Overheating Issue with 2004 Dodge Intrepid SE 2.7L Engine - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
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post #1 of 45 (permalink) Old 11-01-2011, 11:18 AM Thread Starter
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Overheating Issue with 2004 Dodge Intrepid SE 2.7L Engine



I'm having an overheating issue with my intrepid, but I'm going to give a little maintainance background before I go into that.

The intrepid was my mom's old car, it started to blow freeze plugs and loose antifreeze in march 2011, replaced the freeze plug and refilled the coolant. A few days later another freeze plug in the back of the engine blew, she got frustrated with the car and brought another one, she worked about 40-50miles from the house so she needed reliable transportation.

She gave me the car and I got it fixed in june 2011, come to find out a bad water pump was causing the freeze plugs to blow. So my mechanic in June 2011 replaced all the freeze plugs and water pump. Car ran fine.

August 2011 I notice that I'm loosing coolant from the very front of my car, took a flashlight and looked in the area of the radiator and it was cracked on one side. So in August 2011 my mechanic replaced my radiator. Car ran well again.

In Sept. 2011 on my way home one day the car overheats out of nowhere. I pull over and call my mechanic and he said let it cool off and get it home I was like 5 mins from my house. Before I called him when I lifted the hood all coolant was in the overflow tank and boiling over, so I was smelling the sweet smell of coolant. I proceeded to let it cool off and try to get it home, it took no more than 3-7mins for it to overheat again while I was trying to get it home. This all happened on a Friday.

That following Monday my mechanic tries to troubleshoot why the car is overheating. He was bleeding the coolant system and a lot of air was coming out, he also test drove it and it kept overheating,and at this point he thinks it could be a bad thermostat The next day tuesday he comes back to replace the thermostat. test drives it and it still overheats. After test driving it 4 times he comes to the conclusion that the head gasket it blown. Although I didn't have white smoke and milky chocolate oil, combustion gases were restricting my coolant from flowing properly.


Fast forward to October 10, 2011, my mechanic has my car towed to his garage to fix head gasket issue, tune-up, and a bad timing chain tensioner. He was going to return the car to me yesterday but on his way the car overheated.


What's going on. I'm pretty frustrated. I feel as though the car shouldn't have any reason to continue to overheat.


Things Replaced:

June 2011
-water pump and freeze plugs
August 2011
-new radiator and battery
Sept 2011
-new thermostat
Oct 2011
- head gasket repair
-tune up(spark plugs, pcv valve, air filter, oil, coolant)
-New timing chain tensioner


Things Not Replaced:

-radiator cap(never been replaced according to my knowledge)
-radiator hoses( one if not both hoses have been replaced before when my mother was driving the car)

I will keep this post up to date cause my mechanic still has my car.
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post #2 of 45 (permalink) Old 11-01-2011, 11:25 AM
That rhythm is INFECTIOUS.


 
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Uh - could very well be the overflow tank cap - not uncommon for it to fail to hold pressure due to fatigue. Cheap to replace. And yes, if it's not holding pressure, can cause temps to rise.
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post #3 of 45 (permalink) Old 11-01-2011, 11:30 AM Thread Starter
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Before I even had the car serviced for the head gasket repair, I thought about going to autozone to get a new radiator cap, but I figured I would allow the mechanic to do his thing so i never got the cap. Now I wondering should I suggest that to him. I have definitely heard about the radiator cap causing the overheating issue.
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post #4 of 45 (permalink) Old 11-01-2011, 12:07 PM
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yup i've had a bad radiator cap cause all that grief before.
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post #5 of 45 (permalink) Old 11-01-2011, 12:25 PM
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I also have suffered from the bad coolant cap.

$200 later i found the issue lol.
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post #6 of 45 (permalink) Old 11-01-2011, 01:26 PM Thread Starter
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So, I just got word from my mechanic and he's already replaced the radiator cap!!! So this is worst then trying to solve a cold case. Any suggestions of what can be keeping the car overheating.
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post #7 of 45 (permalink) Old 11-01-2011, 08:29 PM
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Quote:
Originally Posted by Biograd1 View Post
...come to find out a bad water pump was causing the freeze plugs to blow...
That statement kind of puzzled me. But that's neither here nor there.

