Rebore and resleeve

[Magiel Oberholster]

Naand almal.
Ek wil weet waar kan ek my blok laat boor, en weer resleeve. Kan ek net die beskadigde piston vervang of is dit beter om almal te vervang. En wat gaan die kostes beloop.

[Michael]

Hi Magiel

Vir watse engine is dit?

[Tinus lotz]

Ek sal al vier doen is dit op hou 3.2 ?

[Magiel Oberholster]

Micheal dis n QD3.2 Hardbody diesel.

Tinus ek het daar aan gedink nadat ek gepost het. Het jy miskien 'n idee wat prys die pistons.
Ek wou die trokkie smous maar na 'n lekker vakansie in Botswana het ek daar teen besluit.

[Michael]

Magiel, kry n kwotasie by Nissan op n kompleet engine rebuild dan stuur jy vir my die kwotasie.
Ek kan vir jou tussen 30% en 40% goedkoper kry....... soms meer

[Kagiso II]

Magiel.. Ek het pel se ZD 3o laat oordoen met nuwe pistons, ringe, heads vir onner R10,000.
Kan gedoen word..
Daai enjin loop nounog, na omtrent 80,000 km.
Die parte het ons by Alert Engine parts in Pretoria Wes aangeskaf

[ricster]

If the head is still 100%, then the costs are not going to be wild.

I would replace all 4 pistons and rings with Alfin type pistons ( check out Michaels thread - http://www.patrol4x4.co.za/viewtopic.php?f=44&t=4458 ) or my post from a long time ago ( search for - Iron Maiden burnt a hole ) for reasons why the Alfin pistons in my opinion are the better way to go.

For the engineering, I only know the guy that did my motor in Alberton. He did everything for me including rebuilding the head and seating valves etc for R 3000. But that was for 6 cylinders, and also 4 years ago.

I believe that everything can be bought from places like Alert or similar places, but again I would say head gasket and anti freeze/coolant MUST be from the agents. Anti freeze is a VERY important item that guys tend to overlook and chuck any old sh..... into the radiator. The correct dilution of the antifreeze/coolant is VERY important. There is hydrochloric acid in antifreeze/coolant that if not used correctly it will eat your engine away. It's there to keep the ports clean. We all know how important cooling is on a diesel !!

Look forward to seeing the rebuild when you do it !!!

[Magiel Oberholster]

Michael ek sal dit in gedagte hou.

Oom Mac water tipe pistons het julle in gesit.

Cedrick wat is die verskil tussen die Alfin tiepe piston en die standaard NISSAN piston.Watter een pizzzzzzz die meeste.
Is dit 'n hoë kompressie piston?

[ricster]

The Alfin type pistons and rings are designed for turbo motors. The top ring has a bevel on one side of the ring ( half keystone if I remember correctly ). The Alfin ( Keystone) piston has the grooves to hold this type of ring. When the cylinder is under compression the ring squeezes against the sleeve to create a better seal. The higher the compression the more the ring squeezes.

The down side to these pistons is that if you leave the diesel engine idling for loooooooong periods of time there is a chance hat you will glaze the sleeves. So start the motor, and you can let it idle for maybe a minute, but then you need to drive gently till temperatures are up to normal. Then you drive like you stole it. A diesel motor doesn't like to be treated like a new born baby. It is a workhorse motor and must be worked to maintain the motor in good condition. Regular servicing is therefore a high priority.

some info ....

http://www.patrol4x4.co.za/viewtopic.ph ... fin#p49365

http://www.patrol4x4.co.za/viewtopic.ph ... fin#p46005

[Michael]

I agree with Cedric, never warm up an engine.....its really bad for the engine and sleeve glazing is the result