|
|
|
|
Original Message
|
| Oh No!...Not Again!...Low Oil Pressure |
| By John - 07/06/2002 7:14:30 PM; IP 142.177.114.180 |
| With the many letters in this forum regarding low oil pressure combined with my own experience with these engines, it seems that oil pressure should be about 20 psi (hot) at idle and 75 to 80 psi (cold)where it's limited by the oil pump bypass valve. I usually get about 60 psi with hot oil at 2000 rpm with 10W40. After having to rebuild my engine due to low oil pressure (cracked block and antifreeze stripped the bearings) I have found to my dismay low oil pressure again. Right from the intial cranking with the plugs out to the first start up. It's not getting worse, but drops below 10psi once the oil gets up to over 200degF. I am using 10W30 mineral oil to seat the rings and had planned to switch to 5W50 synthetic about now. I didn't check the bearing clearances this time (they should be 0.0025")as the machine shop I deal with has always put them where I want them every other time (a mistake I see now). Other than having the crank turned and a different new oil pump and pick-up, everything else is the same. The engine is a 428 with plugged lifter galleries for the solid lifter cam. All the oil gallery plugs are threaded. Has anybody ever experienced this low oil pressure after a rebuild? The engine runs fine with no noise and no smoke. Does anyone think that the switch to 5W50 will cause a significant increase in pressure? I just wonder if I left the threaded plug out of the block behind the cam gear....I know all the others are in for sure...nah....couldn't have made that mistake. |
|
|
This thread, so far...
|
|
|
|
Post A Response
|
|
|
|
|
|