As Bill says, the drive mechanism can break. I have also seen the oil
pickup break off and fall into the sump. If you stopped when there was only
ticking from the top end, there is the possibility that you saved it.

This could have been a plain old defective part, and there may be no TSB.
My advice is pull the pan, pull the pump, and try to figure out what
happened.

Earle

"matt borland" <mborland@columbus.rr.com> wrote in message
news:xHsOe.20140$2Q3.15820@tornado.ohiordc.rr.com. ..
> The Jeep: 48000mi 2001 Cherokee Sport, 4.0L Auto.
>
> The Incident: Driving along, suddenly there's engine light,
> followed by check guages light, accompanied by ticking
> from top end and no oil pressure reading on the guage.
>
> I shut it off and cruise to a good pull-off spot. Pop the hood,
> check the oil, plenty there and not too bad looking either.
>
>
> The Most Obvious Diagnosis: Oil Pump Died.
>
>
> Anybody here experienced this or heard about it? It just
> seems odd that the usually indestructible 4.0L in one of
> it's latest and finest forms would take a dump this early
> in it's service life. I've had others that are still running around
> at 160k+, hence I bought another one with low miles with
> the intention of driving it for a long time.
>
>
> I'm headed to the alldata site to see if there's a TSB...
>
>
>
> -Matt-
>
>

 

"Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> As Bill says, the drive mechanism can break. I have also seen the oil
> pickup break off and fall into the sump. If you stopped when there was
only
> ticking from the top end, there is the possibility that you saved it.
>
> This could have been a plain old defective part, and there may be no TSB.
> My advice is pull the pan, pull the pump, and try to figure out what
> happened.
>
> Earle


The one thing nobody remembered is the '01 is distributorless ignition...

But yes, I agree it must be the pump. Like in SBC engines the pickup
(if press fit) can fall off or if they use a plastic bushing on the pump
drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...


Here's hoping the lag time between the light coming on and me noticing
the noise/guage reading wasn't enough to toast the bearings or ruin the
cam and lifters...


What a pisser...



-Matt-

 

"Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> As Bill says, the drive mechanism can break. I have also seen the oil
> pickup break off and fall into the sump. If you stopped when there was
only
> ticking from the top end, there is the possibility that you saved it.
>
> This could have been a plain old defective part, and there may be no TSB.
> My advice is pull the pan, pull the pump, and try to figure out what
> happened.
>
> Earle


The one thing nobody remembered is the '01 is distributorless ignition...

But yes, I agree it must be the pump. Like in SBC engines the pickup
(if press fit) can fall off or if they use a plastic bushing on the pump
drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...


Here's hoping the lag time between the light coming on and me noticing
the noise/guage reading wasn't enough to toast the bearings or ruin the
cam and lifters...


What a pisser...



-Matt-

 

"Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> As Bill says, the drive mechanism can break. I have also seen the oil
> pickup break off and fall into the sump. If you stopped when there was
only
> ticking from the top end, there is the possibility that you saved it.
>
> This could have been a plain old defective part, and there may be no TSB.
> My advice is pull the pan, pull the pump, and try to figure out what
> happened.
>
> Earle


The one thing nobody remembered is the '01 is distributorless ignition...

But yes, I agree it must be the pump. Like in SBC engines the pickup
(if press fit) can fall off or if they use a plastic bushing on the pump
drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...


Here's hoping the lag time between the light coming on and me noticing
the noise/guage reading wasn't enough to toast the bearings or ruin the
cam and lifters...


What a pisser...



-Matt-

 

"Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> As Bill says, the drive mechanism can break. I have also seen the oil
> pickup break off and fall into the sump. If you stopped when there was
only
> ticking from the top end, there is the possibility that you saved it.
>
> This could have been a plain old defective part, and there may be no TSB.
> My advice is pull the pan, pull the pump, and try to figure out what
> happened.
>
> Earle


The one thing nobody remembered is the '01 is distributorless ignition...

But yes, I agree it must be the pump. Like in SBC engines the pickup
(if press fit) can fall off or if they use a plastic bushing on the pump
drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...


Here's hoping the lag time between the light coming on and me noticing
the noise/guage reading wasn't enough to toast the bearings or ruin the
cam and lifters...


What a pisser...



-Matt-

 

Should be fine. I lost ALL the oil out of my celica's 22RE about 5 miles
from home. Drove gleefully all the way with no damage. Still runs 10,000
miles later.

