Small Coolant Leak and Temp Gauge Reading a Bit Low - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 10-13-2012, 11:28 PM
byronh
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Small Coolant Leak and Temp Gauge Reading a Bit Low

Hey everyone.

I have noticed a very faint antifreeze smell coming from the grille of my 2006 Hemi Ram 1500 for the past couple of months. My truck now has 97,300 miles on it I only notice the smell when I walk around the front of my truck (nothing in the cab) after driving a fair distance and having it up to normal operating temperature. The outside air temperature where I live is starting to go down now (close to freezing over night) and I am noticing that my temp gauge is taking longer to get to the normal operating temp (sounds normal right). But I also noticed my temp gauge now consistently sits a hair under the center line and hovers a bit lower and then higher but never touches or goes above the center line whenever I drive - even for long distances.

Also, I noticed my reservoir is at the add line. I thought it was maybe a stuck open thermostat causing the lower reading on the temp gauge- but with the smell from the grille, the temp gauge consistently running a bit low and the reservoir at the add line I think I have a leak somewhere.

Should I go somewhere and have it pressure tested? I haven't been able to locate an obvious leak on my own at this point. Even if it is a leak should the temp gauge be reading low consistently? The reservoir was at the add line but it wasn't below it. I have added some Mopar coolant to the reservoir and will see how fast I am loosing coolant.

Any input is greatly appreciated. - Thanks.

2006 Ram 1500 QC 4X4 - Tough Country 2.5" Leveling Kit / 1" rear block, Go Rhino nerf bars (Line-X'd), Cooper Zeon LTZ 275/60/20, Mopar CAI, Superchips Flashpack 3865 - Advanced Trans Tune and TM, MDS deactivated, Thrush Welded Muffler.
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#2 Old 10-15-2012, 03:26 PM
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Originally Posted by byronh View Post
Hey everyone.

I have noticed a very faint antifreeze smell coming from the grille of my 2006 Hemi Ram 1500 for the past couple of months. My truck now has 97,300 miles on it I only notice the smell when I walk around the front of my truck (nothing in the cab) after driving a fair distance and having it up to normal operating temperature. The outside air temperature where I live is starting to go down now (close to freezing over night) and I am noticing that my temp gauge is taking longer to get to the normal operating temp (sounds normal right). But I also noticed my temp gauge now consistently sits a hair under the center line and hovers a bit lower and then higher but never touches or goes above the center line whenever I drive - even for long distances.

Also, I noticed my reservoir is at the add line. I thought it was maybe a stuck open thermostat causing the lower reading on the temp gauge- but with the smell from the grille, the temp gauge consistently running a bit low and the reservoir at the add line I think I have a leak somewhere.

Should I go somewhere and have it pressure tested? I haven't been able to locate an obvious leak on my own at this point. Even if it is a leak should the temp gauge be reading low consistently? The reservoir was at the add line but it wasn't below it. I have added some Mopar coolant to the reservoir and will see how fast I am loosing coolant.

Any input is greatly appreciated. - Thanks.

Byronh,

You mentioned that the anti-freeze smell has been there for a couple of months, have you noticed your concern with the temp gauge for the same amount of time or is that more recent? You may want to have a Dodge dealer complete a thorough diagnosis and point you in the right direction.
You can PM me if you have any additional inquiries.

Dave P.
Top Care Specialist
Chrysler Canada
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#3 Old 10-16-2012, 08:15 PM
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I had a similar problem with my '05 Ram 1500 5.7. It turned out to be leaking from the bottom side of the thermostat outlet. It was a very slow leak so it would not leave a puddle. It just hit the power steering pump and then went back to the block or exhaust and would evaporate, but I could smell it. It would be a good idea to have it pressure tested. Could be as simple as a bad radiator cap
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#4 Old 10-21-2012, 08:17 PM
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Changed out the old thermostat for a new "Stant" brand 203 degree thermostat. Noticed today while driving that the temp gauge did go up a bit higher to where it is supposed to be but fluctuated between a hair below the center mark and then made it up to the center mark for a short period. At the time of the test it was pretty cold outside (about a few degrees above freezing). I will keep an eye on it but I think this has fixed the problem. If the problem returns I will most likely change out the coolant temperature sensor and go from there. As for the coolant smell it is too early to tell since coolant splashed all over the place when I changed the thermostat. Have to wait until it is all burnt off.

Thanks,

Byron

2006 Ram 1500 QC 4X4 - Tough Country 2.5" Leveling Kit / 1" rear block, Go Rhino nerf bars (Line-X'd), Cooper Zeon LTZ 275/60/20, Mopar CAI, Superchips Flashpack 3865 - Advanced Trans Tune and TM, MDS deactivated, Thrush Welded Muffler.
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#5 Old 10-21-2012, 08:19 PM
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Forgot to mention that I noticed the old thermostat had a tear right through the inner gasket so I think a small amount of coolant was squeeking itself through causing the lower temp reading on the gauge.

Cheers.

Byron

2006 Ram 1500 QC 4X4 - Tough Country 2.5" Leveling Kit / 1" rear block, Go Rhino nerf bars (Line-X'd), Cooper Zeon LTZ 275/60/20, Mopar CAI, Superchips Flashpack 3865 - Advanced Trans Tune and TM, MDS deactivated, Thrush Welded Muffler.
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