2000 Ford Expedition engine

MUSTARD

MEMBER
2000 FORD EXPEDITION
5.4L
V8
4WD
AUTOMATIC
191,234 MILES

This thursday around 11:45 AM I was driving amd all of a sudden I hear knocking sounds from my engine and looked at my engine oil bone dry but from what im hearing its my oil pump can this be the reason why?

Sunday, August 10th, 2014 AT 9:25 PM

2 Replies

CJ MEDEVAC II

MEMBER
222 POSTS

IT IS IMPORTANT TO CHECK YOUR OIL AT MINIMUM, "WEEKLY" AS PROBABLY PRESCRIBED IN YOUR OWNERS MANUAL.

"MY DAY" IS SATURDAY, I CHECK 'EM ALL, EVEN IF THEY WERE NOT DRIVEN. PEOPLE LAUGH WHEN I TELL 'EM WHAT "MOST" OWNER'S MANUALS SAY, I HAVE ALWAYS "CAUGHT" PROBLEMS, BEFORE A DISASTER HAPPENED!

IF YOU SUSPECT A PROBLEM OR YOUR GAUGE OR LIGHT SAYS YOU HAVE A PROBLEM! ANYTHING COULD HAPPEN WITHIN SECONDS, YOUR OIL PLUG FALLS OUT (INSTALLED WRONG) OR ROAD DEBRIS KNOCKS A HOLE IN YOUR PAN!

IF LACK OF OIL (OR OIL PRESSURE) IS THE ISSUE, IMMEDIATELY SHUT IT DOWN. NO LIMPING IT ANOTHER 500 FEET!

EVEN IF YOU CHECK AND "HAVE OIL"---YOUR OIL PUMP MAY NOT BE WORKING!

FROM HOW YOU WORDED YOUR QUESTION

IT SOUNDS LIKE THE KNOCKING WAS FROM OIL STARVATION (LACK OF OIL)-NOT LACK OF OIL PRESSURE (OIL PUMP)

I CAN ONLY THINK OF FOR WHY YOU WERE LACKING OIL IS:

1) IT LEAKED OUT

2) IT WAS BURNED THRU THE ENGINE (MAYBE SMOKING A LOT)

3) NO OR LITTLE OIL WAS INSTALLED AT "OIL CHANGE TIME" (IT IS SO IMPORTANT TO CHECK YOUR OIL LEVEL, IMMEDIATELY AFTER, IF IT WAS PERFORMED BY SOMEONE ELSE- DISTRACTIONS OR INCOMPETENCE MAY COST YOU YOUR ENGINE OR WORSE

MAYBE YOUR ENGINE GOT LUCKY?

KEEP US POSTED ON HOW IT IS WHEN YOU ADD OIL

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Sunday, August 10th, 2014 AT 10:19 PM

CARADIODOC

MECHANIC
33,737 POSTS

Definitely not. Oil pumps pump engine oil. They can't do that when there isn't any. Oil under pressure is the live blood of an engine just as blood is to our bodies. Engines are damaged within a few seconds of running out of oil. When it takes a long time for the oil to leak out, the damage occurs more slowly but for a longer period of time. You should have had a lot of warning this was happening. The oil pressure warning light would have been flashing on or the dash gauge would have read 0 psi, particularly when going around corners. The final stage of the damage is when knocking starts. The bearings have been ground away, and the crankshaft journals will be scored and chewed up. That causes the knocking you can hear. The other damage is a lot more subtle and won't be noticeable until the engine is disassembled to be rebuilt. Often it's less expensive to get a good used engine from a salvage yard.

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Sunday, August 10th, 2014 AT 10:25 PM