Intake Manifold Gasket May Leak Coolant or Engine Oil on Chevrolet Impala

The intake manifold gasket can develop external engine oil or coolant leaks. In some cases the failed gasket will leak coolant internally. The manifold gasket will need to be replaced to correct this issue.

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Average mileage: 109,282 (6,000–260,000)
Engines affected: 3.4L V6, 3.5L V6, 3.8L V6, 3.9L V6
12 model years affected: 2000, 2001, 2002, 2003, more2004, 2005, 2006, 2007, 2008, 2009, 2010, 2013
130 people reported this problem
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Viewing 1 - 20 of 66 problem details
2003 Chevrolet Impala - 3.8L V6 74,000 mi,
i have a leak in the intake manifold. gasket..tried using this stop leak.. treatment for leaky coolant.system seems to have helped. not much leakage. but still need to get it fixed but it costs so much. money. is there a class action suit for this. defect???
2002 Chevrolet Impala - 3.4L V6 194,238 mi,
I was told intake manifold gasket was leaking coolant and possibly oil. If this is such a problem how come no recall? Is there a lawsuit for this?
2003 Chevrolet Impala - 3.4L V6 100,000 mi,
My oil level kept going down to the point where I was adding 1 quart every 1000 mies. Gas milage was cut to 18 mpg avg. where it used to be 26 mpg avg. Acceleration was terrible, especially uphill. I pulled the intake manifold and found the original gasket was basically gone! There were little bits and pieces stuck in near the cooling ports. Oil was getting into the intake side because of this failure and thus clogged the catylitic converter! I replaced the intake gaskets (upper and lower) and the converter. Oil had got into the cooling systen too. I flushed out all DEXCOOL and replaced it with conventional "GREEN" antifreeze. Dexcool degrades the gaskets rapidly!
2009 Chevrolet Impala - 3.4L V6 134,000 mi,
dealer says I need new upper intake manifold gaskets to cost around $900. Is there a recall on this?
2004 Chevrolet Impala - 3.8L V6 108,000 mi,
Lower intake manifold gasket is leaking antifreeze and needed to be replaced, also an oil change and some hoses replaced as a result.
2008 Chevrolet Impala - 3.9L V6 82,000 mi,
Engine oil leaking onto my garage floor. Reported it at the dealer and was told it was the Oil Pan gasket ($600 to fix!). When car was in the shop, I was called and told it was the Lower Intake Manifold gasket!!! ($$$), am not very happy....
GM should have issued a recalled but i just their cost would have been too much since so many cars have the same problem
My intake manifokd is leaking engine oil and coolant I just read a recall on this and a year or so ago my engine caught on fire I didn't kno about the recall at the time what should I do im having the same problem with this motor
2000 Chevrolet Impala - 3.4L V6 102,000 mi,
Intake manifold leaked into the radiator
2001 Chevrolet Impala - 3.8L V6 198,000 mi,
Constantly losing coolant
Upset , due to started back last summer noticed a wine like the water pump was going out. and puddles under car after it cools off. not alot . After just going through that already with another car, I told the mechanic to replace it I wanted it to be fine for this winter. , 2 months went by still see puddles but rad. and over flow and oil are full.. call him back told him,took it in dropped it off and he stated couldn't find anything, 2weeks still doing it , dropped it back off stated radatior was gone,and its scensor, had thoses replaced and done, and still acting like it was going to over heat, dropped it back off and he stated that he needed to replace the plastic elbows that go into the intake , replaced those, still doing it, drive it and it still doing it told him he needed to replace this water pump that he just put in that something is still wrong.., due to it started to make a sound like it was clicking , Dropped it off yest. NOw states it has compressed lifters, it blow out a glasket on the water pump and the new radaitor I JUST PUT IN and an Intake Leak !
2001 Chevrolet Impala - 3.8L V6 192,000 mi,
I wish I knew before I started to hear the bearing knocking. Now I need another engine.
2003 Chevrolet Impala - 3.4L V6 74,354 mi,
Engine was overheating. Intake manifold gaskets were fried and needed to be replaced. Mechanic said happens all the time on GM's.
2003 Chevrolet Impala - 3.4L V6 183,252 mi,
Smoking left side of motor smell coolant but not running hot... Weird
2002 Chevrolet Impala - 3.8L V6 105,000 mi,
Leaking intake manifold
I have a oil leak coming from my head gasket! The smell is like simething is burning.
2004 Chevrolet Impala - 3.4L V6 160,000 mi,
My son has our old 2004 Impala and recently had problems with it overheating and engine light coming on. Had to keep adding antifreeze. Took it in and they said it was the intake manifold gasket. It's been a great car until now so extremely disappointed as they said it would take around 1k to fix! Now reading all of these posts, I'm frustrated there wasn't a recall on this after happening through so many model years.
2005 Chevrolet Impala - 3.8L V6 137,000 mi,
Inconstantly smell antifreeze when heat goes on and liquid swooshing in the dash board
2003 Chevrolet Impala - 3.8L V6 65,000 mi,
Intake manifold gasket went bad and it leaks oil. I have not yet repaired the problem.
2007 Chevrolet Impala - 3.8L V6 60,000 mi,
My 2007 Impala XL has been leaking coolant since the beginning. Causes a loud CLICKING noise from the dash that is making the dash seperate, lift and crack!!