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Join Date: Feb 2002
Location: The land that Time forgot
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Originally posted by D147:
<strong>Found this on an Alfa site about the V6 engine, maybe the T Sparks use the same system to spray oil onto piston crowns, as my 2.0 drinks loads of oil aswell:
"Alfa Romeo's normally aspirated 2956 cc 24 valve alloy 60 degree V6 engine provides the V6 version of the Spider with stunning performance. Its key technical features include:
Cylinder heads with hemispherical combustion chambers, central spark plugs and narrow 37-degree valve angle
Twin overhead camshafts for each cylinder head and four valves per cylinder operated directly by hydraulic tappets
Static ignition with one coil per cylinder and dual knock control, one sensor per bank of cylinders located in the cylinder block
A lubrication system, which uses specially designed jets to spray oil onto the piston crowns, ensuring highly effective cooling
Dual platinum electrode spark plugs
Special belt tensioners which free the engine from frequent maintenance".</strong><hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">That oil spray is a system that forces oil through appertures aimed at the underside of the piston crown. This helps keep the piston crown cool (though the ignition process is happening on the other side of the crown to where the oil is).
Otherwise, the underside of the piston tends not to circulate too much oil and would stay hot.
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