Just installed a new hotrod 460 into my friend's truck. As usual alot of stuff with him is last minute and rushed, so had no time to do a proper mock up. Rockers he had were Chevy BB roller tips that would work find with about a 0.050" shorter pushrod I imagine, but of course didn't have and he had to get the truck on the road last Sunday. He handed me the remaining engine parts last Saturday of course............Anyway he had another set of aluminum body roller rockers that fit correctly with his pushrods so we used those. Doublestacked the valve cover gaskets as he had only stock covers, fired the fresh motor up (he was in a rush and rushing everything) and 3 of the rockers on each side are still rubbing against the covers once they get hot
30 minutes of breaking in the cam between 2000~3000RPM varying with Delo 400 and a bottle of EOS, listening to the rockers touching slightly, shut it down, and cut open the filter, a Fram Tough Guard (did I already say he was rushed?) Very little to no debris in the pleats, some RTV, and thats about it. But the oil that came out of the filter had that silvery sheen of dust sized aluminum particles, really cool looking actually. Anyway the aluminum didn't seem to want to stick into the pleats cause I couldn't find much there even with a Loupe. Drained the oil from the pan and it was clean as well, so all the Aluminum seemed to be in the filter (hopefully)
Took off the rockers and put them on the grinder, no more touching now. Drained the oil, fresh Delo, EOS, and new filter, took it for a test drive to break in the rings. About 5 minutes into the drive he runs out of gas, its midnight, and we are in the Everglades. Coast down in neutral, turn a corner, there is a triple A truck sitting on the side. We pull up next to him and he gets us some gas
Anyway what I seemed to have learned -
Bypass valve stays firmly shut on cold 40+ weight oil to at least 3000RPM, and this motor had 70 PSI cold.
Aluminum particles didn't seem to settle into the media which leads me to believe they probably would settle to the bottom of the filter, which leads me to also believe the flow inside the filter is very slow at any given part in comparision to the oil pump, which really makes me wonder about the bypass valve being in the bottom of the filter.
Truck is right now towing a 6000lb trailer from Florida to Boston. One day in the future he is getting a new truck body to drop this motor into, then we will see if there is anything in the bearings from the aluminum dust.
30 minutes of breaking in the cam between 2000~3000RPM varying with Delo 400 and a bottle of EOS, listening to the rockers touching slightly, shut it down, and cut open the filter, a Fram Tough Guard (did I already say he was rushed?) Very little to no debris in the pleats, some RTV, and thats about it. But the oil that came out of the filter had that silvery sheen of dust sized aluminum particles, really cool looking actually. Anyway the aluminum didn't seem to want to stick into the pleats cause I couldn't find much there even with a Loupe. Drained the oil from the pan and it was clean as well, so all the Aluminum seemed to be in the filter (hopefully)
Took off the rockers and put them on the grinder, no more touching now. Drained the oil, fresh Delo, EOS, and new filter, took it for a test drive to break in the rings. About 5 minutes into the drive he runs out of gas, its midnight, and we are in the Everglades. Coast down in neutral, turn a corner, there is a triple A truck sitting on the side. We pull up next to him and he gets us some gas
Anyway what I seemed to have learned -
Bypass valve stays firmly shut on cold 40+ weight oil to at least 3000RPM, and this motor had 70 PSI cold.
Aluminum particles didn't seem to settle into the media which leads me to believe they probably would settle to the bottom of the filter, which leads me to also believe the flow inside the filter is very slow at any given part in comparision to the oil pump, which really makes me wonder about the bypass valve being in the bottom of the filter.
Truck is right now towing a 6000lb trailer from Florida to Boston. One day in the future he is getting a new truck body to drop this motor into, then we will see if there is anything in the bearings from the aluminum dust.
