POST 1 / ORIGINAL POSTEROriginal post
Is this version of the 3.4 as vulnerable to earlier models with regard to the common issues of bore scoring and am I right in thinking the IMS is done away with by 2010?
PistonHeadsOriginal source
2010 3.4 PDK Boxster - Page 1 - Boxster/Cayman - PistonHeads UK
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YOUR RESEARCH2010 3.4 PDK Boxster - Page 1 - Boxster/Cayman - PistonHeads UK
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POST 2Original post
hartech said: We've seen bore scoring at under 15K and not seen it on over 100K (although piston coatings are getting well worn by then). It seems dependent on several factors one of which is the piston temperature reached affecting the piston coating bonding strength, the load between the piston and cylinder bore, the ambient temperature and the rate of heat soak caused when stopping for a while after a spirited drive. Added to that we think there is a variability of the distribution and bonding strength of the silicon in the cylinder walls. It is clear that if all the drivers from new never thrashed the car - always warmed it up before thrashing it, never exceeded UK National speed limits, didn't give the car full throttle while accelerating (especially in a tiptronic where slipping into first helps before setting off fast), whatever the quality and distribution of the silicon in their Lokasil - their engine would last longer. But these cars should be able to be driven fast and so how it was driven and a random quality element may all make predictions very hard. Some new owners drive very modestly and so their cars have a higher proportion that will last longer but some also can afford to treat a new expensive sports car with contempt and cause a lot of premature deterioration. You can help by lowering the running temperature with a low temperature thermostat, third radiator (as long as it also has a control valve or thermostat), thicker oil viscosity as the mileage increases etc but there is still unfortunately a random element that can bite any owner at any time - but numbers failing are still very low and there are warranties and maintenance systems that could reduce the cost if it occurred to you. Good luck, Baz
POST 3Original post
Full thread here, http://www.pistonheads.com/gassing/topic.asp?h=0&a...
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