MRL Performance
Well-Known Member
I have seen tight cam bearings MELT and cause a hard crank, not being able to idle and low oil pressure.
I have seen tight cam bearings MELT and cause a hard crank, not being able to idle and low oil pressure.
yeah i realize that now, but i didn't know much at all 3 years ago (was only 15 years old) so i was just the eager kid doing what i was told and building a car with burger-flipping money haha
I have seen tight cam bearings MELT and cause a hard crank, not being able to idle and low oil pressure.
Your location says Howards Grove are you in WI?? like by Sheboygan??
I have had main bearing problems in a 360 and a 340 block. They would both kill the center 3 bearings like some kind of balance problem. I rebuilt the 360 four times!! I was about to scrap the block as it was the only part that wasn't changed the previous four times. Long story short----The main oil feeds that intersects the lifter galley hadn't been drilled the right diameter all the way through---So the bearings would receive just enough oil to live--Until this engine exceeded 5000 rpm. I drilled them out to 9/32" and found that the bottom 4 inches wasn't drilled from the factory--which is why it lived for so long--never having enough cam or valve spring to rpm over 5000rpm. I found the same thing on the 340 block--actually worse.
Both engines are now living happily--The 360 with J heads making 430hp and the 340/418 W2 heads making over 500hp.
I drill them no matter the application. J.Rob
i was hoping to see pics of the chunks that were in the filter.
could you elaborate more on this??I have had main bearing problems in a 360 and a 340 block. They would both kill the center 3 bearings like some kind of balance problem. I rebuilt the 360 four times!! I was about to scrap the block as it was the only part that wasn't changed the previous four times. Long story short----The main oil feeds that intersects the lifter galley hadn't been drilled the right diameter all the way through---So the bearings would receive just enough oil to live--Until this engine exceeded 5000 rpm. I drilled them out to 9/32" and found that the bottom 4 inches wasn't drilled from the factory--which is why it lived for so long--never having enough cam or valve spring to rpm over 5000rpm. I found the same thing on the 340 block--actually worse.
Both engines are now living happily--The 360 with J heads making 430hp and the 340/418 W2 heads making over 500hp.
I drill them no matter the application. J.Rob
RAMMs talking about one of the oil system mods for sustained rpms. Different year engines may have different sized oil feeds from the lifter galley to the main saddle. It's standard practice to enlarge them to 9/32" with a long drill.