Is it advisable to put an intercooler to a turbo 4D56 engine? i want to know the effects, in terms of engine performance.

What is the question here? What is the car and model? What is the problem? You don't simply add an intercooler and turbo to a non turbo vehicle. The valves in a turbo are different and made for higher heat. The costs are really substantial. If you had warped the head of your current engine, it was probably caused by heat, then you don't want to turbo charge the engine you have. Changing the engine is ridiculous unless you are doing it yourself and have a perfect match. Sell the car and get something faster if that is your problem. But I can tell you the first light you come to will have someone in the other lane with a hotter car than yours... Don't do this to try to make an old car go fast. It is a waste of money and effort.

what car? and year>? and country , so we can look it up in our
great online sources. (all 3 must be known)
in the USA we use alldata.com (or the dealer FSM)

i guess you dont know that some heads are not torqued, or use TTY bolts, right? some are set by ANGLE degree.
that is covered in the FSM all that. the facts.
most head failures result from guessing.
or asking here, with no facts on car.
some engine run different heads, and different if turbo.

case in point, all this Mitsubishi engines

• 8 4D56
  • 8.1 Non-Turbo
  • 8.2 Non-intercooled Turbo
  • 8.3 Non-intercooled Turbo (TD04 Turbo)
  • 8.4 Intercooled Turbo (TD04 water-cooled Turbo)
  • 8.5 Intercooled Turbo (1st Generation DI-D)
  • 8.6 Intercooled Turbo (2nd Generation DI-D)
  • 8.7 Intercooled Turbo (3rd Generation DI-D with variable geometry turbo)
  which one?

my guess
Mitsubishi Triton

Probably, but why would you do this? The 4d56 is 2.5L, the 4m40 is 2.8L, some come with a turbo. You would have a loss of performance, and have all sorts of issues with fabricating bits and pieces to make it fit, plus all the injection and control issues.

this is the quantity and recommended make.DEXRON II D 7.2 LTS

If you have a turbo on this engine then check for loose / blown rubber hoses from the turbo to the intercooler and from the intercooler to the manifold. Check for cracks in the intercooler . I suggest this because the whistling noise is high pressure air escaping and the poor performance results from not having the boost available.

YES, GO AHEAD... OK LANG YAN.. THERE WILL JUST BE A SLIGHT LESS POWER SA NONE TURBO... A GOOD DRIVER CAN ADJUST THE VEHICLE PERFORMANCE ON THE ROAD.

Diar sir,I want convert to left to right hand my pajero 2004 (3.2 model).what can I do. thank you.

4d56 is a diesel engine, fuel, oil, air filter change definitely, regular oil change, check tyre pressure, etc all basic things u can do yourself, after all its no 40+ MPG modern diesel engine its been around for years and years and being used in courier van, pajero and delica, i have a Delica with 4D56 turbo and its loves drinking diesel like no tomorrow, run it on veggie oil like i do you wont worry too much about your fuel consumption.

if the codes on the blocks match each other id say so .