I bypass the original cooling line if that's what you're asking.
kalau nk pasang oil engine cooler kena ad adaptor ker?
or same like atf cooler just hose only
Engine oil coolers are the same as ATF oil coolers. The only difference is how they are connected to the car. Engine oil coolers need the oil filter adaptor and people usually use steel braided hoses. For ATF it's fine to just use rubber hoses and no need for adaptors.
It is a very good DIY especially for malaysian weather however my worries are only on oil line and oil cooler,it needs constant care on oil lines and cooler especially on leakage and pressure,as I know the pressure on the lines are more compared while on the gearbox itself so when there is slight leakage it burst out like open wound on the other hand if it is just the gearbox even any oil spill will not effect much as it drips slightly in longer period of time depends on the gasket.Whats ur opinion on this guys?
True! Always check your lines for leakages. Use good quality flexible automotive rubber hoses and use good clamps to hold everything in place.
The pressure isn't enough to make it spurt out like an open tap la. I've experienced a leak and it was because the line was bent and the clamps didn't clamp properly so it leaks like someone who wanted to pee but couldn't and just peed ins his pants.
You should bypass the radiator because the radiator will have less heat load from the trans when its hot and vice versa the radiator will not heat the trans oil up as the radiator temp is usually about 85-90degs. Only problem with bypassing the radiator is that some trans needs to warmup to have smoother shifts without the radiator heating up the trans fluid it will take longer for the trans to warm up. If you decide to not bypass the radiator, install the external cooler after the radiator.
Sifu has spoken! True and truth!
In the case of my Myvi and Wira though, it doesn't need warming up so it works great for me either way. For more advanced cars like the Golf and all, they work differently and usually for cars at that price range, they come with ATF coolers anyway.