what is the main parts of diesel engine to replace to get a perfect power.?

Answer 1

The friction part

Answer 2

Well equipped diesel repair shops have fuel racks to test the fuel injection nozzle spray pattern and injector pump pressure.

It's best to measure the cylinder bores with a dial bore guage and determine if a slight bore (oversized pistons) and final hone (ring manufactures pattern and finish) job is nevessary. The heads should be checked for flatness and re-machined if necessary.
The block decks can me cut to be absolutely sure the pistons all rise to the top of the cylinder within the manufactures specification. The big ends of the rods should be reconditiond complete with new SPS rod bolts. There are many types of bearings avalable today but some sre more suited when the motor oil gets sulfated from the diesel fuel blow-by.

The turbocharger bearings should be checked as well as the manifolding. The innercooler should be free of water contamination build -up.
The freeze plugs should be kicked out and block hot-tanked before machining.
The cam bearings should be removed and the cam should be carefully inspected and replaced if necessary. The crankcase oil pump should be taken apart inspected and replaced if need be.

Your this far along it would be adviseable to have the rotating assembly balanced. Although a diesel isn't a high RPM motor internal vibration would be kept to a minimum
Finally a complete valve job should be done making sure the guides and springs are within specification.

Diesels respond to a great amount of TLC (tender loving care). Fuel, air / oil bath, crankcase oil and oil filtration will make them live a long happy life.

Answer 3

You really dont have to replace anything to get perfect power. You only replace those items which are beyond salvage. However, to set up your engine nicely, you need to ensure that your fuel pump and the injectors are in prime condition. Most of the time, these two are the contributory factors in an engine which does not deliver optimum power This job is best left to the fuel shop boys.

Other contributory factors in a power loss situation could be the piston rings, valves and/or the timing of the injectors.

Try the above sequence and you may not need replacing a lot of parts.

Answer 4

first of all get your fuel injection equipment checked by a competent diesel center . secondly , you need to get your engines Valves replaced/checked .. then you might have to replace the cylinders piston if its worn out . .best of luck
..

Answer 5

upgrade your pistons and piston rings, check your vacum hoses for leaks, upgrade to a K&N filter, and if its in your budget, have it intercooled and turbo charged.