Quote Originally Posted by arveetek View Post
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First, I made a bypass hose to make a circuit on the oil cooler ports:






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Casey
I've spoken to a guy here recently who called to talk about why his 6.5 was losing oil pressure after warming up. It would be fine, then he'd lose almost all oil pressure... We talked about the possibilities I knew about on that first call.
On the second call I learned sorta accidentally that he had put plugs into the oil cooler line ports on the block. His original lines were leaking and he "didn't think they were necessary". I told him that if the oil cooler line circuit was to become blocked, it'll force a bypass valve to open. I continued by saying that I didn't know what the ultimate consequences would be, but an odd response in oil pressure would be expected...

Like you, I made a looped bypass when I primed the oiling system on Sarah's 6.5 while it was on the engine stand.
Jim