Question about 2001 Hyundai Elantra

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Its full of oil but I'm getting a knocking sound and the oil pressure light keeps coming on and off

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IT SOUNDS LIKE YOU HAVE AN BEARING- OR AN LIFTER THATS WORN, IF THE KNOCKING IS HALF OF SPEED RPM ITS GENERALLY AN LIFTER , BUT IF ITS SAME SPEED AS RPM ON CRANK IT COULD BE AN ROD END BEARING ,

Posted on Oct 12, 2010

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Try changing the oil/ filter (10/40 semi)as a first step then if still happens, give me another message for free...

Posted on Oct 12, 2010

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3 Answers

My Lincoln Continental 2000 Model oil light came on engine stopped after 25 feet. would not restart even though oil full. The car started the next day, but had a rattling sound at the top of the motor


Oil light is rather important it goes out if oil pressure is good comes on if oil pressure is low when it comes on damage is expected with continued operation like wearing of main bearings and pistons and cylinders can lead to a engine rebuild

May 30, 2017 | Lincoln Cars & Trucks

1 Answer

I have a 1996 ford Taurus 24valve V6 oil is reading full..but oil light keeps coming on and has a slight knocking sound..don't know where to start


First off,when did you last change the oil? Did you change the filter?
Sounds like an oil pressure drop,or a serious engine problem.
If the oil could stand changing,go with a heavier viscosity,like 10W30 or 10W40 if necessary.
ALWAYS change the filter when the oil is changed. don-ohio (:^)

Sep 03, 2015 | Ford Cars & Trucks

1 Answer

While driving made a whooshing sound then oil light started flashing


Hi Rcw, It sounds to me as if you have major engine problems. Knocking sounds are not good omens when coming from engines. The oil pressure light measures pressure not level. Get the vehicle towed in and diagnosed correctly. Don't drive it as that could cause more problems. Regards John

Oct 24, 2012 | 1999 Chevrolet Cavalier

1 Answer

My oil light comes on after the engine warms up and stays on the entire time i'm driving. We've changed the oil and filter and keep a check on the levels but the light continues to come on. Any...


you may have a bad oil sending unit the oil light works off of oil pressure i would start by changing the oil sending unit and if the light still comes on then you have bigger problems. get a mechanical oil pressure gauge and hook up and check the oil pressure after the engine has warmed up to operating temp you should have at around 30 psi but can survive with 10psi but might be time for a rebuild. if no oil pressure then you might have a broken shaft between the oil pump and the distrubuter. if the engine is running and not making any out of the normal ticking, knocking sounds probably just the sending unit though, they are about 25 dollars and i believe its right above the oil filter on the 6 cylinder.

Dec 07, 2010 | 1999 Plymouth Voyager

1 Answer

Oil light on, knocking, crankcase full oil smells burnt, no leaks or smoke.


Sounds bad, usually this is the death sounds of an engine. At some point you have lost oil pressure either the pump or it has got to low on oil, now the main bearings on the conrods are failing. If you keep it running much longer there will be a big bang and a conrod will come out of the side of the engine or out the bottom and thats not good!!!

Nov 08, 2010 | 1998 Hyundai Elantra

1 Answer

THE OIL LIGHT KEEPS COMING ON AND WHEN I ADDED 1/2 QT NOW IT IS KNOCKING REALLY BAD AND SOUNDS LIKE THE ENGINE IS GOING TO BLOW UP


you have low oil pressure, so adding oil will not cure the light, if the engine is knocking u have damaged the engine bearings and it will need to be torn down and rebuilt.

Oct 19, 2009 | 2003 Mitsubishi Montero Sport

1 Answer

Engine knock hard over 2500 rpm


Does the oil light come on or the knock occur during the engine warm up after a cold start?
There could be a couple of problems causing the issue. You could have an oil pressure pump or pump pressure regulator sticking. I would have a mechanical oil pressure gauge installed and verify oil pressure at idle and 2500 rpms to make sure oil pressure is in normal ranges.
You could also have excessive piston rod bearing, crankshaft bearing or cam shaft bearing wear that will cause oil pressure to drop too low to prevent the rod knock your hearing at 2500 rpm.
You said a knock and not a ticking noise,so I don't believe a lifter is the issue at 2500 rpm.
Start with the oil pressure check and go from there.
Let me know.
Regards,

Aug 22, 2009 | 1996 Dodge Stratus

1 Answer

1979 cad fleetwood brougham knocking sound from,engine


Sometimes collapsed lifters or loose rocker arms can cause knocking sounds in an engine. However, the fact that there was a possible loss of oil pressure and that the knocking gets louder as the rpm's increase, would indicate that there is damage to a connecting rod bearing and possibly the crankshaft. If the latter is the case you are looking at a fairly substantial repair bill.

Apr 14, 2009 | 1990 Cadillac Fleetwood

1 Answer

Low oil pressure light came on and hard knocking.


If your getting knocking, don't start it. Have someone look for proper oil filter, and double check level. Something they did has done some damage, by the sounds of it. If you don't trust them, have it diagnosed by another mechanic & report to them what was found. Let us know.Keep all your receipts & mileage when oil changed etc.

Dec 22, 2008 | 2006 Ford F-150

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