It's about to the point that you need to consider that maybe a bad part that was replaced was replaced with a bad new part - that definitely can happen. Thermostat is a good candidate for that (should have been tested before installing) - maybe water pump too. Or a passage is clogged. Time to start the basic troubleshooting process all over again.
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post #8 of 45 (permalink) Old 11-01-2011, 09:24 PM
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Did they put the head gaskets in backwards/upside down??
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post #9 of 45 (permalink) Old 11-01-2011, 09:41 PM
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Quote:
Originally Posted by Biograd1 View Post
So, I just got word from my mechanic and he's already replaced the radiator cap!!! So this is worst then trying to solve a cold case. Any suggestions of what can be keeping the car overheating.
I'm sorry bud but time may have pasted where it's time to replace your mechanic.....being a person that has overhauled as many 2.7's as I have.....your mechanic has gone wrong somewhere in the process of overhauling your motor and messed something up important or over looked an important part or process.....maybe he forgot to plain the heads when doing the head gaskets in that case it's like having another blown headgasket.

for grins I hoping he's ruled out all the easy stuff 1st but in the process of where your at I don't think your mechanic knows what he's doing and has cost you a lot of money......I hate hearing about these kinda stories.
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post #10 of 45 (permalink) Old 11-01-2011, 09:55 PM Thread Starter
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I think he misdiagnosed my head gasket issue, he didn't perform a leak down test to validate that their were combustion gases mixed in with the coolant(well at least not in my presence). After replacing the thermo, water pump, and radiator you would think head gasket/head gasket leak cause it continued to overheat. I didn't have oil mixed in with water or oil, no white smoke out the tailpipe, so I wasn't sure if the head gasket was bad! but I've heard that you will not always get those symptoms in a blown head gasket.
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post #11 of 45 (permalink) Old 11-01-2011, 09:59 PM Thread Starter
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In regards with the mechanic he's worked on the car ever since it was bought in 2004, he's even corrected problems the dealership did in regards to the alternator and fusible link. So, at this point I only trust him with the car and have head nightmares with sears and firestone just trying to install a battery. I think he's made mistakes in this particular situation though, but he has no problem correcting his own problem without extra money.
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post #12 of 45 (permalink) Old 11-01-2011, 10:06 PM Thread Starter
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In regards to the water pump, it was replaced first, then two months later the radiator cracked and had to be replaced, could that cracked radiator cause the water pump to prematurely fail?

water pump replacement history on my car

factory was replaced about two years ago(the factory was leaking through the weep hole so obviously had to be replaced, brought an after-market water pump to replace it)

that after-market water pump was the one replaced this year in June, but it didn't leak like the original factory it just blew freeze plugs and after replacing all the freeze plugs my mechanic found that the water pump needed replacing.

I think it's odd that the water pump didn't leak like they normally do when they go bad. Could I have a faulty water pump????
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post #13 of 45 (permalink) Old 11-01-2011, 10:08 PM Thread Starter
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Before the head gaskets were replaced they were machined and inspected at a machine shop, so it wasn't like he took the old head gaskets off and put new ones in with warped heads.
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post #14 of 45 (permalink) Old 11-01-2011, 10:09 PM Thread Starter
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Quote:
Originally Posted by mnitetrain View Post
Did they put the head gaskets in backwards/upside down??
I can't really test for that cause my mechanic still has the car and is troubleshooting what is causing the overheating issues.
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post #15 of 45 (permalink) Old 11-01-2011, 10:14 PM Thread Starter
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Quote:
Originally Posted by peva View Post
That statement kind of puzzled me. But that's neither here nor there.

It's about to the point that you need to consider that maybe a bad part that was replaced was replaced with a bad new part - that definitely can happen. Thermostat is a good candidate for that (should have been tested before installing) - maybe water pump too. Or a passage is clogged. Time to start the basic troubleshooting process all over again.

He is looking at the thermostat and water pump as culprits especially the water pump. In fact he's looking at all the components of the coolant system for possible causes.
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