G'day folks,
Two things i am going to look into while playing with my 3lt Patrol,
Firstly to purchase a second hand short motor with the aim of rebuilding it with ceramic crown coating forged piston from Diesel Performance Parts. My research has found that these pistons are the ducks nuts for performance diesel motors. The following is a spiel about these pistons
Diesel Performance PartsŪ is ENGINE Australia’s private label, range of aftermarket performance diesel engine parts. The range consists of pistons with ceramic coated crowns and MoS2/Teflon coated skirts, to suit the Nissan diesel engines. These pistons are pre-topped 0.15 mm to compensate for decking the block and were further pre-topped in the factory to allow for the added thickness of the ceramic crown coating. New pistons are being continually added to the range.
The non-porous ceramic crown coating can withstand temperatures of up to 1300°C and pressures of up to 69,000 kPa (10,000 psi). This helps to keep the piston cooler, which stops it from softening and failing prematurely from high combustion chamber temperatures. Reduced heat loss to the piston equates to better fuel burn rates, and increased power and fuel economy, depending on how the engine is operated.
The MoS2 skirt coating contains Teflon and is a dry film lubricant. It adds 0.025 mm (0.001”) to the skirt diameter and can withstand temperatures of up to 600°C. It will help prevent piston scuffing in the bores in most marginal lubrication conditions.
Product packaged under the Diesel Performance PartsŪ brand is manufactured exclusively for Engine Australia, to Engine Australia’s specifications. Customers using Diesel Performance PartsŪ products benefit from Engine Australia’s extensive engineering experience with, and knowledge of, diesel engines, their operations and components. With direct access to engine parts manufacturers around the Globe, Engine Australia is able to better service the aftermarket diesel engine parts industry with quality Diesel Performance PartsŪ.
Secondly is to resigned the inlet manifold so that the correct fuel air ratios are balanced to all ports. One of the main problems i can see why 3/4 pistons are letting go is due to over fueling in these cylinders, resulting in extremely high temps. Also the fact that the Nissan Pistons in the 3lt are a substandard material which does not help.
As Nissannewby rightly explains there are a multitude of problems that cause these motors to let go. It is being able to address all these problems together.
This is going to be my research and development hobby!!!!!!!!!!!!!!!
Regards,
PMC
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