Quote:
Originally Posted by humfrz
Originally Posted by @ ermax
"Most wear on bearings comes from cold starts. I call bs on their theory. Avoiding redline, cold starts and low oil conditions saves bearings but most of all, avoiding blockage from sealant will save bearings".
Note: I brought this over from the registry thread so as not to dilute that thread.
Do you reckon that is just true for the FA20 engine or all engines.
If it's just for the FA20 engine, why is that so? Isn't their enough residual oil on the rod bearings to give sufficient lubrication until the engine builds up enough oil pressure to feed the bearings?
If you figure that's true for all engines, how come I've never had a spun bearing in any of the 40 some vehicles I've had over the past 50 years?
humfrz |
Someone please someone correct me if I'm wrong:
I think it comes more from the oil not being as viscous when it's cold, vs when it's warm. A thicker oil can cause more cavitation in the oil pump, and pumps less oil through the system.
I was reading an analogy somewhere recently that used a syringe as an example. If you pull the plunger with the tip in water, it's not so hard to fill the cylinder. However, if you were to put the tip in something like syrup, and pull athe plunger at the same speed, it would be significantly harder, and you might even pull the surface of the plunger away from the syrup to create a vacuum, which
is cavitation. The point being, less substance is being pulled through the syringe when it's thicker.