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  1. #26
    FEP Super Member gr79's Avatar
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    Yah boy gotta wait until weather warms up here. If i had a garage would be repaired by now.
    Get a few hundred more miles and check the plugs.
    Check compression in all 4 holes again too. It was totally normal last check.
    Will get more seafoam treatments.
    Am fine with a n/a 2.3. Less grief for sure. Simpler is better. Only drive 5k a year now split on 2 vehicles.
    Turbos are costly and this one is hard to work on. Would rather go with a hotter cam for power.
    Pretty sure if still uses oil as a n/a, last resort is a crate engine rather than pull this one apart.
    Prob be a bit less work and downtime. If reparable, would use current engine as spare.
    Goal is to joyride all day or do cruise and car shows again this year.

    Had a lady stop me to chat in Kroger lot the other day when i took it for a short ride to shop.
    Said she used to have one exactly like it and wondered if it was her old car. It is not.
    Last edited by gr79; 04-25-2022 at 10:04 PM.

  2. #27
    FEP Super Member gr79's Avatar
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    Default The fog machine still lives

    Been thinkin' and readin' up search results of 'engine burning oil after warm up'.
    Seems worse once engine is at normal temp. No visible smoke after cold start.

    The first thing will try is freeing up possible stuck oil control rings.
    Makes sense since turbo blew oil into intake big time.
    Then heat coked up the flooded out oil control rings.
    No one cyl is standing out with damage.

    First a Seafoam spray soak, then others as needed. One treat at a time.
    Not really interested in adding anything into the oil or fuel or drastic oil flushes at this time.

    Read about pcv, head gasket issues, pretty much ruling them out for now.
    Car still runs fine, normal startups, no miss, steady vac reading. No detectable blow by.
    When weather breaks, will be pulling spark plugs for a read.
    Last edited by gr79; 04-25-2022 at 10:02 PM.

  3. #28
    FEP Super Member gr79's Avatar
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    Default no more fog machine?

    Haha "Wow - she’s got a drinking problem"
    Drinking and smoking.

    After much thinking, reading:
    Disconnected and plugged the turbo bearing oil return circuit to the oil pan.
    The last link to engine oil and the damaged turbo.
    Was the only other turbo connection (2) to the engine oil system that was still in place. Supply was the other.

    Theory= Engine was sucking up 1-2 oz per mile backwards up the turbo oil return like it was a straw.
    Then past the bad turbo compressor seal, thru the compressor housing, past the wheel, and finally into the intake.
    The turbo does not spin anymore. Draw thru turbo design allows engine to run fine as a n/a with it in place and inop.

    Well, no more smoke clouds at start, idle, after stop and turns, and mid throttle.
    Still some under heavy throttle but that may be residual oil or the oil control rings healing.
    And that amount of smoke is much much less than before.
    It visibly smoked too much just driving around the neighborhood once warmed up.

    Will be driving it close to home 10 miles at a time, extra oil on board.
    No more synthetic or house brands. Now have gone back to using Valv 10w30 conventional like back in the 80's.
    Time will tell and will update to maybe help others with a mystery like this. Why tear down or replace a good engine?
    Is a good sign so far..what? Could the turbo weirdness be gone?
    One repair at a time is best to get a solid go-no go test result with no doubts and obvious result.

    One thing for sure. No more fogging up 6 lanes at once.
    Last edited by gr79; 06-19-2022 at 09:15 PM.

  4. #29
    FEP Super Member gr79's Avatar
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    Haha "Wow - she’s got a drinking problem"
    Drinking and smoking.

    After much thinking, reading:
    Disconnected and plugged the turbo bearing oil return circuit to the oil pan.
    The last link to engine oil and the damaged turbo.
    Was the only other turbo connection (2) to the engine oil system that was still in place. Supply was the other.

    Theory= Engine was sucking up 1-2 oz per mile backwards up the turbo oil return like it was a straw.
    Then past the bad turbo compressor seal, thru the compressor housing, past the wheel, and finally into the intake.
    The turbo does not spin anymore. Draw thru turbo design allows engine to run fine as a n/a with it in place and inop.

    Well, no more smoke clouds at start, idle, after stop and turns, and mid throttle.
    Still some under heavy throttle but that may be residual oil or the oil control rings healing.
    And that amount of smoke is much much less than before.
    It visibly smoked too much just driving around the neighborhood once warmed up.

    Will be driving it close to home 10 miles at a time, extra oil on board.
    No more synthetic or house brands. Now have gone back to using Valv 10w30 conventional like back in the 80's.
    Time will tell and will update to maybe help others with a mystery like this. Why tear down or replace a good engine?
    Is a good sign so far..what? Could the turbo weirdness be gone?
    One repair at a time is best to get a solid go-no go test result with no doubts and obvious result.

    One thing for sure. No more fogging up 6 lanes at once.
    YOUR MESSAGE

  5. #30
    FEP Super Member gr79's Avatar
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    double post

  6. #31
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    Hooray! Mystery solved!
    '85 GT

  7. #32
    FEP Super Member gr79's Avatar
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    Yah am cautiously optimistic. 150 miles since topping off oil is still at the full mark.
    Am checking level every 20 miles. No freeway, hard accell pulls, or long drives yet.
    Engine is running great and louder real mellow twin tip exhaust note with turbo now bypassed.
    Am fine with it as a n/a 2.3. With blueprinted turbo internals, can always do 25 hp nitrous. But why?
    The SVO 2.3 'big' cam sounds bad aze when warming up. Holley 350 working out nicely. Still 20 mpg+.

  8. #33
    FEP Super Member gr79's Avatar
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    Progress report
    Engine is at + 250 miles since repair and oil top off.
    Still at full mark and no smoke at any time. Tailpipes are dry.
    Going to an outdoor swap meet then nearby air show Saturday.
    No freeway driving or over 60 mph just yet. Will be using local surface roads.
    Am gaining confidence all is well internally and can drive a 50 mile trip.
    Yesterday cleaned white deposits from the AWSF 32C s-plugs then regapped all.
    Compression check cold closed throttle 1-160, 2-150, 3-160, 4-165. Normal.

  9. #34
    FEP Super Member gr79's Avatar
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    Update
    2000 mile mark since repair of oil burning issue
    Oil is down less than 1/2 qt.
    Feels good to drive the car anywhere anytime again.
    Not going to replace the turbo. Not worth the issues for what it does.
    Is still installed but is disconnected and does nothing. Engine runs as normal n/a 2.3.
    Starts fine, 21 mpg, no problem merging and keeping up with freeway traffic.

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