Posted by Polar Pilot on June 03, 2002 at 19:29:15:
In Reply to: about oil pump in motorbikes posted by sudheer.s on June 03, 2002 at 18:19:54:
Have to back up a bit - first question is what is oil doing in the engine. Then comes question about oil pump.
Oil in all engines plays two roles - lubrication is primary but with the amount of heat generated in an aircooled engine cooling is a second major function.
The oil left in the bottom of the sump would not do much lubrication beyond a splashing system that in early styles of internal combustion engines (motorcycles) lubricated the connecting rods, piston skirts and crankshaft.
Subsequent refinements in technology identified the need for lubrication in locations increasingly remote from the engine sump. New machining and casting techniques allow the inclusion of oil passages to allow oil for both lubrication and cooling to be " pumped" up to the cylinder head and throughout the engine.
The oil pump is the criter responsible for getting the circulation job completed.
Usually, the oil pump is a geared vein design which draws oil in on one side = and forces it out on the other- The oil under pressure is forced into the transmission, the crankshaft and up to the camshaft and all its related mechanisms on the cylinder head.
Later engines added oil filters to this equation so that when shards of metal are encountered - they in effect are trapped at the filter and cannot circulate within the engine to cause more damage.
As to the brand of pump on the Savage - I really have no idea - but if you visit your local shop and talk with the boys in the back - they will be able to fill you in on more details.
Souping up an engine usually leads to attention to the oil pump by either increasing the pumping pressure or by increasing the volume of circulation. Both of these of course still maintain the original purposes - lubrication and cooling.
Hope this helps a bit -
Keep the rubber side down
Polar Pilot