Bleeding air out of coolant system 2016 ram 2500 6.4l

[Patrick2016]

I’m trying to bleed the air out, through the resivor cap and running it. It’s not bubbling not is raising to the point of I do t shut it off coolant will be everywhere. Any help? Thank you!

 

[SitKneelBend]

I’m trying to bleed the air out, through the resivor cap and running it. It’s not bubbling not is raising to the point of I do t shut it off coolant will be everywhere. Any help? Thank you!

On my 3.6, there is an air bleeder on the thermostat housing itself. Did you look there for a bleeder screw?

 

[Patrick2016]

I did

 

[crash68]

The 6.4 in the HD trucks have a pressurized reservoir tank which acts like a degas bottle. Coolant actually flows through that tank to aid in removing air bubbles in the coolant. There are MIN and MAX fill lines on that bottle, you don't want to go over the max when cold or there's a good probability the pressure cap will release excess coolant.
The ideal way to refill just about any automotive cooling system it to use a vacuum fill system that pulls the air out before sucking the coolant in.

 

[SitKneelBend]

The 6.4 in the HD trucks have a pressurized reservoir tank which acts like a degas bottle. Coolant actually flows through that tank to aid in removing air bubbles in the coolant. There are MIN and MAX fill lines on that bottle, you don't want to go over the max when cold or there's a good probability the pressure cap will release excess coolant.
The ideal way to refill just about any automotive cooling system it to use a vacuum fill system that pulls the air out before sucking the coolant in.

My Pacifica is this way. I park it on my steep driveway engine at the top of the hill and remove the reservoir caps. Bad idea?

 

[Patrick2016]

The 6.4 in the HD trucks have a pressurized reservoir tank which acts like a degas bottle. Coolant actually flows through that tank to aid in removing air bubbles in the coolant. There are MIN and MAX fill lines on that bottle, you don't want to go over the max when cold or there's a good probability the pressure cap will release excess coolant.
The ideal way to refill just about any automotive cooling system it to use a vacuum fill system that pulls the air out before sucking the coolant in.

So are you saying if there is air in there it should come out on its own?

 

[crash68]

So are you saying if there is air in there it should come out on its own?

Nothing is absolute, get the engine up to operating temp then let it cool off then open the coolant cap and check the level. Check the level again after each time after a couple of drive cycles

 

[mtofell]

I can't remember which truck/engine but a discussion on here I saw once a guy who seemed to know a lot about it said to elevate the truck on ramps, etc. to help get the air out. A lot of people laughed but it seemed to work.

 

[SitKneelBend]

I can't remember which truck/engine but a discussion on here I saw once a guy who seemed to know a lot about it said to elevate the truck on ramps, etc. to help get the air out. A lot of people laughed but it seemed to work.

I do this and squeeze the upper radiator hose (except I use my driveway).

 

[Patrick2016]

I do this and squeeze the upper radiator hose (except I use my driveway).

So you leave the cap on, correct? Elevate the front end and squeeze the top radiator hose?

 

[Wild one]

So you leave the cap on, correct? Elevate the front end and squeeze the top radiator hose?

Leave the cap off,and if you have another person to help you,have one under the truck squeezing the bottom hose while another one is squeezing the top hose,alternate squeezes.The one on the bottom hose will have to feel around the hose to find a spot they can squeeze that the internal spring isn't in the way. Make sure you have the heater temp cranked up to,you don't need the heater fan blowing,but you want the temp turned up as much as it'll go.Use gloves if you're doing this while it's hot and running,but it'll also work when it's cold,but you'll have a harder time squeezing the hoses. Also helps to have it up on ramps,or a steep driveway.

 

[SitKneelBend]

So you leave the cap on, correct? Elevate the front end and squeeze the top radiator hose?

I don't, I put one of these on where the cap goes, easy to watch the bubbles come out that way BUT if I understand correctly yours has a reservoir fill which will function just like this for your truck (you should be able to see it bubble in your reservoir)...

EPAuto Spill Proof Radiator... https://www.amazon.com/dp/B01I40ZQWE?ref=ppx_pop_mob_ap_share

Edit: also, be mindful of temperature in the gauge, it WILL boil over as it reaches the boiling point with the cap off. It can happen pretty quick too.

 

[KenR 955]

Use one of these to burp the air. Spill free funnel. Any auto parts place should have one, as does Horrible Freight.

 

[KenR 955]

So you leave the cap on, correct? Elevate the front end and squeeze the top radiator hose?

Using the funnel I spoke of before, Connect it as per the instructions, fill it about half way, center plunger/plug stick out. Start truck, let it run and as it gets up to operating temp, squeeze the top hose in various areas to purge air. When the thermostat opens, you will see bubbles and the truck will take some of the coolant. Keep doing this till no more bubbles come out. (Mine took about 30 minutes). I then let mine sit overnight with coolant in the funnel, center plunger out. In the morning about half the coolant got sucked into the radiator. I did the run,burp,squeeze dance once again to confirm no air trapped. There was none. Then plug the funnel and remove the entire funnel from the rad. Have a rag handy, as you will spill an ounce or two. Put the rad cap on (You did test the cap, right? Mine was no good.) Attach the expansion tank (You did clean it, right? Mine had some crud in it.)
You should be good to go.

 

[Wild one]

Another tip i always do,is fill the block as full as i can with the thermostat housing off,that way you have less headroom for air to be trapped in the block,once the anti-freeze level is starting to drip out the thermostat hole,install the thermostat and housing

 

[04fxdwgi]

Another tip i always do,is fill the block as full as i can with the thermostat housing off,that way you have less headroom for air to be trapped in the block,once the anti-freeze level is starting to drip out the thermostat hole,install the thermostat and housing

And be sure to install tstat with the air bleed hole in it at 12:00

 

[dieselscout80]

And be sure to install tstat with the air bleed hole in it at 12:00

The 6.4 thermostat and housing is all one pre assembled unit and cannot be adjusted.

 

[CMV157]

I can't remember which one, but I disconnected one of my heater hoses from the firewall and filled until it steadily came out. Then slid the hose back on and continued to fill until full. No air lock.

 

[Bighorn_Brown]

My Pacifica is this way. I park it on my steep driveway engine at the top of the hill and remove the reservoir caps. Bad idea?

No… not a bad idea. I’ve done the same in the past. To add to that, also run the engine until it gets to operating temp with heat on the highest temperature and fan speed setting for an additional 5-10. While temps are rising I’ll monitor the air escaping from the radiator. Reinstall cap to let it build pressure. Then remove once system has had a chance to cool. At which point I check coolant level. If all good I button everything back up.

Some vehicles do have a specific bleed air screw located somewhere on the block; as mentioned in an earlier post.

 

[dopey137]

View attachment 574063
Use one of these to burp the air. Spill free funnel. Any auto parts place should have one, as does Horrible Freight.

picked one of these up locally from a guy on facebook - 10 bucks - worked great !! tried 3 times to get the air out but the truck was fighting me until i got this.