Cooling system issues, How to purge air? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 05-28-2011, 06:52 PM
Hughes
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Cooling system issues, How to purge air?

It's been awhile since I last visited but never needed because my truck has been great with zero issues.

My truck is a 2006 Ram 1500 2wd with 4.7 L engine. 110,000 miles. Here's my issue, my truck started running a warmer than normal so I say heck the coolant is pass due for changing and the thermostat also. When I went to remove the lower bolt on the thermostat cover it came about 1/4 of the way out and stopped. It would not retigthen either, it felt like it was cross threaded. I tried to work it back and forth and then it just broke off into the alumn. housing. I tried to drill the bolt out, but a few hours later I broke a drill bit off into the bolt so that ended that.

I'm not sure what that housing is called that the plastic thermostat cover mounts to. I not sure where I can get one either.

I bought this truck new and it has never had the thermostat changed so the bolt came cross threaded but that not big deal at this time as I need parts.

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Last edited by Hughes; 05-29-2011 at 07:30 PM.
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#2 Old 05-28-2011, 08:01 PM
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I think it's called a timing chain cover. Any how to tips?

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#3 Old 05-28-2011, 08:05 PM
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Definite Bummer! I would be looking locally for some help. I remember in school. If you broke an easy out off. You need a machine shop with an EDM to remove it. I think it is called a EDM? You may end up having to pull you timing chain cover off to get it removed? Then get a heli coil to repair the thread.
Working on rusted shit has never been my speciality. I usually will use my torch if safe to heat. I dread the situation your in !
You can get a new t/stat housing at the dealer. I have also seen them on Rock Auto. I would really be looking locally for somebody with experience to a get hands on opinion. Hopefully they can get it out without removing the cover. Good Luck.

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#4 Old 05-28-2011, 08:12 PM
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Thanks, Yep once that drill bit broke off I knew it was over. I think if I can get the cover off I might be able to get the broken bolt out and heli coil it. Problem I have found is the cover is a dealer item and I need this to be up and running by end day monday. Thanks.

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#5 Old 05-28-2011, 08:16 PM
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If you get it out. Go to Home Depot or Lowes and get some grade 8 bolts. Use some anti seize on them as well.

2003 Ram 1500 SLT, 4.7,4x4 L.B. 4.10 motive gears, auburn LSD, PML rear diff cover, 3715 super chip, airaid M.I.T. & E.A.A. dry air filter, flexalite electric fan B.M. 180 extreme with moe's fan shroud delete kit, 180* stat, JBA shorty headers, homebrew power wire, aeroforce interceptor scan gauge, sonnex line pressure booster.
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#6 Old 05-29-2011, 07:09 PM
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Got the timing chain cover off and removed the broken bolt and installed heli coil, got everything back together and just can't get the cooling system purged of air.

I took pictures of the belt before I removed and have confirmed serveral times that I have the belt for the water pump routed correctly. Confirmed also with service manul for truck.

Top radiator hose is hot and lower hose going to the thermostat is cool and also the radiator cap is cool. I also confirmed with service for proper install of the thermostat.

What's the trick to getting this cooling system purged and working?? Thanks.

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K&N Drop In Air Filter
Slash Guards
Hella's Behind the grille
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#7 Old 05-29-2011, 08:09 PM
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No external leaks, no water in oil, lower rad hose seems to not have coolant in it.

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K&N Drop In Air Filter
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Hella's Behind the grille
265/70/17 Nexen Tires
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#8 Old 05-29-2011, 08:54 PM
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Sorry guy's I just need this truck running. Once the truck is up to temp shouldn't I be able to remove the rad cap and see coolant flowing through the rad if the thermostat is opening? I got nothing. New thermostat also.

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265/70/17 Nexen Tires
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#9 Old 05-29-2011, 10:07 PM
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Did you remember to open and run the heater while you check the system?

If you start a thread, be responsible and post the final outcome.


2002 Ram 1500 SLT 4x4 QC ~ 02 Ram 45RFE to Jeep GC TCM 5-45RFE Upgrade - (Nov.01) 4.7L with 85K/3142hrs, Knolton Thunder Cylinder Heads & HO Cams by Sawcut, 4.56 R&P/DTT, SRT-10 Pod w/Dynojet Wideband Commander, 2-speed manual transfer case, Clifford Security System w/Auto Start/Auto Windows, RB1 CD/DVD/NAV Infinity Sound System w/30GB iPod, Offroad Package, 33" BFG T/A KO, Mopar Rear Wheel Liners, EBC Greenstuff Roadsport Brake Pads, K&N w/Airaid Jr Modular Intake Tube, BBK 70mm Throttle Body, AIR_RAM Jet Stream Scoop, PML Diff Cover, ASP Underdrive Crank Pulley, MSD 1.65 Alt Pulley, V8 Lincoln E-Fan, 2-Speed DCC E-Fan Controller, 180 Jet T-Stat, Flowmaster SI/DO Exhaust, Tire-2-Tire Chrome Tuber Step, Line of Fire LED Light Bar, Sylvania Ultra Silverstars, $1600 Oil Pickup Tube

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#10 Old 05-29-2011, 10:11 PM
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You might have gotten a bad thermostat. I think on the 4.7s theres a plug you can take out on the motor where the upper hose goes in to bleed the system. Pull this and let it reun for a bit see if it helps. If not you might have to replace the thermostat again,

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#11 Old 05-29-2011, 10:35 PM
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How long are you running the motor? It can take a little while to get the thermostat to crack open.

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#12 Old 05-29-2011, 10:53 PM
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When I have to purge air from my hemi I uncap the radiator, start the truck, turn on the heater, and give it about 15 minutes. It has to reach closed loop before it even engages the t-stat, so you've got to get it up to operating temperature before it can even begin to purge air.

Another added tip is to tilt the truck on a slant so that the front is nose up. Be sure to set the parking brake.

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#13 Old 05-29-2011, 11:13 PM
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Quote:
Originally Posted by dmcelhannon View Post
Did you remember to open and run the heater while you check the system?
OK ... second question ...

Did you make sure the bleeder hole on the t-stat was at the 12-o'clock?

If you start a thread, be responsible and post the final outcome.


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Texas 1845: We the People of the Republic of Texas, acknowledging,
with gratitude, the grace and beneficence of God.


~ Waiting to replace my Ram! ~ 2014 October 23rd WAS Judgement Day! ~
*** After 849-Days (2-Years 119-days) We Nailed Their A$$ to the Barn Door ***


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#14 Old 05-30-2011, 10:04 AM
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On the last engine I rebuilt ( 355 chevy ) I drilled a super small hole in the thermostat before I installed it, and so ran the truck for a while with the rad cap off with the heater on. Drilling the small hole in the t-stat let's the air pockets get around the closed t-stat and escape threw the open rad cap

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