saltandgranite

Hey guys,

Changed out the oil yesterday and going for a coolant flush today. First time ever doing this, does anyone know if the 22r needs to be bled? Also, for anyone that has done it, do you pull the coolant drain plug on the engine block or just the radiator?

Also, super necessary to use distilled water over the hose?

Favorite coolant for an 87 22r 4x4?

Thanks!

nothingbetter

theres bound to be an air bubble somewhere in the system after you refill it. So yes, bleed the system.

The more old coolant you can get out the better. If you can get the plug out of the block...perfect. Also after flushing it, try blowing it out with compressed air if you can. Every little bit helps.

Water from the hose will have some minerals and what not in it which will build up in the block. If its possible, use distilled.

Your just asking for an argument with the last question. The most important factor is that you don't mix different kinds of coolant. I just went out and bought some concentrated stuff from the auto parts store of my choice, mixed it how I wanted and forgot about it. I keep an extra jug of the stuff around just so I remember what I had if I ever blow a hose and have to fill it.

saltandgranite

Does the 22r have a bleed valve? Or is that a stupid question...? Thanks, heading to Napa now to pick up funnel, coolant and distilled water (maybe from supermarket). Stoked to flush this thing, it sat for 25 years with the same darn coolant in it. I think there's crystal castles in there :0

TrikeKid

No bleed valve, just leave the cap off and warm it up. I would dump whatever flush chemical you're planning to use in it and run it for a while. Then leave it run with the drain open on the radiator, and a garden hose in the filler, that way you get all the old crap out, and all the flush agent out. Once the drain runs clear shut the hose and the truck off and let it drain. Then fill and bleed with your new coolant.