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Found 1 result

  1. eric240sx
    Bad piston rings or damaged cylinder walls? Recently, I opened a discussion on my excessive oil burning that my rb25det does and thanks to the help of many enthusiasts we concluded that it is bad piston rings or a damaged cylinder wall... or can it be both? Engine had a full upgraded rebuilt 6 months ago with it being bored over .020 over. It has been driven 1000 miles or 1609 kilometers since I have compression tested all my cylinders and it showed a psi of 50-70psi. When I did a wet test it shot up to 120-135psi My rb25det has a 1.5 cosworth head gasket so compression will be lower than normal My hopeful prediction is that the piston rings have seized, been installed improperly, or the rings are worn out. The reason why I don't believe its damaged cylinder walls is because every cylinder shows the same sign of compression loss and piston rings go out together. Cylinder walls are unlikely to all be damaged at the same time What do you guys think?
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