About six months ago my 02 4.0 made that horrible "I have no oil" tappet /
lifter noise for about 2 seconds when I started it up one morning. It was
short enough time and the fact that it had never happened before that by the
time my brain noticed it, processed it and realized what it was, it was
gone. It worried me but it was so brief that the more I thought about it the
more unsure I was that it was what I thought it was.

It was about two months later it did it again. In the next several months
it did it maybe twice.

So far in the last week it has done it three times . The sound is without a
doubt that ' motor with no oil ' sound. I change the oil regularly, it only
has 38k miles on it , the weather / temperature seems irrelevant to the
occurrence. It is brief, only a second or two seconds, and only when
starting it after it has set all night , never after it has set all day
(while I'm at work). Oil pump going bad ? That would seem like the obvious
answer to me but then something about the fact that it only does it after it
has set 12 hours or more... thought I would ask around before I waste time /
money replacing the oil pump.


Farrell Christeson

 

"Farrell Christeson" <spamthis@train.missouri.org> wrote in message
news:3PDUe.81$0u4.5562@news.more.net...
> About six months ago my 02 4.0 made that horrible "I have no oil" tappet
/
> lifter noise for about 2 seconds when I started it up one morning. It was
> short enough time and the fact that it had never happened before that by
the
> time my brain noticed it, processed it and realized what it was, it was
> gone. It worried me but it was so brief that the more I thought about it
the
> more unsure I was that it was what I thought it was.
>
> It was about two months later it did it again. In the next several months
> it did it maybe twice.
>
> So far in the last week it has done it three times . The sound is without
a
> doubt that ' motor with no oil ' sound. I change the oil regularly, it
only
> has 38k miles on it , the weather / temperature seems irrelevant to the
> occurrence. It is brief, only a second or two seconds, and only when
> starting it after it has set all night , never after it has set all day
> (while I'm at work). Oil pump going bad ? That would seem like the
obvious
> answer to me but then something about the fact that it only does it after
it
> has set 12 hours or more... thought I would ask around before I waste time
/
> money replacing the oil pump.
>
>
> Farrell Christeson


My '01 XJ had a sudden, total loss of oil pressure
accompanied by the "lifter?" knock. Turned out that
the cam position sensor locked up tight and chipped
a couple teeth off the gear, no longer turning the oil
pump. You might consider inspecting the sensor before
digging for the oil pump.



-Matt-

 

"Farrell Christeson" <spamthis@train.missouri.org> wrote in message
news:3PDUe.81$0u4.5562@news.more.net...
> About six months ago my 02 4.0 made that horrible "I have no oil" tappet
/
> lifter noise for about 2 seconds when I started it up one morning. It was
> short enough time and the fact that it had never happened before that by
the
> time my brain noticed it, processed it and realized what it was, it was
> gone. It worried me but it was so brief that the more I thought about it
the
> more unsure I was that it was what I thought it was.
>
> It was about two months later it did it again. In the next several months
> it did it maybe twice.
>
> So far in the last week it has done it three times . The sound is without
a
> doubt that ' motor with no oil ' sound. I change the oil regularly, it
only
> has 38k miles on it , the weather / temperature seems irrelevant to the
> occurrence. It is brief, only a second or two seconds, and only when
> starting it after it has set all night , never after it has set all day
> (while I'm at work). Oil pump going bad ? That would seem like the
obvious
> answer to me but then something about the fact that it only does it after
it
> has set 12 hours or more... thought I would ask around before I waste time
/
> money replacing the oil pump.
>
>
> Farrell Christeson


My '01 XJ had a sudden, total loss of oil pressure
accompanied by the "lifter?" knock. Turned out that
the cam position sensor locked up tight and chipped
a couple teeth off the gear, no longer turning the oil
pump. You might consider inspecting the sensor before
digging for the oil pump.



-Matt-

 

"Farrell Christeson" <spamthis@train.missouri.org> wrote in message
news:3PDUe.81$0u4.5562@news.more.net...
> About six months ago my 02 4.0 made that horrible "I have no oil" tappet
/
> lifter noise for about 2 seconds when I started it up one morning. It was
> short enough time and the fact that it had never happened before that by
the
> time my brain noticed it, processed it and realized what it was, it was
> gone. It worried me but it was so brief that the more I thought about it
the
> more unsure I was that it was what I thought it was.
>
> It was about two months later it did it again. In the next several months
> it did it maybe twice.
>
> So far in the last week it has done it three times . The sound is without
a
> doubt that ' motor with no oil ' sound. I change the oil regularly, it
only
> has 38k miles on it , the weather / temperature seems irrelevant to the
> occurrence. It is brief, only a second or two seconds, and only when
> starting it after it has set all night , never after it has set all day
> (while I'm at work). Oil pump going bad ? That would seem like the
obvious
> answer to me but then something about the fact that it only does it after
it
> has set 12 hours or more... thought I would ask around before I waste time
/
> money replacing the oil pump.
>
>
> Farrell Christeson


My '01 XJ had a sudden, total loss of oil pressure
accompanied by the "lifter?" knock. Turned out that
the cam position sensor locked up tight and chipped
a couple teeth off the gear, no longer turning the oil
pump. You might consider inspecting the sensor before
digging for the oil pump.



-Matt-

 

"Farrell Christeson" <spamthis@train.missouri.org> wrote in message
news:3PDUe.81$0u4.5562@news.more.net...
> About six months ago my 02 4.0 made that horrible "I have no oil" tappet
/
> lifter noise for about 2 seconds when I started it up one morning. It was
> short enough time and the fact that it had never happened before that by
the
> time my brain noticed it, processed it and realized what it was, it was
> gone. It worried me but it was so brief that the more I thought about it
the
> more unsure I was that it was what I thought it was.
>
> It was about two months later it did it again. In the next several months
> it did it maybe twice.
>
> So far in the last week it has done it three times . The sound is without
a
> doubt that ' motor with no oil ' sound. I change the oil regularly, it
only
> has 38k miles on it , the weather / temperature seems irrelevant to the
> occurrence. It is brief, only a second or two seconds, and only when
> starting it after it has set all night , never after it has set all day
> (while I'm at work). Oil pump going bad ? That would seem like the
obvious
> answer to me but then something about the fact that it only does it after
it
> has set 12 hours or more... thought I would ask around before I waste time
/
> money replacing the oil pump.
>
>
> Farrell Christeson


My '01 XJ had a sudden, total loss of oil pressure
accompanied by the "lifter?" knock. Turned out that
the cam position sensor locked up tight and chipped
a couple teeth off the gear, no longer turning the oil
pump. You might consider inspecting the sensor before
digging for the oil pump.



-Matt-