Behaving badly

[BYprodriver]

Originally Posted by BYprodriver

Answer: No, any loose debris in the valve train area will eventually fall to the bottom of the head, which is shaped like a ramp to direct oil to the mini sump at the bottom of the "ramp". From here the scavenge pump sucks the oil etc thru a small passage into the main oil sump area where it goes thru the "swirl-pot" to the bottom of the sump. Any solid particles going into these passages will impede oil flow.

If you remove the oil scavenger pump, (being careful to note the position it is installed & replace the same orientation or it will not pump) you may see debris there &/or in the pump. Cam chain will block your view but this puts you 3" from the bottom of the cam cover sump. You may need to replace the huge pump O-ring seal.

[Duquette5]

That may allow me better visibility with the borescope. It's 5.5MM so I should be able to get it in and around ok. That will also allow me to inspect the scavenge pump to make sure it hasn't eaten anything yet...