Coolant leak woes - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 17 (permalink) Old 11-28-2017, 06:34 AM Thread Starter
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Coolant leak woes

Been chasing slow lowering of coolant overflow bottle since I purchased vehicle 2 years ago. Found leaking rad cap and replaced previously. Now have leaks on ground coming from water pump area. Not going to mess around. Here is the list of parts I bought am I missing anything???

New Tensioner
Rad Cap (CarQuest one I replaced earlier already looks 20 years old)
T-stat & gasket
Upper & lower hoses
Delco "professional" water pump
G-05 antifreeze

Serpentine belt only has 10K on it. Will measure for hose clamps once I get the hoses in hand. Can't seem to find the diameter anywhere.

FYI 2008 Hemi Limited 106K on the clock

Thx
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post #2 of 17 (permalink) Old 11-28-2017, 07:00 AM
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Replaced mine on my Hemi this summer and my list looked just like yours. Pretty straightforward repair - the hardest part is getting the belt back over, around and under the various pulleys with just one set of hands.

Only suggestion: Long sleeves. There are plastic points on the back of the radiator that dug into my forearms and gave me some pretty bad scratches. I know, I sound like a wimp but when G-05 dribbles down your arm into open scratches it ain't nice...

Bob

2006 Limited, 5.7 Hemi, Tow Package, SuperChips tuner, Full Skids, RER MyGIG Upgrade. OME HD Springs w/ Bilstein 4600 shocks
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post #3 of 17 (permalink) Old 11-28-2017, 11:16 AM Thread Starter
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Luckily I 'll have my Son fresh out of the Air Force as a Licensed Airframe & Powerplant Mechanic as I am as well, to help. A couple of cold ones should make it go as good as it can.

Thx for the reply.
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post #4 of 17 (permalink) Old 12-06-2017, 01:15 AM Thread Starter
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Update:
After a few weeks chasing a small amount of coolant usage as evidenced by the overflow bottle slowly going down, and after buying all the parts as noted above, the leak finally manifested itself as leaking out of the t-stat flange lower area. We replaced the t-stat and rad cap and utilized some gasket maker as insurance on the t-stat housing and all is good. Never would of guessed this leak would of been this hard to pin down. This is after pressure testing, revving the motor to insure t-stat was wide open, etc. All good now and engine compartment coolant smell free and dry all around.
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post #5 of 17 (permalink) Old 12-06-2017, 05:59 AM
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Quote:
Originally Posted by quickster2 View Post
Update:
After a few weeks chasing a small amount of coolant usage as evidenced by the overflow bottle slowly going down, and after buying all the parts as noted above, the leak finally manifested itself as leaking out of the t-stat flange lower area. We replaced the t-stat and rad cap and utilized some gasket maker as insurance on the t-stat housing and all is good. Never would of guessed this leak would of been this hard to pin down. This is after pressure testing, revving the motor to insure t-stat was wide open, etc. All good now and engine compartment coolant smell free and dry all around.
Good info quickster, thanks for following up.


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post #6 of 17 (permalink) Old 12-06-2017, 09:41 AM
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I had this exact Same issue basically. Had a loss of heat and coolant last month, dropped it off at a friends shop. Ended up having a cracked t-stat housing along with a stuck thermostat.


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post #7 of 17 (permalink) Old 12-26-2017, 01:18 PM
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I found a leak at the firewall on the lower radiator hose. There are T connections that are plastic and crack. Its a slow leak. Replace both hoses while in there.
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post #8 of 17 (permalink) Old 12-26-2017, 05:55 PM
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Quote:
Originally Posted by bagsy View Post
I found a leak at the firewall on the lower radiator hose. There are T connections that are plastic and crack. Its a slow leak. Replace both hoses while in there.
Yep, I've heard of this issue before, it seems to be somewhat common.


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Last edited by Big Blue; 12-26-2017 at 06:32 PM.
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post #9 of 17 (permalink) Old 12-27-2017, 01:42 AM Thread Starter
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I kept my parts even though I only used the T-stat and new rad cap. All is dry around here for once and over flow bottle is the same day after day. I figure I'll need the parts some day anyway so might as well keep them on hand.
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post #10 of 17 (permalink) Old 12-27-2017, 05:43 PM
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my 2010 hemi has had a faint coolant smell outside since the day I got it. I assume it has a pinhole somewhere in the radiator, but maybe i'll take a look at the t-stat housing and hoses also. thanks!

Johnny Mac
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