im running on 660 turbo

and i hv this weird prob

1.when jam..my tempreature go up like 70%
then when running free back,...i goes 2 normal back

2.when o off my aircon..then running,and when my radiator start the fan..tempreature turn up..then goes down like 5 second like tat..it happen every time the fan is on and in off aircon mode

i already service my radiator

and summore,..my deep stick and engine oil cap when open got tiny smoke(open after running)

is tat normal since my engine oil...