Einfach zur Information aus dem Bulletin 356 des RREC:
CYLINDER HEAD GASKETS 07V103147 (formerly UT12890PD) are currently unavailable
from RRBSA members. This gasket is applicable to all V8 models from 1960 to 2002.
Since March 2019 our members have become aware that, following the replacement
of the cylinder head gaskets, some engines have leaked externally and/or internally. We
believe that it is the head gasket itself that is the cause of these failures.
As part of our investigations we have been measuring batches of gaskets and
recording the dimensions. This has led us to conclude that the most likely cause of the
gasket failure is that the difference in height between the steel firing ring (the section
around the top of the cylinder liner) and the composite material (that forms the
principal part of the gasket) exceeds acceptable tolerances. Allied to this is a suspicion
that the red silicone beading has not been correctly applied to the gasket.
Regardless of who has been supplying these gaskets, they have all been
manufactured by the same company. Bentley Motors are currently in discussions with
the manufacturer to resolve this issue.
All our members have regrettably removed these gaskets from sale as they are
unable to offer any warranty on them. However, some franchised dealers continue to
supply the gaskets. If you purchase a gasket from such a company we strongly advise
that you request a written guarantee to explain what warranty they are offering.
The RRBSA are communicating with the Aftermarket team at Bentley Motors to
resolve this matter as quickly as possible, whilst also investigating the production of an
alternative gasket.
If you have further questions or need more information, please contact your nearest
RRBSA member
Gruß - Udo