Not so sure about that, the inverted filters should have an anti drain-back
valve on the inlet, and the filter head should have an anti drain-back tube
going up the middle of the filter. If the valve is still functional (as it
should be) the filter will only drain as far as the top of the tube, leaving
most of the oil still in the filter to come out when you unscrew it.
Punching a hole in the bottom of a hanging filter *should* stop oil running
down the outside as you are trying to unscrew it.
PaulH.
----- Original Message -----
>> To avoid the big mess, before drianing the oil punch two holes in the top
> end of the filter to let air in, one near the center, and one close to the
> outer edge (inside and outside of the filter media. Then drian the oil
> and
> when finished put the plug back in. By that time all of the oil will have
> drained down from the filter, leaving only a tablespoon or so in the
> bottom
> that you can catch with a rag when you uncsrew the filter.
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