Sorry man, I'm not a 4AGE owner but I have a 2010 car that has reached 160,000km already. Your 180,000km is nothing much la. But as a used engine - generally speaking since you don't know the history it's probably a good idea to do a full overhaul. Do your power mods one shot, don't wait until this and that is done before modding. PNP, oversized pistons, forged everything, these are all the internals. Change them all together with your overhaul. I remember seeing your budget to be 20k, that's waaaaay more than enough to do mods and overhaul the engine. You'll need to spend some money on the chassis and suspension. Eg - arms, crossmember bushings, rack bushings, suspension, etc may need changing for super old cars like this.Okay,I'll need confirmation for the questions listed below:
1:Is 180000km on a 4age considered a high mileage engine?How many km will it last before it requires a full overhaul?Hope i can get a rough quote from experienced owners from this thread.By rebuilding I'll do it all at once with valvetrain and cams when all things are set(cooling,drivetrain,footwork on par)which is a long way to go.For now I will steer clear from power upgrades.
GT Auto Sunway is one shop I trust to do mods. Trial tuning specializes in 4AGEs I think. Worth researching them online before you go to them.2:Any recommendation workshops in or within KL?
My 2 cents