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Thread: Smoke from heater vents

  1. 12-28-2018, 10:22 AM #21
    thilmes
    thilmes is offline
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    Join Date
    Feb 2013
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    65
    Been awhile since I logged in. Thought i would give a final update. did a compression check. found a cylinder that was just slightly lower. pulled engine, removed cam boxes and heads and pulled cylinder that had lower compression. the ring land between two rings was broken but still in place, letting oil through. replaced piston. problem gone!
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  2. 12-30-2018, 02:03 PM #22
    G69
    G69 is offline
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    Jun 2010
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    Garden State
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    Good news!

    I had a persistent leak that I chased for years- It dripped onto the SSI heat exchangers and I'd get so much smoke coming out of the heat and defrost it would condense on the windshield. I dropped the heat exchangers and there was oil in the boxes. Lots!

    I cleaned them with kero, then engine bright, then water based oil eater and it was a different smell for a few hundred miles until they got oil again...

    I was tempted to drill little oil drain holes but determined to find the leak.

    I swore it was rocker shafts but it wasn't. Silicone valve cover gaskets seemed to help. But didn't.

    It was what any novice would check first- 'After years it was the-

    Oil Return Tubes.

    Even when you are positive they are not leaking-
    If you have drips- replace the oil return tube o-rings.

    Oil can sneak out of the tops of those tubes and it is all but invisible.

    Now I drip very little. Very little.
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