bought truck it was used as a daily driver took it apart 10 years ago it was running then but the engine smoked rebuilt last fall checked bearings new rings head was cracked thats what the smoke was rebuilt head motor runs fine other than the oil pressure using gauge in oil line port not the original gauge trying to get it mechanically right before putting body on retired pipefitter most things loose pressure upon heating except steam will torque head and run it again today dont think the spring was altered i didnt and dont remember what it was