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Diagnosis thoughts/possibilities

Discussion in '1st Gen. Tacomas (1995-2004)' started by gwix1998, Feb 9, 2011.

  1. Feb 9, 2011 at 5:40 PM
    #1
    gwix1998

    gwix1998 [OP] New Member

    Joined:
    Feb 6, 2011
    Member:
    #50629
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    I own a 1996 Tacoma 2.7 4 cyl. 4X4
    2nd owner purchased in 1999, and now have 153K
    on it. No problems whatsoever, other than catalytic converter,
    and usual stuff...brakes, oil changes, starter contacts.
    Great vehicle, and my third Toyota truck.

    The "problem":

    About two weeks ago, had an oil change. Technician indicated that
    radiator flush was in order. Honestly, its probably been 5 years since
    I last did that. The next Saturday morning I noticed "Halloween" orange
    coolant on the drip pans...lots, and the radiator was leaking big time.
    I ordered a radiator, and in the meantime did repeated water flushes of
    the existing radiator and block. After repeated flushed got to a point
    where we had near clear water retuning from the block.
    At no time did we ever overheat, at least according to the gauge.
    Never over 1/2 scale which is where it always runs.
    My son, a Honda tech, installed the new radiator, and I have run a 50
    percent coolant ever since.
    The overflow level is not changing and is stable, so no "drawing" of
    coolant from there if there is internal leakage.
    No "white smoke", or no apparent contamination of the oil in the pan.
    Running 5W-30.

    All three belts also changed at time of radiator installation.
    Vehicle has developed a slight "hum", which I think may be engine
    related. Hum apparent at 60 mph. Also, does not quite have the power as before, but perfectly driveable, and no problem starting. Heater works fine.
    Power issue is very subtle.

    My thoughts:
    Check compression.
    Monitor oil consumption.

    Paranoia here, or really got something going on?
    Likelyhood of subtle head gasket leak?
    I understand that the early 2.7's were not as reliable as 22R or 22RE.

    Opinions please:

    Steve
     
  2. Feb 9, 2011 at 8:19 PM
    #2
    The Munster

    The Munster I like turtles!!!

    Joined:
    Oct 7, 2010
    Member:
    #44355
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    First Name:
    Lance
    Moody AFB, GA
    Sooooo what exactly is the problem, not the same power??? i'd say paranoia. did you use Genuine Toyota Super Long Life Coolant (pink fluid)??
     
  3. Feb 19, 2011 at 6:47 PM
    #3
    timemmons

    timemmons Member

    Joined:
    Jun 25, 2010
    Member:
    #39440
    Messages:
    9
    Gender:
    Male
    First Name:
    Tim
    Tuscaloosa,Alabama
    Vehicle:
    99 Tacoma Prerunner SR5
    I had nearly the exact same problem with my 99 Tacoma 2.7 at 150,000 miles. Turned out to be a blown head gasket. Had nearly no symptoms except for the loss of power and orange coolant. Recommend having a compression check done.
     
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