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Coolant leak, '06 3.9

 
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Bill58
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PostPosted: Mon Mar 24, 2014 11:23 am    Post subject:  Coolant leak, '06 3.9 Reply with quote

í06 3.6
Car has developed a coolant leak. Itís coming from below the alternator hard to see exactly where even from under the car. Have a wet spot on driveway after parked 2 days.
Has anyone done the coolant crossover gasket change- TSB #07-06-02-006A?
Iím hoping the head gasket is ok. Any input appreciated.
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Irish_alley
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PostPosted: Wed Mar 26, 2014 12:03 am    Post subject:   Reply with quote

dont know the layout of 05+ but there is a weep hole on the underside of the water pump when its bad (seal) it will leak and weep out of this hole. dont know if anything is in the way to direct the coolant elsewhere. but most time on other cars i have worked on if the leak is near the accessories its either there or a hose

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Bill58
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PostPosted: Wed Mar 26, 2014 8:24 am    Post subject:   Reply with quote

Irish_alley wrote:
dont know the layout of 05+ but there is a weep hole on the underside of the water pump when its bad (seal) it will leak and weep out of this hole. dont know if anything is in the way to direct the coolant elsewhere. but most time on other cars i have worked on if the leak is near the accessories its either there or a hose

I wish it was the water-pump, easy change on a 60* v-6. I have gaskets for the coolant pipe ordered and Iíll give it a go. What could possibly go wrong? Laughing
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SFCR
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PostPosted: Wed Mar 26, 2014 9:47 am    Post subject:   Reply with quote

Bill58 wrote:
Irish_alley wrote:
dont know the layout of 05+ but there is a weep hole on the underside of the water pump when its bad (seal) it will leak and weep out of this hole. dont know if anything is in the way to direct the coolant elsewhere. but most time on other cars i have worked on if the leak is near the accessories its either there or a hose

I wish it was the water-pump, easy change on a 60* v-6. I have gaskets for the coolant pipe ordered and Iíll give it a go. What could possibly go wrong? Laughing

Hi Bill,
If you're still under the powertrain warranty, that will cover the cost. Otherwise, it will probably run you about $400.00 to repair, which is mostly labor. The parts include 2 gaskets, a seal, and antifreeze. These parts should be around $80.00, so the remainder is labor. I was going to repair it myself, but since this has been an issue with the 3.9, I decided I would pay for the repair. That way I would have 12 months/12,000 miles coverage for parts and labor since the warranty had expired. The gasket was replaced under the powertrain warranty, which has since expired...and that gasket started leaking again at 14 months/10,000 miles after the first repair. Since the warranty had expired, I called GM and they transferred me to a regional warranty rep. He called the dealership and they discussed the issue of warranty coverage. They covered the cost, but I had to pay a $100.00 deductible. I'm not complaining though. The cost would have been $422.00 otherwise. They found that the gasket was defective.

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Bill58
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PostPosted: Thu Mar 27, 2014 6:15 am    Post subject:   Reply with quote

SFCR wrote:
Bill58 wrote:
Irish_alley wrote:
dont know the layout of 05+ but there is a weep hole on the underside of the water pump when its bad (seal) it will leak and weep out of this hole. dont know if anything is in the way to direct the coolant elsewhere. but most time on other cars i have worked on if the leak is near the accessories its either there or a hose

I wish it was the water-pump, easy change on a 60* v-6. I have gaskets for the coolant pipe ordered and Iíll give it a go. What could possibly go wrong? Laughing

Hi Bill,
If you're still under the powertrain warranty, that will cover the cost. Otherwise, it will probably run you about $400.00 to repair, which is mostly labor. The parts include 2 gaskets, a seal, and antifreeze. These parts should be around $80.00, so the remainder is labor. I was going to repair it myself, but since this has been an issue with the 3.9, I decided I would pay for the repair. That way I would have 12 months/12,000 miles coverage for parts and labor since the warranty had expired. The gasket was replaced under the powertrain warranty, which has since expired...and that gasket started leaking again at 14 months/10,000 miles after the first repair. Since the warranty had expired, I called GM and they transferred me to a regional warranty rep. He called the dealership and they discussed the issue of warranty coverage. They covered the cost, but I had to pay a $100.00 deductible. I'm not complaining though. The cost would have been $422.00 otherwise. They found that the gasket was defective.

Warranty long gone at 8 years and 117K miles. Good point to pay and get a 12/12 warranty.
I put some Bars Leaks in which has greatly slowed the leak. Waiting for gaskets and warm weather. Looks like remove alt., p/s pump, belt, pulleys and a couple hoses then the coolant crossover. TSB does say "Before installing the new gaskets, make sure that the mating surfaces on the crossover manifold and cylinder head are completely clean and that NO OIL or OIL RESIDUE exists." I'll keep it clean and if it turns to poo, I've got my feet. Thanks for input!
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