How To VALVE stem SEAL replace WITHOUT engine HEAD remove? If you engine loose oil and exhaust white smoke your valve stem seals is ready for replacement. In our video you can saw how to replace valve stem seals step by step. Don t need remove engine head. You need universal tool and air compressor. From start to finish replacement operation air pressure must be stable (2.5 Bar). Be carefully, don t loose or drop small parts in engine. After valve stem seals replacement engine stop loosing oil and exhaust white smoke gone. Do it same procedure for rest valve seal stems. Engine from Peugeot 207 1.6 THP 175hp.