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Discussion Starter #1
I recently bought an 06 Commander 4.7 to use to haul some light weight stuff back and forth. The guy I bought it from was a mechanic, whom had been working on this Jeep outside of work and didn't have a garage. There's a long back story with him, but buying it I had the knowledge that it had a horrible oil leak and that it was probably the air intake manifold.

Bought the Jeep, switched out the air intake mani and found the original to be melted and culprit of the oil leak. After a successful swap, I thought I was in the clear but soon found other issues that I'm not sure I want to get into.

Upon starting, I let it idle for a while and it smoked but that was mainly burning off spilled oil from the manifold leak. Eventually that came to a stop, but I discovered white smoke coming from the exhaust... which from what I've read, isn't a good sign.

On top of that, it wants to over heat. At idle or driving. I don't know how involved I want to get in trying to fix this issue. Off of the top of my head it could be the thermostat or water pump, yet I don't know.

The Jeep is in great shape bodywise, and it runs and drives, which make me hate to get rid of it. Yet are these issues worth diving into when I'm not trying to put too much money into it to begin with? Does anyone have any ideas on what I could do?
 

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I recently bought an 06 Commander 4.7 to use to haul some light weight stuff back and forth. The guy I bought it from was a mechanic, whom had been working on this Jeep outside of work and didn't have a garage. There's a long back story with him, but buying it I had the knowledge that it had a horrible oil leak and that it was probably the air intake manifold.

Bought the Jeep, switched out the air intake mani and found the original to be melted and culprit of the oil leak. After a successful swap, I thought I was in the clear but soon found other issues that I'm not sure I want to get into.

Upon starting, I let it idle for a while and it smoked but that was mainly burning off spilled oil from the manifold leak. Eventually that came to a stop, but I discovered white smoke coming from the exhaust... which from what I've read, isn't a good sign.

On top of that, it wants to over heat. At idle or driving. I don't know how involved I want to get in trying to fix this issue. Off of the top of my head it could be the thermostat or water pump, yet I don't know.

The Jeep is in great shape bodywise, and it runs and drives, which make me hate to get rid of it. Yet are these issues worth diving into when I'm not trying to put too much money into it to begin with? Does anyone have any ideas on what I could do?
I'm trying to keep my cool here - because I was about 10 seconds away from deleting your post @Whwm01; I absolutely can't stand when people register for an account here, so they can start posting questions about all of their problems - and they even don't bother taking the time to read anything that THEY SHOULD HAVE READ before making their 1st post - especially considering the fact that you created your account 4 days ago - and still didn't bother to read any of the required reading before you started posting.

So that being said, PLEASE READ the following and RESPOND ACCORDINGLY - you can start by completely filling out your user profile - and that will reduce the amount of questions that me - or anybody else who is going to respond to this thread - will have to ask you.

And for the record - you are not off to a great start here.

REQUIRED READING!!! Mandatory New Member Profile questions that MUST be answered.

REQUIRED READING!!! New Member Introduction post & other important new member info.

Please follow the forum rules - they exist for a reason.

Thanks. Big Blue; Forum Moderator
 

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Discussion Starter #3
New member - 4.7

Hi, my name's Ben. I recently bought a 2006 Commander 4.7 2wd. Previous owner was a mechanic whom rebuilt the motor due to an overheat from the owner before him. When finished rebuilding, he discovered a bad oil leak, didn't have a personal garage to work on it while Pittsburgh faced a brutal winter. He got fed up, and sold.

I fixed the oil leak ( melted air intake manifold ) then discovered overheating and white smoke from exhaust.
 

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Hi, my name's Ben. I recently bought a 2006 Commander 4.7 2wd. Previous owner was a mechanic whom rebuilt the motor due to an overheat from the owner before him. When finished rebuilding, he discovered a bad oil leak, didn't have a personal garage to work on it while Pittsburgh faced a brutal winter. He got fed up, and sold.

I fixed the oil leak ( melted air intake manifold ) then discovered overheating and white smoke from exhaust.
Ben welcome to the forum, I'm going to merge your other thread with this one - and then I'll try and answer some of your questions.

O.K. now that that's done, here we go.

White smoke coming from the exhaust is usually a sign of worn piston rings - which happens on higher mileage engines, although your mileage is not THAT high, so, I'm a little surprised you are seeing this already - this could also be a sign that your engine was not maintained that well over the years, IE not having the oil changed every 3,000 miles etc.

