Hmmm......

I'm pretty sure this was the Rotella I used:
(Shell Tech Sheet pdf): http://tinyurl.com/ofwcbtr
I read elsewhere it may contain 1325 ppm zinc

I'll try the test. Thanks. I know that engine oil level
will show higher when engine up to temp
but I'm seeing a marked difference in level between
cold and warm engine. Like maybe 1/2 a litre?
I understand that the lifter issue was simply a coincidence.

Jack: (Mr. Squirrel or Mudd or ?)
Used that oil as I'd heard it was quite robust. Viscosity chosen in anticipation
of hotter weather.

Neil.

On 3/1/15, Dennis Haynes <d23haynes57@hotmail.com> wrote:
> The oil filter will not hold pressure, all the check does is prevent the can
> and galleys from draining. You have a lifter that is bleeding down and
> clacking for few seconds is perfectly acceptable operation. What Vanagons
> like to do is have lifter that will clack away for minutes or even miles.
> These are likely lifter with a ball check sticking in its seat so that the
> oil does not travel through and pump the lifter up.
> If you want to test the anti-drain valve on the filter here is a simple
> test. Engine real cold, start it, as soon as the light does out turn the
> engine off and ten turn the ignition on without starting it. If there is
> delay for the oil pressure light to turn on the check in the filter is
> working. If you have an oil pressure gauge you can see the pressure drop
> off. Again this will only work on the cold engine.
>
> Depending on the Diesel oil used saved up for a new cat and O2 sensor.
> Although most of the new Diesel oils now are low zinc formulas for the
> newfangled diesel emissions stuff.
>
> Dennis

Neil n

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