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Сообщение от stanima
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INTRODUCTION.
The M96 and M97 engine that came out in 1997/8 in the Boxster as a 2.5 (and later as a 996 3.4, 986
2.7 and 3.2) and was developed into the 996 3.6, 997 3.6 and 997 3.8 (and the Cayman 2.7 and 3.4)
are all very similar – so much so that most engines could be fitted with a few different parts (or have
a few small changes made in a machine shop) and be turned into any of the other examples (i.e. they
are for most technical comments – identical).
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ты точно статью читал?
это 7я страница всего
там дальше этот тезис будет повторяться много раз
MORE RECENT ENGINE PROBLEMS AND SOLUTIONS (3.6, 3.8 & Cayman S 3.4 engines).
All of the original problems of cylinders migrating oval (increasing piston clearance, blow by and
higher piston to cylinder face temperatures) that existed before in small numbers in the Boxster
range and 3.4 996 engines (detailed in section 4) remain except that in the later engines with larger
intermediate shaft (IMS) bearings – there are far fewer IMS failures – but as if to make up for that
improvement - more piston damage and scored bores are occuring – at lower mileages than cracked
liners appeared before (and therefore preceding that eventual failure) as those relatively critical
piston to cylinder wall temperatures are slightly less well balanced and some are higher – reducing
the oil viscosity while trying to support bigger and more torquey later engines with higher outputs.