Its been a while, but I'll try to explain this. It's the cam phasers. There is a lock pin that that keeps everything in time until full oil pressure kicks in. At that point the Variable Valve timing takes over.
IIRC...the cam phaser has a spring loaded check ball that gets internally "pushed...
But to confirm, you can always call and confirm with dealer. The only compatibilty is within each Gen.
Water pumps are the same, as are many other parts. Again... call dealer to confirm
Parked mine at 282k. Needs cooling system rebuild. Have all parts but don't have time at the moment. Still runs. Been driving the truck instead. That has over 260k hard miles. 1995 F150 step side 4x4 5.8L
And it sounds like your starter may be bad. Either that, or the engine is tied up. Put a socket and ratchet on the bottom pulley and see if the pulley will rotate.
If it does...your starter is probably bad.
The reason for replacing everything in one shot... Is because all of those new parts will last for 70k (or more).
Why waste time and effort going back in to replace one part???
The hum you are hearing is the auxillary coolant pump. It will run and circulate the engine coolant until the temp drops to a certain point.
You are probably looking at a complete cooling system rebuild.
As an afterthought... Did you bleed the cooling system with the nose of the car downhill. The heater core can get "air locked" if you didn't.
Air always tries to find the highest point.
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