NOT A MECHANIC <- Couple things. Radiator won’t drain even close to the entire coolant capacity, maybe half. Several quarts will remain in the block, hoses and whatever else uses coolant, heater core oil cooler PTU cooler if equipped. Secondly, you HAVE to use a vacuum filler to bleed the system. This is where I got screwed with my 3.7L (3.5 bored to 3.7), vacuum bleed didn’t work and no other “normal” bleeding got rid of the air. You HAVE to take it a shop or fully drain the cooling system to vacuum fill it, and THEN do the 6x 3.5k rpm for 30s>idle 30s>off 30s bleed procedure.
Also, keep a close eye on your water pump weep hole, mine began leaking within a couple hundred miles of flushing. Seems connected, maybe just a matter of time. You do not want to f around with the pumps on these.
NOT A MECHANIC <- Couple things. Radiator won’t drain even close to the entire coolant capacity, maybe half. Several quarts will remain in the block, hoses and whatever else uses coolant, heater core oil cooler PTU cooler if equipped. Secondly, you HAVE to use a vacuum filler to bleed the system. This is where I got screwed with my 3.7L (3.5 bored to 3.7), vacuum bleed didn’t work and no other “normal” bleeding got rid of the air. You HAVE to take it a shop or fully drain the cooling system to vacuum fill it, and THEN do the 6x 3.5k rpm for 30s>idle 30s>off 30s bleed procedure.
Also, keep a close eye on your water pump weep hole, mine began leaking within a couple hundred miles of flushing. Seems connected, maybe just a matter of time. You do not want to f around with the pumps on these.