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Unread 04-17-2012, 08:13 PM   #1
CHRIS323
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what anti-freeze goes on a 2005 jeep grand cherokee v6 3.7

i was wondering what anti freeze goes on a 2005 jeep grand cherokee v6 3.7 and how do i perform a drain flush and refill ? thanks

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Unread 04-17-2012, 08:31 PM   #2
Budasac
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The coolant is Mopar MS-9769 or equivalent "HOAT" anti-freeze mixed 50/50. It should state right on the back that it meets Chrysler MS-9769 standards.
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Unread 04-17-2012, 08:36 PM   #3
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They use Mopar HOAT 5/100 coolant or Zerex G-05. Same stuff, different colors, pick your poison.

The clean way to drain is to use the draincock at the bottom of the radiator, but it's a whole lot faster (and messier) to pull the lower hose. Flushing should normally not be necessary unless it's previously been filled using tap water.

When you refill, you can either use concentrate and dilute it 50/50 with distilled water or you can buy premixed.
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Unread 04-17-2012, 08:44 PM   #4
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Originally Posted by Budasac View Post
The coolant is Mopar MS-9769 or equivalent "HOAT" anti-freeze mixed 50/50. It should state right on the back that it meets Chrysler MS-9769 standards.
ok cool then where i put it ? at the coolant reservoir or the radiator ? sorry first time doing this
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Unread 04-18-2012, 05:22 AM   #5
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coolant reservoir. And there is a fill line, that you should not go above.
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Unread 04-18-2012, 06:39 AM   #6
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Originally Posted by CHRIS323 View Post
ok cool then where i put it ? at the coolant reservoir or the radiator ? sorry first time doing this
Here's the procedure .
DRAINING COOLING SYSTEM
WARNING: DO NOT REMOVE THE CYLINDER
BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAINCOCK WITH SYSTEM HOT AND
UNDER PRESSURE. SERIOUS BURNS FROM
COOLANT CAN OCCUR.
1. DO NOT remove radiator cap first. With engine
cold, raise vehicle on a hoist and locate radiator
draincock.
NOTE: Radiator draincock is located on the right/
lower side of radiator facing to rear of vehicle.
2. Attach one end of a hose to the draincock. Put the
other end into a clean container. Open draincock
and drain coolant from radiator. This will empty the
coolant reserve/overflow tank. The coolant does not
have to be removed from the tank unless the system
is being refilled with a fresh mixture. When
tank is empty, remove radiator cap and continue
draining cooling system.

Refilling procedure :
1. Tighten the radiator draincock and the cylinder
block drain plug(s) (if removed).
CAUTION: Failure to purge air from the cooling
system can result in an overheating condition and
severe engine damage.
2. Remove the cooling system bleed plug from the
radiator upper hose inlet housing. Fill cooling system
with the antifreeze mixture (Refer to LUBRICATION
& MAINTENANCE/FLUID TYPES -
DESCRIPTION), until coolant begins coming out of
the cooling system bleed hole. Install the cooling
system bleed plug. Fill radiator to top and install
radiator cap. Add sufficient coolant to the reserve/
overflow tank to raise level to FULL mark.
3. With heater control unit in the HEAT position, operate
engine with radiator cap in place.
4. After engine has reached normal operating temperature,
shut engine off and allow it to cool. When
engine is cooling down, coolant will be drawn into
the radiator from the reserve/overflow tank.
5. Add coolant to reserve/overflow tank as necessary. Only add coolant to the reserve/overflow tank when the
engine is cold. Coolant level in a warm engine will be higher due to thermal expansion. To purge the
cooling system of all air, this heat up/cool down cycle (adding coolant to cold engine) must be performed three
times. Add necessary coolant to raise tank level to the FULL mark after each cool down period.
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Unread 04-18-2012, 09:15 AM   #7
CHRIS323
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Quote:
Originally Posted by AJeepZJ View Post
coolant reservoir. And there is a fill line, that you should not go above.
ok so coolant reservoir all the way to the fill line then nothing but water on the radiator ??
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Unread 04-18-2012, 10:35 AM   #8
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Quote:
Originally Posted by CHRIS323 View Post
ok so coolant reservoir all the way to the fill line then nothing but water on the radiator ??
If you're using ready-to-use (premixed) coolant, fill the radiator first, then the overflow to the full line.

If you're using concentrated coolant, you'll need to cut it 50/50 with distilled water, then fill the radiator with diluted coolant, then fill the overflow with diluted coolant to the full line.

Do not fill anything with pure water.
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Unread 04-18-2012, 11:15 AM   #9
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theres a line on the coolant resevoirr that says ADD___ then on top it says FULL___???
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Unread 04-18-2012, 12:07 PM   #10
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Quote:
Originally Posted by CHRIS323 View Post
theres a line on the coolant resevoirr that says ADD___ then on top it says FULL___???
I gave you the procedure right from the service manual ...

Fill radiator to top and install
radiator cap. Add sufficient coolant to the reserve/
overflow tank to raise level to FULL mark.
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Unread 04-18-2012, 02:05 PM   #11
CHRIS323
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Quote:
Originally Posted by yzjwk View Post
I gave you the procedure right from the service manual ...

Fill radiator to top and install
radiator cap. Add sufficient coolant to the reserve/
overflow tank to raise level to FULL mark.
thank you sir this i do understand but all those words got me confuse lol thanks
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Unread 04-18-2012, 02:18 PM   #12
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Quote:
Originally Posted by CHRIS323 View Post
thank you sir this i do understand but all those words got me confuse lol thanks
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Unread 04-18-2012, 02:23 PM   #13
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No problem , but (looking at your first post) is your plan to drain the entire system , or are you just emptying the rad and the overflow ??
If you want to completely drain the system , your going to have to pull the block plug and drain that too . But if you do that then you should read the whole procedure and make sure you fill it correctly or there's a good chance you'll overheat and/or have problems later .
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Unread 04-18-2012, 03:08 PM   #14
CHRIS323
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Originally Posted by yzjwk View Post
No problem , but (looking at your first post) is your plan to drain the entire system , or are you just emptying the rad and the overflow ??
If you want to completely drain the system , your going to have to pull the block plug and drain that too . But if you do that then you should read the whole procedure and make sure you fill it correctly or there's a good chance you'll overheat and/or have problems later .
the water inside the radiator looks kinda brown what should i do ? im thinking of draining the dirty radiator water then flush the radiator with a garden hose then close the draincock put clean water let it run for a little then drain that water then close it then add water to the radiator full it up close it then add coolant on the coolant reserve all the way to full line . is that the right way to do it ?
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Unread 04-18-2012, 03:43 PM   #15
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the HOAT coolant that comes from the factory sometimes has an orangey/rusty color to it, not always green like it used to be . I'd be surprized if you dont have coolant mixed in and your just looking at rusty water .If you take the jeep to a garage they should be able to test your coolant using a glycol hydrometer and tell you what your water to antifreeze mix is for free . If you have only water in there , let them fix it .If not ,and you want to drain it , then just drain and refill the rad and resevoir unless your having cooling problems . don't use tap/hose water . You should use distilled water you should be able to buy at the auto store . pre mix the coolant (only if the coolant you buy is NOT already pre mixed) before you fill the rad and resevoir at the same time .
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