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#67725 12/16/11 11:54 AM
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sodell Offline OP
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I am sure this subject has been discussed before but being relatively new to this site I can't find any topics on it.
For a Sunday driver 1979 C-10 pickup with a new, mild cam 292 going in it that will never be raced or driven very hard; is it advisable to block the oil bypass? I like the idea of always having the oil filtered, I always let it warm up before driving, change oil and do maintenance way too much on all my cars and bikes and will be running dual HP1 size remote oil filters. These filters can be had in versions that have bypass valves built into them (K&N 3001) or not. Also has anyone ever plugged the bypass valve by an epoxy method? Any opinions on this would be appreciated.

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On a cold start-up (cold air, water, oil) the bypass is what prevents the filter from being blown right off the engine. If it doesn't, the next weakest link is probably the core plugs for the oil galleries. The pump relief valve is far too small to handle the excess pressure.

If you do this, I suggest 5W20 or a multi-grade with a very low "winter" viscosity.

To insure all the oil is filtered, you need a really big filter or 2 in parallel.

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I plug all of the by-pass passages in the engines I have built including SBC's.

IIRC, for the 250 inlines I just needed a tap for the bypass hole & installed a NPT plug.

I do not remember having to drill the hole, just removed the by-pass assy, then tapped it.

MBHD


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sodell Offline OP
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Yeah, that is what I'm going to run, two large filters on a dual mount.


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