Chrysler Pacifica Luxury meets versatility in this mid-sized sport utility vehicle

05 Pacifica Coolant Leak & Not the Waterpump

  #1  
Old 12-16-2017, 09:24 PM
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Default 05 Pacifica Coolant Leak & Not the Waterpump

Hello,

Well I've had a persistent coolant leak and finally tackled the water pump/timing kit today. When I got inside the timing belt housing I expected to see coolant but didn't see any. I went ahead and replaced the pump, belt, pulley and tensioner and put it all back together but I still have a coolant leak. The leak shows up on the front of the middle of the oil pan. Are there O-rings behind the rear timing cover housing that leak? I saw a brief mention of that in a video I watched but wasn't sure if my 05 3.5L had that...I hope not...

Thanks for any and all ideas and help.
 
  #2  
Old 12-17-2017, 07:21 AM
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Location: Somerset N.J.
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Yes there are 3 orings behind the right timing housing that tend to leak as they age.
https://300mclub.org/forums/viewtopi...+housing+seals
This may help.
 
  #3  
Old 12-17-2017, 02:13 PM
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Thank you. Not really excited about this news. Thanks for the link. Any more write up on taking off the cam pulleys? That part seems the most difficult.
 
  #4  
Old 12-18-2017, 05:01 PM
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Location: Somerset N.J.
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Cam drive removal calls for a special tool to retime the drive to the cam. It is not a keyed, fixed location. More like a "D" shaped drive on the cam and a "loose fit" on the cog wheel.
You could approximate the location by centering the cam once the belt is off. It will tent to rest at a center point between the marks on the housing. Mark the exact location of the drive cog to the housing. Remove the bolt ( 10" long) and cog. Remove housing and replace seal rings. At reassembly, "center" the cam, install the cog aligning your mark, torque the bolt to 75'# + 1/4 turn and recheck your results
 
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