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09 Nitro 3.7 unknown #4494098
08/20/17 11:16 PM
08/20/17 11:16 PM
Joined: Dec 2005
Posts: 189
Boonton USA
74DartSport Offline OP
74DartSport  Offline OP
Joined: Dec 2005
Posts: 189
Boonton USA
So May 1st my daughter totaled her 05 Liberty, and it has been replaced by a 2009 Nitro w/149k miles.
No clue how long the oil was in there or what it was. Not happy, but engine is quiet so we'll see how it goes. Cooling system is tight no leaks, no loss of coolant so far in three months.
Replaced with Pennzoil Platinum high mileage 5W20.


Upholding the 74DartSport brand everywhere.
Re: 09 Nitro 3.7 unknown [Re: 74DartSport] #4494105
08/20/17 11:33 PM
08/20/17 11:33 PM
Joined: Jul 2005
Posts: 8,834
Maricopa, AZ
dave1251 Online happy
dave1251  Online Happy
Joined: Jul 2005
Posts: 8,834
Maricopa, AZ
The engine has or had a coolant leak. You should have an UOA done so you know for sure.


make the inside of your engine oil cap white.
don't use.
Re: 09 Nitro 3.7 unknown [Re: 74DartSport] #4494113
08/20/17 11:55 PM
08/20/17 11:55 PM
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
Looks like a coolant leak might be developing.


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: 09 Nitro 3.7 unknown [Re: 74DartSport] #4494136
08/21/17 02:24 AM
08/21/17 02:24 AM
Joined: Jul 2005
Posts: 30,424
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,424
NY
With an unknown history, it's a tough call. It could have a bad HG, or had a bad HG as mentioned. I would follow their suggestion and dump the oil in 3K miles and do another UOA. I would also pressure test the cooling system ASAP to confirm or rule out a bad HG before the 3K OCI is up.


God Bless Our Troops

Re: 09 Nitro 3.7 unknown [Re: demarpaint] #4494267
08/21/17 08:37 AM
08/21/17 08:37 AM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Originally Posted By: demarpaint
With an unknown history, it's a tough call. It could have a bad HG, or had a bad HG as mentioned. I would follow their suggestion and dump the oil in 3K miles and do another UOA. I would also pressure test the cooling system ASAP to confirm or rule out a bad HG before the 3K OCI is up.


Yep! Fix the coolant leak and it will run a long time...the 3.7 is a solid unit.


Thick vs Thin test: 15k / 43k miles complete
Re: 09 Nitro 3.7 unknown [Re: 74DartSport] #4494293
08/21/17 09:24 AM
08/21/17 09:24 AM
Joined: Jun 2016
Posts: 2,978
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 2,978
MN
After trying a stop-leak additive in the coolant, drive a 100 miles, change the oil, and maybe it'll clear up the tiny leak.
I prefer the liquid product with the picture below, but the tablets have a reputation for working too.
https://www.walmart.com/ip/Bar-s-leaks-Radiator-Stop-Leak-Tablets/52628136
Barr's tablets in the coolant. Or the liquid:

Re: 09 Nitro 3.7 unknown [Re: 74DartSport] #4494341
08/21/17 10:24 AM
08/21/17 10:24 AM
Joined: Jan 2013
Posts: 1,842
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 1,842
Texas
I agree , pressure test it .

I have read a lot of harrow stories about using " stop leak " products .

If possible , I would try to find the leak and repair it .

Best of luck , :-)


Wyr
God bless
Re: 09 Nitro 3.7 unknown [Re: 74DartSport] #4496427
08/23/17 08:11 PM
08/23/17 08:11 PM
Joined: Dec 2005
Posts: 189
Boonton USA
74DartSport Offline OP
74DartSport  Offline OP
Joined: Dec 2005
Posts: 189
Boonton USA
Pressure tested it tonight. Needle sagged half the width of the indicator arrow after three mins. Will decide on a stop leak solution tonight.


Upholding the 74DartSport brand everywhere.

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