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Unread 08-04-2008, 09:30 PM   #1
jeepmama1
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2004 Jeep Liberty w/ bad intake valves

I have a 2004 Jeep Liberty 6 cyl. I have not had any problems with the vehicle. After driving to camp and leaving the vehicle sitting for a week I noticed a white steam from the exhaust upon starting the car. The car was under 1/4 tank of gas and the week was warm during the days and fairly cool at night. After finding no apparent cause, I thought it might be condensation. The car drove fine all the way home. Within the next few days I had more white steam from the exhaust upon starting it, it began to misfire when going uphill as the vehicle approached 25-40 mph, and the check engine light came on. When I took it to the dealer I was told all 6 intake valves needed to be replaced. Any ideas what would cause all 6 to fail at the same time, or do I need to find another mechanic?

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Unread 08-04-2008, 09:47 PM   #2
jeepjeepster
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Find another mechanic to check it out unless its still under the power train warranty. Its not likely at all that all 6 valves would need to be replaced.

Is the coolant low at all? Did they check the compression? How many miles?
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Unread 08-04-2008, 11:01 PM   #3
richd
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Are you sure it didn't overheat?I had this happen at work,and it melted the valves,but it was driven about 30 miles on H.
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Unread 08-05-2008, 04:36 AM   #4
LoneLiberty
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Are you sure they didn't say valve springs? I've heard some reports of valve springs breaking at around 100,000 miles.

Regardless, you should be covered under the 7 yr./70,000 mile warranty if it hasn't expired yet.
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Unread 08-05-2008, 08:17 AM   #5
jeepmama1
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No, it is definitely the valves all 6. As far as I know, it did not overheat. The temp. gauge never went above the halfway mark. It was low on coolant, but after adding some the level has not changed at all. The mechanics are trying to tell us that it was bad gas, or water in the gas that caused the valves to fail. They warned us about not putting any dry gas into the system as that could cause engine damage or blow out the catalytic convertor. Still sounds funny to me. I wouldn't think you would be able to drive the car at all if all 6 intake valves were bad.
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Unread 08-05-2008, 08:19 AM   #6
jeepmama1
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They didn't check the compression, just scanned the engine. The jeep has about 79,000 miles on it, so it is out of warranty.
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Unread 08-05-2008, 08:37 AM   #7
LoneLiberty
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Quote:
Originally Posted by jeepmama1 View Post
They didn't check the compression, just scanned the engine. The jeep has about 79,000 miles on it, so it is out of warranty.
Since it's out of warranty, I would take it to a trusted mechanic for any further evaluation.
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Unread 08-05-2008, 02:00 PM   #8
richd
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Quote:
Originally Posted by jeepmama1 View Post
I have a 2004 Jeep Liberty 6 cyl. I have not had any problems with the vehicle. After driving to camp and leaving the vehicle sitting for a week I noticed a white steam from the exhaust upon starting the car. The car was under 1/4 tank of gas and the week was warm during the days and fairly cool at night. After finding no apparent cause, I thought it might be condensation. The car drove fine all the way home. Within the next few days I had more white steam from the exhaust upon starting it, it began to misfire when going uphill as the vehicle approached 25-40 mph, and the check engine light came on. When I took it to the dealer I was told all 6 intake valves needed to be replaced. Any ideas what would cause all 6 to fail at the same time, or do I need to find another mechanic?
This also sounds like a bad head gasket.I never heard of bad gas,or water burning valves.
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Unread 08-05-2008, 07:31 PM   #9
jeepjeepster
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If they only pulled the codes then they have no way of knowing what the problem is. It may of said 'low compression' but it could be other things. Either way, water in the gas wont cause 6 valves to kick the bucket.

Get far away from a dealer anyway if its not under warranty. They are pro's at charging to much.

By 'dry gas' I take it you mean a water remover or a fuel injector cleaner? Ive never heard of that harming a cat. Ive used valvoline injector cleaner many times with no issues.

As longliberty said, valve springs have been known to break on higher mileage 3.7's.
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Unread 08-05-2008, 08:02 PM   #10
EagleStorm
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If they just scaned it go to someone else could be head gasket if all intake valves were bad it could be poping out the intake all cyls would be missing water taking out the valves is a new one you can use water to remove the carbon on the valves We use inj cleaner says mopar on the bottle Its really top eng cleaner and we put a additive in the tank did you have sucker stamped on you some where? lol run from them run fast before the crap gets on your shoes
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Unread 08-06-2008, 07:01 PM   #11
jeepjeepster
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Quote:
Originally Posted by EagleStorm View Post
If they just scaned it go to someone else could be head gasket if all intake valves were bad it could be poping out the intake all cyls would be missing water taking out the valves is a new one you can use water to remove the carbon on the valves We use inj cleaner says mopar on the bottle Its really top eng cleaner and we put a additive in the tank did you have sucker stamped on you some where? lol run from them run fast before the crap gets on your shoes
May want to use some periods and commons to spice that up some.
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Unread 08-06-2008, 07:17 PM   #12
EagleStorm
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na I just run every thing together If I want all that stuff I let my wife type it lol
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