Question about 2005 Dodge Ram 1500

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I just realized that my 2005 dodge ram 1500 4.7liter v8 was leaking from the radiator. So i purchased a stop leak and poured it in. i followed the directions and everything...after i took it for a spin i noticed this rough rattle while i was driving. i had my frined look at it and he said it might be a i had my frined do a tune up and said #8 spark plug was not responding and he coulnt do nothing. He told me my best bet is to take to the i did. The associate gave me an diagnostic: replace egnition coil and egr valve. So they did that. So it comes out the the problem is still still drives rough. So the associate recommened to take a look at the engine. But its gonna cost me more. Idk what to do. Plz help

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Sounds like it was overheated in the past due to the low coolant level.
Likely this caused the coil and the diaphragm of the EGR valve.
Heat is the enemy of the engine's emission controls and other parts.
Heat can also destroy the valve seats causing the very problem that you are describing.
The engine likely has some heat damaged parts that when new are
machined to very exacting tolerances.
These tolerances have a habit of getting larger and larger as the engine ages, and experiences things like low coolant level.
Remember, if the radiator had a leak due to corrosion, just imagine what the rest of the components under the hood are like.
Ideally you can try a new rebuilt engine for economic reasons, and/or have the one you own overhauled by a professional engine rebuilder.
This can cost anywhere from $2000 to $3000 and up depending on what it needs.
Good luck to you on this one.

Posted on Jul 10, 2010

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First, stop leak does not stop leaks. It is a quick fix in an emergency, you could have a cracked head or head gasket. If it is missing on that cylinder it could be a bad valve caused from overheating. It is going to have to go to a mechanic, but I would determine my fondness for this particular vehicle because it could be major problems that can lead to catastrophic failure and high repair bills.

Posted on Jul 10, 2010


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