engine and particular cylinder 6 can not get enough coolant flow resulting in things get to hot resulting in scoring, for a far better explanation check google or Hartech website for more details where it is far better explained.
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