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Unread 01-31-2011, 07:53 AM   #1
GreenliftedTJ97
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blown head gasket

My wife has a '03 liberty with the 3.7

It's "missing" antifreeze. Brown sludge in oil filler neck on engine ( water in the oil ). Misfire in Cylinder # 1 and the plug from said cylinder is oddly discolored. So, I'm banking on a blown head gasket. Anyone have any idea how much someone could expect to fix something like that now-a-days? Ballpark?

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Unread 01-31-2011, 08:56 AM   #2
tommudd
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If you look it up a lot of people have problems with some sludge type of junk in the filler neck
Have a pressure check done on the cooling system first and go from there
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Unread 02-01-2011, 03:15 PM   #3
dmblair
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Yeah, that sludge has been in my '05 3.7 since I did the first oil change at 3,000 miles. Freaked me out then talked to some other people about that and they said it was common. Usually it's worse in the colder months. Do you have any antifreeze on your driveway after it's been parked for awhile? How much antifreeze are you missing?
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Unread 02-01-2011, 03:19 PM   #4
tjkj2002
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Quote:
Originally Posted by GreenliftedTJ97 View Post
My wife has a '03 liberty with the 3.7

It's "missing" antifreeze. Brown sludge in oil filler neck on engine ( water in the oil ). Misfire in Cylinder # 1 and the plug from said cylinder is oddly discolored. So, I'm banking on a blown head gasket. Anyone have any idea how much someone could expect to fix something like that now-a-days? Ballpark?
The sludge on the oil filler cap/neck is normal,to many short trips.The leaking coolant I'd be checking the drivers side upper radiator side tank for a hair line crack,most common leak spot and hardly ever leaves a puddle on the ground.The misfire maybe just a bad plug,hence the odd color.Unless your blowing white smoke out the tail pipe it looks like you just have multiple problems all at the same time.
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Unread 02-01-2011, 05:14 PM   #5
50rck
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Also, check your oil dipstick. If that's where you think the coolant is going, it should be very high. When you do an oil change, let some of it fill a glass jar, and see if it separates after a few days. While your at it, check the coolant in the res. It might have oil in it. That is usually the best way to check for a blown head gasket.

Aside from that, I kept loosing coolant in my '91 Wrangler. Every now and then I need to tighten some of my hoses at the radiator and water pump. Might want to check those too, as the other post stated. I never see any coolant on the driveway, it leaks that slow.
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Unread 02-01-2011, 07:48 PM   #6
SGTCornewell
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our radiator had a hair line crack a year ago. the water pump was bad 3 years ago. you might wanna check the weep hole and the really hidden parts of the radiator. we have minimal sludge in the oil cap too. you could also look at every single hose for a soft spot or ANY corrosion indicating a small leak.
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Unread 02-02-2011, 08:41 AM   #7
GreenliftedTJ97
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Sent it out to the garage by me, they did confirm it's got a antifreeze leak in cyls 1 & 2, which mean both heads have to be pulled. Electrode was also burnt off cyl 1's plug, that only had 3000 miles on them. Engine has 91,000 on the clock. He's going to pressure test the heads for cracks. Vehicle has never been overheated or abused ( wife's car ) so that's where we stand now.
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Unread 02-02-2011, 11:10 AM   #8
GreenliftedTJ97
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Well, turns out the heads are garbage. Have to get new ones damn Mercedes engines! LOL
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Unread 02-02-2011, 08:18 PM   #9
tjkj2002
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Quote:
Originally Posted by GreenliftedTJ97 View Post
Well, turns out the heads are garbage. Have to get new ones damn Mercedes engines! LOL
Actually the 3.7 is based off of the 4.7 V8 platform which was originally designed by AMC,not a german design.
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Unread 02-03-2011, 04:19 AM   #10
GreenliftedTJ97
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Quote:
Originally Posted by tjkj2002 View Post
Actually the 3.7 is based off of the 4.7 V8 platform which was originally designed by AMC,not a german design.
I stand corrected then sir thank you for the info. But it's still a crappy engine design.......
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Unread 02-11-2011, 05:12 AM   #11
GreenliftedTJ97
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Ended up replacing both cylinder heads because of them being cracked. Replaced all the extra goodies inbetween. So hopefully everything is cool now No idea want caused it. Never over heated or over rev'd the engine. It has been babied. Oil changed every 3 G's, antifreeze changed every 15 G. Guess it's was just one of those things.
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Unread 02-16-2011, 08:23 PM   #12
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German indeed since Daimler bought out Chrysler. I know from someone who used to work for Mopar that the Liberty shares the same frame as the Mercedes class M. They took out everything that made the Jeep, besides the logo...
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Unread 02-16-2011, 08:50 PM   #13
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Unread 02-16-2011, 09:46 PM   #14
tjkj2002
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Quote:
Originally Posted by Reptile View Post
German indeed since Daimler bought out Chrysler. I know from someone who used to work for Mopar that the Liberty shares the same frame as the Mercedes class M. They took out everything that made the Jeep, besides the logo...
Yeah

Not even close,went wheeling with the Jeep Liberty product manager and what you just stated is totally false.



Oh and I've worked on M class's before and not one this is similiar between a KJ and a M class.
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Unread 02-16-2011, 10:34 PM   #15
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Isn't that funny my mom went from a KJ to a M class a couple of years ago. The Mercedes has been at the shop more in two years than some six odd years with the KJ. I just priced out a replacement diesel for an older G Wagen that was a good deal here $15,000 plus core (I only looked because it has locking diffs) don't want it.
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