Sloane:
I was given to understand that all oil filters do this; If the
pressure drop across the media gets too high, the filter is bypassed to
permit oil to flow. This is a standard safety feature I thought. In the
stock filter the media is sealed against the block by a spring. If the
pressure gets too high, the media lifts off the block, permitting oil to
flow directly from the inlet to the outlet.
On canister filters, I *thought* there was a similar feature. In
addition, some filters have anti-drain back valves to keep the oil in
the block when the engine is off, permitting rapid oil circulation on
startup and reducing wear. Obviously, if you go the spin on route you
want an anti-drain back valve in the filter.
Now you have me wondering. Hmm. Time for a little research.
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of im sloane
Sent: January 09, 2006 7:14 AM
To: 6pack@autox.team.net
Subject: Re: oil cooler
hi guys,
<snip>
Anyway, he said "You don't want one of those." He went on to describe
how
the original filter canistor is designed so that, under high RPMs, the
filter will back-off, letting more oil flow thru when it's really
needed.
This is to say that the increased flow is more important than additional
oil
cleaning at this moment. He went on to say he had seen many cars with
the
spin on oil filter that had been damaged due to 'top end oil
starvation'.
Now, I've seen the aftermarket oil feeds to the top of the engine, which
sort of backed up his thoughts to me.
What do you think? Was he pretty much right, or full of gunk?
Sloane :)
'69-Six
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