milling the main for oil passages?

[Drift_FX]

Originally Posted by Croustibat

SR dont have oiling issues, except when camshaft sprayers get blocked. Or oil pump is worn.

There are so many people bashing these engines saying they are not reliable, and use ultra thick oil to get "the good oil pressures", when they really should replace their worn oil pump ... The way these pumps are made and regulated means the more pressure, the less flow; and if it cant give recommended pressure with recommended oil thickness, it means it does not produce enough flow. Therefore using thicker oil only leads to even more reducing the flow, ultimately killing the engine. Now if you are making more pressure at the bearings, oil flow will go the easiest way, i.e. the place with the least pressure. I dont know if it will go where you want it; i think it would go to the spray bars.

That is where the "CAs and SRs are crap because they eat their main and end bearings" come from. Not enough pressure while clearances and oil are ok ? Change your damn oil pump. Using fancy bearings wont make the pump work better. Not saying coatings are bad, but really if you get oiling problem, get to the root of it. Which, on these engines, is the pump and the spray bars for head problems. And blocked breathers.

let me clarify, i didnt mean issues as in its a crappy system. i meant that the oiling to the rods is the weakest point in the system and can become an issue for highly modified/ hight hp motors.

and secondly i am refering to building a brand new motor, not polishing a turd. so the old worn out oil pump comment was irrelivent.

[wangan_cruiser]

Originally Posted by Drift_FX

so the old worn out oil pump comment was irrelivent.

i think he meant in general that people says ca and sr are unreliable due to the fact that they do eat their bearings for breakfast no matter what. but in reality these motor sat down in yards for days exposed thru climate changes. before making it in here shits makes the oil pumps seized.

[Croustibat]

Originally Posted by wangan_cruiser

i think he meant in general that people says ca and sr are unreliable due to the fact that they do eat their bearings for breakfast no matter what. but in reality these motor sat down in yards for days exposed thru climate changes. before making it in here shits makes the oil pumps seized.

Yes, that.

Well not only. Time takes its toll too, even if an engine has not been left lying around, at some point an oil pump change is needed. And at that point most people just see low oil pressure and ... put thicker oil to get the good pressures again. Which kills the engine "while oil pressures are good", as the price to pay for more pressure on a worn pump is "very poor flow".