tinytrax78

I started using a AIR LIFT and have never looked back ,it saves so much time it is crazy

Jeepwalker

Why raise the back end? I would think raising the front end would make more sense? Thanks

Ralph77

To help with the burping that is what I thought I read too. Front end and I think driver's side higher.

gat

That I was recommended to make the back of the head the highest part of the cooling system. This was a part of the suggestion to remove/unthread the coolant temperature sensor at the back driver's side of the head. This is a somewhat common suggestion for the closed systems.

Jeepwalker

Won't air collect inside at the top/back of the head if the *** end is raised?Or is that the point: to get it out of the radiator into the head.

If the front is raised a moderate amount the thermostat housing (where the heater hose exits) would be the highest point ..and still higher than the radiator. ....assuming it's on a medium incline and not too steep. I'm not sold on the logic of raising the rear. Someone please provide a more detailed explanation.

PatHenry

I think the idea is to vent the air out of the Temp sending unit port at the back of the head.

Personally, I've never had an issue burping out the radiator cap. Removing the temp sending unit and lifting the rear end seems an awful lot of work when the system bleeds just fine out of the radiator cap with the front end on a slight incline. I suppose if there's no better way to bleed a closed system on an older Renix era Jeep, then it is what it is. I've never dealt with a Renix-type closed system, so I have no idea or opinion in that regard.

PatHenry

I like 50/50 simply because I don't have to mix (and possibly screw up the mixture).

If you're flushing your system and will be running several gallons of straight distilled water through the system before you're done, it's a little different. You could have trapped water in the system when you do the final drain - therefore you might want to put 1/2 the capacity of the system in unmixed coolant, then fill and top-off with distilled water. Since you're not using a pre-mix in this scenario, you'll want to test the coolant once it's full and you've driven it a little bit just to be sure. If it's not, then adjust the mixture accordingly until it's right.