Dan,
Since this thread began, I had called several Auto parts stores seeking data on
all those referenced filters, so I could rationalize the who affair. Here are
my
thoughts:
1. The TR6 filter mounts downward, making the anti drain-back valve
unnecessary.
2. Apparantly all the oil filters have bypass valves built in. The only
difference appears to be the pressure at which that valve actuates. And I'm
with
you there Pal. Any properly maintained engine should never require a bypass
valve, because it should never become clogged.
3. After checking several different types of filters from various sources, they
all appear to be about equal. (FRAM, Motorcraft, WIX and carcraft) BTW
carcraft
filters are made by WIX.
Now that is about as clear as the oil in my Spit. (Actually the oil that "was"
in
my Spit and is now on my shop floor.)
Joe Curry
P.S. My scanner is supposed to be here tomorrow. If I can get it running, I'll
send those "axe" shots I promised.
DANMAS wrote:
> One last question about filters and bypass valves, and then I'll shut up -- I
> promise!
>
> I am not trying to say that anyone SHOULDN'T use a filter with a bypass valve,
> I am only asking if it is NECESSARY to use one.
>
> I understand that the purpose of the bypass is to allow unfiltered oil to
> reach the block if the filter becomes clogged, and I understand that
> unfiltered oil is better than no oil at all.
>
> My question is this: If I maintain my car well, changing oil and filter on a
> regular basis, no less often than, say every 5000 miles, is there any
> reasonable probability that the filter will become clogged to the point that
> the bypass is needed between oil changes? Is it possible that sludge will
> build up on the interior of the block over time, and then be dislodged - from
> hitting a pothole, or something like that - such that it will be sucked into
> the filter, clogging it? Or is there some other means I just don't understand
> to clog the filter, if changed regularly?
>
> Right now, I use a PH3600, and I have never worried about whether or not it
> had a bypass, because I never thought it to be important, as I change the oil
> and filter about every 1500 miles or so.
>
> If it doesn't involve electrons, I get confused easily!
>
> Dan Masters,
> Alcoa, TN
>
> '71 TR6---------3000mile/year driver, fully restored
> '71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion - see:
> http://www.sky.net/~boballen/mg/Masters/
> '74 MGBGT---3000mile/year driver, original condition, slated for a V8 soon!
> '68 MGBGT---organ donor for the '74
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