1999 Dodge Caravan

Tiny
DMMD
  • MEMBER
  • 1999 DODGE CARAVAN
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 113,933 MILES
I have a dodge Caravan 1999 113,933 miles, 3.0 v6,
I have a knocking noise around the top of the engine in park with the engine running and while driving also the noise increases with speed of the engine.
The timing belt and water pump were replaced in 04(77.000 Mil.)
Any ideas?
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Wednesday, August 11th, 2010 AT 1:27 AM

9 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
Check engine oil make sure it doesn't smell burnt, look milky or is too low. Also test oil pressure
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Wednesday, August 11th, 2010 AT 1:49 AM
Tiny
DMMD
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The Oil was changed a little over 300 miles ago, it is clear, and at normal level but a little color, a slight green yellow, it just might be the oil, I don't think the oil is synthetic.
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Wednesday, August 11th, 2010 AT 1:31 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
Shouldn't be green colored, seems like you may have internal coolant leak, coolant mixing with the oil. Check the coolant level ensure it is not draining any.
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Wednesday, August 11th, 2010 AT 1:41 PM
Tiny
DMMD
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The coolant level is a little low, not loseing it from block, the engine is not heating up beyond the norm, in fact I just drive it for nearly 130 miles with no problems other then the knocking noise.
If it's an internal coolant leak, how extensive is the repair and much do you think going to cost me?
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Wednesday, August 11th, 2010 AT 11:13 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
Depends on exactly what is leaking. Easy check for this though is to remove radiator cap (WHEN COLD), then start engine and rev up a bit. If coolant blows up out of radiator cap opening there is definitely an internal coolant leak issue.
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Wednesday, August 11th, 2010 AT 11:15 PM
Tiny
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I will try your suggestion first thing in the morning and I will let you know the results.
Thank you for your help.
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Wednesday, August 11th, 2010 AT 11:33 PM
Tiny
DMMD
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I did what you said, removed the radiator cap (on the cold engine) then started it and revved up the rpm and held the pedal down for a short time. With no bubbling anti-freeze coming out of the radiator to me good news.
What else should I try?
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Thursday, August 12th, 2010 AT 9:27 AM
Tiny
BLUELIGHTNIN6
  • EXPERT
Okay well it's most likely not a cracked head gasket or head then. It could just be condensation that turned the engine oil a bit yellowish/greenish. That oil will need to be replaced though, it does not have its full features to lubricate properly since something has mixed into it. The PCV system is supposed to prevent the condensation mixing into the oil, so after replacing the oil it happens again, you might want to replace the PCV valve.
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Thursday, August 12th, 2010 AT 5:59 PM
Tiny
DMMD
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Ounce again I'm Very grateful for your help and Guidance with this issue, I have an appointment next week to have the pcv valve checked and if need be replaced.
Thanks again you are awesome.
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Thursday, August 12th, 2010 AT 10:48 PM

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