The worst case scenario would be that you have a cracked cylinder head - or a cracked engine block which could also be the result of the engine overheating on previous occasions - possibly prior to you buying it. If this turns out to be the case, your only option would be to replace the motor or the cylinder heads, whichever is cracked - or sell it as is and try & cut your losses.

The overheating could be caused by a number of things - bad water pump, a cracked radiator, a bad cooling fan - or it could be something as simple as a bad thermostat that needs to be replaced which is very minor.

Here are a couple of questions for you - are you seeing any DTC's (diagnostic trouble codes) being generated in the EVIC (Electronic vehicle information console)?

Have you noticed if you are leaking any coolant at all? Have you had to add coolant to your radiator or overflow tank recently?
 

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Discussion Starter #7
I haven't notice any leaks since fixing the oil leak, and there hasn't been any lights that have come on the dash. I really haven't been able to drive it far with this overheating issue, so I was hoping to maybe fix that and see what happens with the smoke after? I'm not sure if that's the greatest idea though
 

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I haven't notice any leaks since fixing the oil leak, and there hasn't been any lights that have come on the dash. I really haven't been able to drive it far with this overheating issue, so I was hoping to maybe fix that and see what happens with the smoke after? I'm not sure if that's the greatest idea though
A DTC is not a light necessarily, it's a code that you should see in your EVIC - like P0300 for example.

You can read more about DTC's here:

http://www.jeepcommander.com/forums/58-diagnostic-trouble-codes-dtc/

Honestly Ben, I think the best thing you can do right now is get your Commander into a reputable Jeep/Chrysler dealership and spend the $120.00 to have a full diagnostics check done - let them pull and read whatever DT Codes that have been generated, that you're not seeing.

That will probably give you a real good indication of exactly what the problem is - and if it's worth putting the money into it to fix it or not.
 

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Discussion Starter #9
I may have to give that a shot unfortunately. I may call the previous owner and ask him exactly what he did so I have a better idea. Also for starts would you suggest me doing a coolant flush and replace the thermostat to see if that helps the overheating issue? The coolant looks like a mustard color right now which has me thinking that wouldn't be a bad way to start.
 

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I may have to give that a shot unfortunately. I may call the previous owner and ask him exactly what he did so I have a better idea. Also for starts would you suggest me doing a coolant flush and replace the thermostat to see if that helps the overheating issue? The coolant looks like a mustard color right now which has me thinking that wouldn't be a bad way to start.
That's definitely a good first step. Take care of those two maintenance items and then see where you're at.
 

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Discussion Starter #11
Just started the flush, and as soon as the drain started it was like a bunch of Jello shot out of there. I've never seen that before so I'm thinking that along with the thermostat is playing a good part in the over heat...
 

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Discussion Starter #13
Ended up removing the radiator because it's clogged with God only knows what, main hose from water pump to rad had gunk along with hose from tstat to rad. Once I removed the thermostat the fluid flowed right out of the motor, so I flushed that out good. Going to have to order a new radiator now, but I feel confident this should fix the over heating issue...
 

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If I were you, I would stop where you are and assess the viability of this engine before you put any money into it. The white smoke pouring out of the exhaust could mean some serious problems with the engine, so you would be wise to make sure that the major working components are in order before you worry about the other things. I think a compression check would be a good place to start. This will alert you to things like broken piston rings, in many cases it will detect a bad head gasket and a host of other issues, and is relatively easy to perform.

I'm just gonna go out on a limb here with some wild speculation based on the information you have given. The white smoke pouring out of the exhaust may perhaps signal a bad head gasket, where oil is being allowed into the cylinder. Someone may have tried to put some of that head gasket repair gunk garbage in there to repair it, which may be the gunk that you are seeing in your radiator. That may be what caused your overheating issues, as well as the melted intake manifold due to heat. If the engine got that hot, in my opinion the whole thing is suspect.

Figure out all of these problems and the necessary repairs BEFORE doing ANYTHING! If you've got a bad piston ring, you may be better off finding another engine. See what you've got before you proceed any further.
 

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Discussion Starter #15
I agree. I'm going to try and flush this radiator out today (normally I would just buy a new one). I just want to see how it acts when it is finally cycling coolant. It hasn't been run more than a few minutes to the point where the temp gauge started to exceed midway, so I would like to see exactly how bad the smoke is when I know for certain the excess oil has been burned off.

