Question about 1993 Mitsubishi Lancer

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1500cc engine noise on oil pump

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Hi I'm Peter, Check your oil pressure some pumps as they start to go out the oil pressure will fluctuate. I would also check the oil filter housing and or pump for a pressure relief valve. if the oil filter becomes clogged there is usually a relief valve in the oil filter housing where it mounts to the engine then into the pump that if the filter collapses or becomes clogged it will open. Sometimes the spring behind the steel ball will weaken or break causing the ball to chatter back and forth. You can use a mechanics stethoscope to narrow it down further if you need. If it is your oil pump going out you will need to do something soon or you will have an engine rebuild on your hands.

Posted on Apr 15, 2014

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Posted on Jan 02, 2017

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How to tell if oil pump is starting to go out?


1. Engine Noise. With a bad oil pump sufficient engine oil will not get to all parts of the engine, especially the top end, and you will get engine noise with metal parts that would normally be lubricated and quiet knocking due to metal to metal contact. Engines with hydraulic lifters that become noisy can be a sign that they have insufficient oil supply. In addition to the hydraulic lifters, your valve train may begin to make noise if your oil pump begins to fail. Valve train components need to be properly lubricated as well. A bad oil pump can result in a lot of additional noise from your valve train system.

2. Higher engine temperature. Poor lubrication because of poor oil flow generated from the pump will cause friction in the engine and the engine temperature will rise. Good oil flow is essential for lubrication and reducing friction to a minimum.

3. Low oil pressure. The oil pump generates oil flow through the engine but tolerances between metal parts produce the oil pressure. Very worn engine bearings will result in low oil pressure. Thus a worn engine will have low oil pressure even though the oil pump may be fine and there is no issue with the oil pressure relief valve either. However you will also experience low oil pressure due to a failing oil pump because poor oil flow will also result in lower oil pressure.

If your oil pressure warning light has been triggered in your engine, the causes of the low pressure need to be properly investigated because the problem may not be with the oil pump. People replace oil pumps assuming that is always the problem and then still have low oil pressure because the pump was not the problem to begin with.

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Where is the location of oil filter on engine 1500cc ba


Hello Nick,

It is good if you try your hands on the oil engine but why not give an automobile mechanic to help you out so as not to tamper with the car parts.

Thanks...
Alli
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1 Answer

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Usually a tapping noise is a valve lifter or a piston connecting rod.
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Why replace the oil pump? That won't make noises go away or cause noises. Your mechanic should be able to answer theses questions, as to the cause of noises.

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Well, if the low-oil-pressure warning light is on, and the engine is knocking, and there is plenty oil in the crankcase, then the oil pump must not be circulating oil thru the engine. So, I agree -- I think your oil pump is bad.

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