Recent content by jsurr

  1. J

    Finding TDC 1986 3 litre GMC

    I am reinstalling my cylinder head. The manual descibes how to set pistons at TDC with the points set to each cylinder and open. I have converted to electronic ignition therfore no points. What is the best way to ensure TDC of each cylinder to properly adjust valve lash? Thanx Jeff
  2. J

    Tips on pulling cylinder head

    While I have my exhaust manilfold off I thought about having my cylinder head rebuilt. I just wanted to throw it out there to get the dos and don'ts from the experts. I found a place that will rebuid it for me all I have to do is bring it in to them. Is it as easy as taking the valve cover off...
  3. J

    How to clean out exhaust manifold?

    I am having an overheating problem with a 1986 3 litre OMC. I pulled my exhaust and exhaust elbow and soaked in CLR, (a commercial house cleaning product used for Calcium, Lime and Rust stains, CLR) I literally got two hand fulls of crap out of them. I called a few machine shops to see if they...
  4. J

    86 3 Liter OMC Overheating

    I have a 1986 3 Liter 140 HP OMC that overheats. It stays 170 to 175 degrees (160 degree thermostat) forever w/rabbit ears and varying RPM. I will run at 2500 to 3000 RPM in the water and it stays the same. Within 10 to 15 minutes of running above 3000 RPM the temp will increase to 250+ if I let...
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