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valve lapping

  1. VT_4G63

    Air heard escaping through both manifolds when pressure applied to cylinder - need help/advice

    I am finishing up my build and getting ready to degree my cams in the engine from my 96 Spyder GST. I am in the process of swapping in checking springs to do so. My engine is on a stand with no cams or timing belt installed.However, when I apply air pressure to the cylinders through the spark...
  2. 1990TSIAWDTALON

    Vacuum checking your valve sealing before a head install

    I made a vacuum testing rig to check the sealing on valves of various cylinder heads so I want to share it with the group. This one will check 4g63 heads and I checked it on an LS Chevy head and it will work on those too so I figure it will work, as I made it, on most heads. I included a list of...
  3. VT_4G63

    Looking for Opinions on these Valve Sealing Results

    Hi guys,I’m looking for opinions on how to move forward with my build.I have my engine completely disassembled for a refresh (timing, water pump, gaskets, seals, upgrades, etc.). I have the head apart and am up-grading lifters, cams, valve seals, springs, etc. etc.I have cleaned the valve...
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