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Looking for a TR6 mechanic/guru in SE Florida

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  • #16
    If the rest look like #5 in the picture, that's fine...Pictures like that can be deceiving due to dispersed lighting.
    There is hope for that low compression by using detergents... if it's a sticky (not burned) valve...
    Back in '07 when doing a compression test on my 'new to me' 74 TR6 I found a low cylinder 112 psi.
    A vacuum gauge indicated that I was dealing with a sticky valve....fortunately not a burned valve.
    https://therangerstation.com/Magazin...acuumLeaks.htm
    http://automotivemileposts.com/garage/v2n8.html
    I started adding Techron to the gas in addition to using Shell gas also with Techron out of the pump...I also started driving the car a bit hard when conditions allowed ....I didn't check the compression again for a little over 4 months and 2000 miles later...but the combination of detergents and spirited driving raised the compression in that cylinder to 145 psi...
    In fact the compression in all those cylinders rose from an average of 133 to an average of 145.
    Last edited by poolboy; 12-29-2018, 10:59 PM.
    Driving a 1973 TR6
    Doing ZS carb repairs
    email kencorsaw"at"aol.com

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    • #17
      Originally posted by poolboy View Post
      If the rest look like #5 in the picture, that's fine...Pictures like that can be deceiving due to dispersed lighting.
      There is hope for that low compression by using detergents... if it's a sticky (not burned) valve...
      Back in '07 when doing a compression test on my 'new to me' 74 TR6 I found a low cylinder 112 psi.
      A vacuum gauge indicated that I was dealing with a sticky valve....fortunately not a burned valve.
      https://therangerstation.com/Magazin...acuumLeaks.htm
      http://automotivemileposts.com/garage/v2n8.html
      I started adding Techron to the gas in addition to using Shell gas also with Techron out of the pump...I also started driving the car a bit hard when conditions allowed ....I didn't check the compression again for a little over 4 months and 2000 miles later...but the combination of detergents and spirited driving raised the compression in that cylinder to 145 psi...
      In fact the compression in all those cylinders rose from an average of 133 to an average of 145.
      Glad to hear it, and good info. thanks for your help poolboy.

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