When i tried to change engine oil for hero honda splendor 2004 model, i saw two similar nuts under the engine. When i opened one, i got one spring and some oil outside!! so I tried the other one which completely drained the oil. Plz tell me whats the purpose of the first nut if anybody here knows.....

Originally Posted by praJEEP

hai vinfriend
you can find a big nut in the middle .where a 12 13 spanner could fix ( ithink so) u have to loosen it and drain it out. open the bolt and leave it for atleast 45 mins ( actually i leave it for more than a hour).

Thanks prajeep, I found it that time and changed oil, but could you plz tell me the purpose of other nut which when opened i got one spring and some oil out? There was a small metal bush which came out only half ...any way i put all things back and fixed that nut!