Indicated value of watch of engine oil pressure is too low
When engine works, engine oil pressure holds the pressure range in 150 ～ 350kPa commonly inside. If engine oil pressure expresses pressure value of the directive to be less than 98kPa, can regard engine oil as pressure too low, should jockey instantly undertake checking, cause a part easily otherwise excessive wear away, produce “ to burn the great mechanical failure such as the made of baked clay ” that hold an axis in the arms even.
Cause engine oil pressure to cross small main reason, it is engine oil viscosity too low; 2 it is mesh of colander of engine oil collect or engine oil filter filter core jams; The 3 bounce that are pressure limiting valve and return valve bedspring abate or break off, or it is valve joint face sealed and lax, cause leakage oily pressure release; 4 it is headstock or clearance of connecting rod bearing too big; 5 it is lubricating oil pump the job is bad.
When the examination, listen attentively to engine crankcase place carefully to have the “ that happens without the place when bearing gap is too big first abnormal knocking of toot ” , combinative bearing is assembled and use a case, make a preliminary judgement. Dismantle engine flameout in medium speed next, touch with the hand instantly carapace of outer garment of engine oil fine colander, look have without oscillatory feeling, after listening attentively to flameout of fine colander rotor, have without the “ that continues to rotate hoarse neighs ” sound. If not have,the continuity below inertial action rotates sound, may be capacity of oil of pump of lubricating oil pump insufficient or the discharge inside pressure limiting valve and return valve is serious (attention, must make sure condition of technology of rotor of engine oil fine colander is normal, because rotor crosses aperture of dirty, fuel injection,pass big, mesh of the mouth that receive oil blocks those who wait for a reason to all can affect rotor up dead to rotate the movement after speed and flameout is inertial) . Of afterwards, check the viscosity of engine oil. Take out oil dip rod, the engine oil that observes the conglutinate on dipstick has without bubble, if have, explain to cent having water is mixed in engine oil. The reason is water covers block hydrosphere slack or it is cylinder bushing ruptures break-through of the corrode that reach acupuncture point. a few on the hand of engine oil drop on oil dip rod, twist with forefinger and big toe move, if feel oleaginous not fat, perhaps smell derv flavour, make clear engine oil by derv dilute. Derv comes from commonly inside the crock, wear away as a result of push rod and oriented aperture or be invalidation of balata sealing ring, the crankcase of infiltration of wall of derv edge crock of room of the antrum after fuel feed pump. Derv comes from fuel feed pump possibly still, wear away as a result of push rod and oriented aperture or be invalidation of balata sealing ring, the derv of room of the antrum after fuel feed pump enters room of antrum of bottom of pump housing of high-pressured oil pump from aperture along with push rod, the bearing before passing camshaft next and when gear room enters crankcase. If engine oil is medium already anhydrous also does not have derv, but viscosity is apparently insufficient, should considering is engine oil temperature exorbitant metamorphism or place add engine oil name or quality disagreement asks be caused by.
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