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98 Park Ave 3800 Rough, Blue Smoke, Radiator Dry, Code P0306 ???

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  • Tom Chandler Jan 15, 2013

    Had bluish smoke when Stopped. Filled Radiator with 50 / 50 .. Code P0306 Remains, Runs Rough but No Smoke ...

  • Tom Chandler Jan 15, 2013

    ALSO .. Checked Oil Level ... Appeared to be Overfull, could have water???

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  • Buick Master
  • 21,873 Answers

Yes, it could all be a leaking head gasket. The coolant could be going into the oil pan and you could be loosing compression thru the gasket.
A mechanic would run a compression test on all 6 cylinders and check for leaks.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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wracefans24
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SOURCE: 98 buick park ave, hard to start, run's rough. po172 code

oxygen sensor in exhaust

Posted on Dec 09, 2009

  • 2 Answers

SOURCE: Engine 3800 for 98 Park

Sounds like your oil pressure sending unit is faulty! When you turn the key on, is the gauge reading low, then you start it and it pegs out? if so, the sending unit has failed.

Posted on Dec 15, 2010

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