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Unread 09-26-2013, 11:57 PM   #1
twingler
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5.7L Hemi - Coolant Leak

My 2005 Limited WK started leaking coolant in the past few days. Started as a small puddle under front bumper, driver side. I noticed it after parked for about 15min. Puddle about 4-6" round. But getting worse, today I parked, got out and see coolant steady dripping in the same area. I don't see any sign of coolant leaking from under the hood. nor do I see it leaking underneath around the water pump/engine. I'm thinking its the radiator leaking. No overheating.... oh and I live in Phoenix. So it's always hot. Can anyone else confirm my suspision of a radiator leak or should I check something else first - cap, overflow tank, etc ???

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Unread 09-27-2013, 06:59 AM   #2
Jeepforthewin
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Get a pressure test done. Should be able to pinpoint where it is leaking from.
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Unread 09-28-2013, 10:44 AM   #3
twingler
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pressure testing to 15psi revealed a leak at the thermostat housing gasket. Thinking I'lll go ahead and replace all coolant system parts, radiator, water pump, thermostat, hoses and drive belt. I bought this Jeep used with 105k miles.... now has 130k and I want to keep her in top shape.
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Unread 09-29-2013, 02:31 PM   #4
Burnerman
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I just replaced the thermostat today, same small leak. The thermostat I took out was wasted! It has a permanent rubber gasket around the perimeter that was torn and the guts of the thermostat were missing pieces of rubber.
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Unread 09-30-2013, 10:07 AM   #5
Shafer57
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Quote:
Originally Posted by twingler View Post
pressure testing to 15psi revealed a leak at the thermostat housing gasket. Thinking I'lll go ahead and replace all coolant system parts, radiator, water pump, thermostat, hoses and drive belt. I bought this Jeep used with 105k miles.... now has 130k and I want to keep her in top shape.
If it aint broke, don't fix it

Living in Phoenix though I understand your reasoning. But i'd simply swap out the stat, and maybe have the coolant system serviced. I personally wouldn't go replacing all of that if the fix might be as minor as a $6 thermostat

Just my .02
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Unread 10-01-2013, 11:22 AM   #6
XK1982
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Originally Posted by Shafer57 View Post
If it aint broke, don't fix it

Living in Phoenix though I understand your reasoning. But i'd simply swap out the stat, and maybe have the coolant system serviced. I personally wouldn't go replacing all of that if the fix might be as minor as a $6 thermostat

Just my .02
Agreed! Just get the thermostat and in the process you'll have to replace all the coolant anyway. I definitely wouldn't replace the radiator unless you just have $$ to burn! Good luck!
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Unread 10-02-2013, 01:03 PM   #7
twingler
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Thanks for the feedback and opinions guys. I'll go with the Tstat / gasket first and new coolant.
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Unread 10-02-2013, 01:53 PM   #8
yzjwk
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Make sure they use HOAT coolant . As far as i know MOPAR or Zerex G-05 are your only options .
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Unread 10-02-2013, 04:11 PM   #9
Walt
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Quote:
Originally Posted by twingler View Post
... I'll go with ...new coolant.
Quote:
Originally Posted by yzjwk View Post
Make sure they use HOAT coolant . As far as i know MOPAR or Zerex G-05 are your only options .
The MOPAR HOAT is not diluted, so prepare a 50/50 mix when replacing it. FWIW, mine was on sale at $18/gallon at the Jeep dealer. Regular price was $25/gallon.
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Unread 10-03-2013, 07:20 AM   #10
Burnerman
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I purchased MOPAR 50/50 hoat coolant at the dealer for less then $12 a gallon. It was cheaper then the Zerex at the parts store.
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Unread 10-04-2013, 11:35 AM   #11
twingler
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Burnerman - Thanks for the dealer tip....however My local dealer was $47/gallon for pre-mix. Parts store is $18/gallon pure for G-O5.
Another general question - Anyone used a Pre-flush cleaner product? Suggestions / comments??
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Unread 10-04-2013, 12:11 PM   #12
Burnerman
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$27!!!!! Holy spit!!!!
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