There was a lot of oil under the motor from the mani leak, but once it's up and running I'll try and test the motor.

On a side note, how hard exactly is it to change out rings or a head gasket? I searched around and couldn't really find a walk through on it. I'm assuming the motor would need to be pulled in order to do it? Or could it be done in place?
 

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Ended up removing the radiator because it's clogged with God only knows what, main hose from water pump to rad had gunk along with hose from tstat to rad. Once I removed the thermostat the fluid flowed right out of the motor, so I flushed that out good. Going to have to order a new radiator now, but I feel confident this should fix the over heating issue...
At the very least, you've definitely found a contributing factor to your problems.

Geez that looks nasty.
 

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With the crap coming out of that engine. You will never get it all out. No matter how many times you flush it. What's really bad , it's got into your HVAC system. And your radiator.Even if you do fix the motor as good as you can. Your motor has all that gunk in it because it already overheated, from a bad head gasket. Or some sort of leak someone tried to fix.
It appears that someone tried to do a patch job on it and get rid of it.

The second problem is with the heads.It has cheap valve seats on the 2006 model. Chrysler had a huge problem with that on the V6 is and the V8. They fixed the problem in 2009. Those bad valve seats allow terrible smoking on startup. Massive cloud of smoke. On Startup.
If you want dependability. I would look into a long block , or price rebuilding the heads and buy a short block.
And whatever you do, by a new radiator. Even if you have to go aftermarket, that's fine.
And also while you have the motor out. Flush out the heater core as best you can before you hook that thing back up to your new engine. Hopefully you don't have a heater in the back also_Once someone puts Stop Leak in an engine. It's almost never the same ever again.
If this is a daily driver. Don't even take chances,do it right.
If this is just a second vehicle for you. Then try to fix one problem at a time, if you want , it's your call. But trying to fix one problem at a time is going to be frustrating. Good luck!

Sent from my Samsung Galaxy, using speech to text
 

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Discussion Starter #18
Somewhat encouraging news? Finished cleaning everything I could coolantwise, put it all back together and drove it up and down my road some. It seemed as though the white smoke stopped and temp stayed in the middle. Then I noticed coolant spilling out and discovered the radiator cap doesn't fit right and it was coming out of there pretty good. So that'll be tomorrow's project...
 

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I agree. I'm going to try and flush this radiator out today (normally I would just buy a new one). I just want to see how it acts when it is finally cycling coolant. It hasn't been run more than a few minutes to the point where the temp gauge started to exceed midway, so I would like to see exactly how bad the smoke is when I know for certain the excess oil has been burned off.

There was a lot of oil under the motor from the mani leak, but once it's up and running I'll try and test the motor.

On a side note, how hard exactly is it to change out rings or a head gasket? I searched around and couldn't really find a walk through on it. I'm assuming the motor would need to be pulled in order to do it? Or could it be done in place?
I still think you should do a compression check on it, and ideally a cylinder leak down test as well, but the leak test requires special tools. You should be able to find a compression tester pretty easily without spending too much money, and that will tell you a lot. That will give you an idea if this engine is worth messing with. If you've got low compression on a cylinder, you could have a bad head gasket, a leaking valve, or a bad set of piston rings. That's where the leak down test could help narrow down the problem.

Regarding your question, if you end up having a bad piston ring, getting a long block or another motor is probably your best bet. The entire engine will need to be pulled and torn down for that job, and there's no guarantee that the block can be saved if the cylinder is damaged bad enough.

If you end up needing to do a head gasket, you MAY be able to leave the engine in the vehicle, but make no mistake, it's a big job! Spend the time and make sure you do indeed have a problem before you go down that road.

Let us know what you find.
 

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Discussion Starter #20
Pretty sure I have a cracked engine block or blown head. I thought all was ok, was letting it warm up and moved it around a few times and then I noticed oil spilling out again. Pulled it back in, removed the air intake manifold and low and behold oil puddled below on top of the block. It almost looks as if he tried to gunk up the seams with gasket maker and then spray painted the top of the block a bronze to hide it. Is there any way to pump up or circulate the oil pressure with the intake manifold off to find a point of leak before throwing the towel in?
 
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