Yesterday i had my exhaust manifold, turbo, oil thermostat, water thermostat and radiator changed... after i left the workshop i realised that my water temp was hitting 3/4 of the stock water temp needle reading... i saw tat my oil temp was close to 100 on my defi.... the next day i went back to my workshop and realise tat the water thermostat wasnt working... so they changed back to the stock thermostat and the water temp was fine but the oil temp still hover around 96-99 degree c and when i whack the car around the temp still stay at 99 but problem is it doesnt go down even if i leave it idling there for sometime... the oil thermostat im currently on is from hks...

 

bad oil thermostat or faulty gauge?

 

nope changed the thermostat afew times alr problem still persist... gonna change the headgasket now...