Mike Schilderink Posted March 24, 2021 Share Posted March 24, 2021 I recently rebuilt my E6 350 after a cam lobe/lifter failure. Truck has 750k. I decided to pull heads and pan to inspect, and I decided on an inframe. PAI Kit; Reman heads, reman turbo, reman oil pump, new rods and mains, new lifter, new camshaft, original cam bearings, original piston head bearings. Truck had 30psi idle and 60psi @1600 operating temp. Truck now has 18psi idle and 35psi @1600 operating temp. The mechanic who started the inframe (no longer employed) put the upper #4 main in #7, (#4 upper was initially installed correctly. I ordered another main bearing kit after he said that we were missing the #4 upper main.) Psi was down to 10 with the incorrect bearing in #7. I finished the inframe after the mechanic was fired; mains 1-4, rods, heads, liners, pistons, cam. Started the engine, resolved the main bearing issue, and now I am stuck with this low oil pressure. Pulled all rods and mains to inspect. Plasti-gauged 2 mains and 2 rods (Both were in spec). Initial thought was that #7 did not feed the corresponding cam journal with oil when it had the incorrect bearing. Is this the direction I need to go? I looked at the installed cam when the pan was off and could not see any problems. Oil pressure will get up to 75 when cold. Pressure relief valve is clean. Put old oil pump in, same issue. Pulled filter by-pass apart, everything looked fine. Plumbed mechanical gauge before and after filters to verify correct readings and good filters. Jakes (not working now) still have all plugs in the rocker shaft. Quote Link to comment Share on other sites More sharing options...
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