[ROVERNET - UK] Rover P6B - compression test query
Glen Wilson
rovercar at comcast.net
Thu Nov 30 14:44:21 GMT 2006
John Burkhard wrote:
> Hi Peter,
> Be sure to check the crankcase pressure and if John has the tools do a
> leak down test. For this test the engine should be cool and will take
> a few hours to do. Please do remember the old adage about the
> weakest. link.
It's also worth remembering that, in general, high crankcase pressures
in the Rover V8 may not be due to gases getting past the rings at all if
the cylinder heads are leaking into the valley area due to a bad seal at
the head gaskets. Remember that the cylinder head bolts must not be
torqued to the original settings that are in the workshop manual. If the
heads were off and someone installed them per the directions in the
workshop manual, they WILL leak into the valley and pressurize the
crankcase thereby forcing oil and oil vapors out.
Glen
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