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I need a 5.7 Hemi guru

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7.3K views 10 replies 5 participants last post by  DRW60  
M
#1 ·
My brother is the almost proud owner of a 2006 Chrysler 300 AWD with a 5.7 Hemi.  He has a much mechanical knowledge as a rock, ok the rock has more.  The car over heated a couple of weeks ago and someone told him he needed a new engine.  I went down the 200 miles to his house over the weekend and gave him my car to drive and brought his back to work on for him.  I have found several issues that concern me but I don't no which way to proceed to fix it.

A)  The cooling fans will not come on even when using a scanner to force them on; changed relays around to see if one of them was bad and still no fans.  They turn freely when I spin them by hand, did conductivity test and that seemed to be correct but I'm not 100%.

B)  Idles extremely rough, plugs look like it is running rather rich and smokes a white cloud.  Took it on a drive and fogged for mosquitoes really bad when taking off.  But clear up around 1500 rpm or so.  Then if you open it up a little it is like my old big block that puffed on throttle. 

C)  The air filter housing has a fair amount of oil in it, not like a ton but enough the filter is very heavy.  The port on the side of the filter box seems to have good suction into the crank case so I don't know if the oil is coming out of the intake and being sucked into the box or what.

So far I am going to replace the air filter and change the oil, then get the computer reflashed to have a base line on things to see if anything changes.  If anyone has suggestions it would be greatly appreciated I don't mind tearing into it if I have an idea of what I'm looking for. 

Carbs and points were so much easier to work on.
 
#3 ·
Vehicle:  2006 - 2006 Chrysler 300 2.7L
  2006 - 2006 Chrysler 300 3.5L
  2006 - 2006 Chrysler 300 5.7L
  2006 - 2006 Chrysler 300 6.1L



Symptom:  Engine overheating, poor air conditioning performance. Cooling fans not working. 



System:  Body/Chassis Electrical, Engine Cooling, Heater/AC 



Codes:  N/A 



Problem:  Failed cooling fan motor. 



Test & Fix:  Disconnect the 4 wire connector for the fan assembly. Two wires go to the passenger side fan motor and 2 wires go to the drivers side fan motor. Using two jumper wires, apply 12 volts and ground to each fan motor to test. Note: When performing this test if the polarity is incorrect the fan will run backwards. If this is the case, simply reverse the jumper wire leads. If one or both fans motors fail to operate, replace the fan motor assembly.
 
#4 ·
How's the coolant level? Isn't white smoke a sign of coolant leaking into the combustion chambers? If so, maybe he overheated it if the fans weren't working and smoked the engine.
 
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#6 ·
Heinrich_Ram said:
id say cracked/warped heads or blown gaskets if it smokin white, do the 5.7 HEMI's have aluminum heads?
Click to expand...
X2

I think they do have alumunim heads

Chris
 
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M
#8 ·
It has gotten hot twice but not using a drop of coolant or at least not proportional to the amount of smoke it is producing.  The only codes it has kicked P175 and P172 which shows it running rich.   One other thing I have read on the internet is that the intakes sometimes leak, has anyone heard about that?
 
#9 ·
Just a random thought, what's the oil level and consumption like? All this smoke would indicate it's burning it, but then there was oil in the air box. Could there have been too much oil? Can't that effect idle and fuel economy?
 
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#10 ·
Mopar70chall said:
It has gotten hot twice but not using a drop of coolant or at least not proportional to the amount of smoke it is producing. The only codes it has kicked P175 and P172 which shows it running rich. One other thing I have read on the internet is that the intakes sometimes leak, has anyone heard about that?
Click to expand...
It doesn't take much coolant to blow a huge amount of smoke. The 89 T-bird I had didn't use much coolant either but always had enough smoke behind it so you couldn't see through it. It had one small break in a head gasket.

Chris
 
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