Шайба пружинная(гровер) предотвращает отвинчивание и изготовленна из нержавеющей стали а2. Подробности на сайте https://ph2.by/
Once the crank pulley was removed, I was able to remove the lower timing belt cover. Then I made sure all the cam and crank gear marks all lined up. Then I removed the tensioner pulley and bolt. Then I remove the timing belt, starting at the water pump and moving counter clockwise, hang on to the belt to avoid an unexpected jump of the cam gear on the front bank. I remove the second idler pulley for the timing belt on the right, as well as, the two block off plates on the heads.
ALWAYS replace the tensioner bolt, washer, and lock washer. Lock washers should not be reused.
Follow all the torque specs in the manual. Take note of the different bolt lengths for the water pump and the timing belt cover.
Sealer is not to used anywhere. Only use OEM Mitsubishi gaskets and parts.