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06 4.7 Multiple Cyclinder Failure - Please Help

3K views 10 replies 6 participants last post by  rblapham 
#1 ·
I am writing this in desperation. I have a 4.7 2006 and the engine radiator fluid had leaked out. When the cluster came on I pulled over and had towed into a repair shop. The radiator was replaced. The vehicle was returned with a DO NOT DRIVE wrote on the window. Engine would barley run!! This vehicle was driven off of the wreck without any issues. Mechanic said the engine would not work now. Said Multiple Cylinder Failure. I have recieved a quote from a repair man and he is stating that the engine needs a valve job.

I need help. This doesn't seem right. Why would this happen and what would be the best way to fix this.

Thank you in advanced for your support and help.

Nick
 
#2 ·
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#8 ·
The heads on these engines are aluminum. My Jeep lost coolant and got a little warm, the light never came on. I found that I had lower compression on one cylinder when I did a compression check. I pulled the head and noticed that those valves were white in color, while the rest were not. I took the head to be checked over for cracks and general condition. All the valves needed replaced in my case and the cylinder head also needed to be resurfaced to make the mating side flat. The head work cost me about $175 from a local guy that had a good reputation from some local hot-rodders and race car guys.

Given that your engine got hot enough to make the light come on, your engine most likely suffered much more damage. There are things to have done to help diagnose the condition of the engine internally. Ask for a cylinder compression test and ask for the numbers. You should get a number for each cylinder. You might even ask for a "dry" and a "wet" cylinder compression test. In that case you get two sets of numbers. Usually the wet numbers will be a little higher.

The water pumps on these engines seem to fail often. I just noticed that mine needs replaced again. I have read that the water pumps sold at some autoparts stores (sorry if I offend any members here) might not be built to the standards that the Mopar water pumps are built to. My water pump was bought from a chain autoparts store and is leaking again after roughly 2 years.

In the end, if you aren't comfortable with this mechanic, get a second opinion. Sorry to hear of your troubles.
 
#11 ·
Probably the Condenser for the AC compressor, which sits in front of the radiator.
 
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