THAT WOULD BE CORRECT TO DO FOR A LOT OF DSL ENGINES INCLUDING THE ISUZU DSL, THEY ARE DESIGNED TO BE PRESSED IN BY A SPECIAL TOOL AND THOSE SEALS DONT COST 20.00 DOLLARS , MORE LIKE 80.00 AND THEY ARE NOT A DOUBLE LIP SEAL LIKE THE RUBBER SEALS THAT ARE DESIGNED TO BE DRIVEN IN, THAT IS WHY THEY MAKE SEAL DRIVERS , BUT PRESSING IT IN WONT HURT IT AT ALL.IF YOU HAVE A PRESS . JERRY