Carl


"matt borland" <mborland@columbus.rr.com> wrote in message
news:4owOe.23096$2Q3.15919@tornado.ohiordc.rr.com. ..
>
> "Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
> news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> > As Bill says, the drive mechanism can break. I have also seen the oil
> > pickup break off and fall into the sump. If you stopped when there was
> only
> > ticking from the top end, there is the possibility that you saved it.
> >
> > This could have been a plain old defective part, and there may be no
TSB.
> > My advice is pull the pan, pull the pump, and try to figure out what
> > happened.
> >
> > Earle
>
>
> The one thing nobody remembered is the '01 is distributorless ignition...
>
> But yes, I agree it must be the pump. Like in SBC engines the pickup
> (if press fit) can fall off or if they use a plastic bushing on the pump
> drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...
>
>
> Here's hoping the lag time between the light coming on and me noticing
> the noise/guage reading wasn't enough to toast the bearings or ruin the
> cam and lifters...
>
>
> What a pisser...
>
>
>
> -Matt-
>
>
>
>
>

 

Should be fine. I lost ALL the oil out of my celica's 22RE about 5 miles
from home. Drove gleefully all the way with no damage. Still runs 10,000
miles later.

Carl


"matt borland" <mborland@columbus.rr.com> wrote in message
news:4owOe.23096$2Q3.15919@tornado.ohiordc.rr.com. ..
>
> "Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
> news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> > As Bill says, the drive mechanism can break. I have also seen the oil
> > pickup break off and fall into the sump. If you stopped when there was
> only
> > ticking from the top end, there is the possibility that you saved it.
> >
> > This could have been a plain old defective part, and there may be no
TSB.
> > My advice is pull the pan, pull the pump, and try to figure out what
> > happened.
> >
> > Earle
>
>
> The one thing nobody remembered is the '01 is distributorless ignition...
>
> But yes, I agree it must be the pump. Like in SBC engines the pickup
> (if press fit) can fall off or if they use a plastic bushing on the pump
> drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...
>
>
> Here's hoping the lag time between the light coming on and me noticing
> the noise/guage reading wasn't enough to toast the bearings or ruin the
> cam and lifters...
>
>
> What a pisser...
>
>
>
> -Matt-
>
>
>
>
>

 

Should be fine. I lost ALL the oil out of my celica's 22RE about 5 miles
from home. Drove gleefully all the way with no damage. Still runs 10,000
miles later.

Carl


"matt borland" <mborland@columbus.rr.com> wrote in message
news:4owOe.23096$2Q3.15919@tornado.ohiordc.rr.com. ..
>
> "Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
> news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> > As Bill says, the drive mechanism can break. I have also seen the oil
> > pickup break off and fall into the sump. If you stopped when there was
> only
> > ticking from the top end, there is the possibility that you saved it.
> >
> > This could have been a plain old defective part, and there may be no
TSB.
> > My advice is pull the pan, pull the pump, and try to figure out what
> > happened.
> >
> > Earle
>
>
> The one thing nobody remembered is the '01 is distributorless ignition...
>
> But yes, I agree it must be the pump. Like in SBC engines the pickup
> (if press fit) can fall off or if they use a plastic bushing on the pump
> drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...
>
>
> Here's hoping the lag time between the light coming on and me noticing
> the noise/guage reading wasn't enough to toast the bearings or ruin the
> cam and lifters...
>
>
> What a pisser...
>
>
>
> -Matt-
>
>
>
>
>

 

Should be fine. I lost ALL the oil out of my celica's 22RE about 5 miles
from home. Drove gleefully all the way with no damage. Still runs 10,000
miles later.

Carl


"matt borland" <mborland@columbus.rr.com> wrote in message
news:4owOe.23096$2Q3.15919@tornado.ohiordc.rr.com. ..
>
> "Earle Horton" <nurse--NOSPAM--busters@msn.com> wrote in message
> news:1124755705.7e695340a5016f0f6daa1eeb0daf2a91@t eranews...
> > As Bill says, the drive mechanism can break. I have also seen the oil
> > pickup break off and fall into the sump. If you stopped when there was
> only
> > ticking from the top end, there is the possibility that you saved it.
> >
> > This could have been a plain old defective part, and there may be no
TSB.
> > My advice is pull the pan, pull the pump, and try to figure out what
> > happened.
> >
> > Earle
>
>
> The one thing nobody remembered is the '01 is distributorless ignition...
>
> But yes, I agree it must be the pump. Like in SBC engines the pickup
> (if press fit) can fall off or if they use a plastic bushing on the pump
> drive shaft it can let go, or I may have got the 1-in-10,000 bad pump...
>
>
> Here's hoping the lag time between the light coming on and me noticing
> the noise/guage reading wasn't enough to toast the bearings or ruin the
> cam and lifters...
>
>
> What a pisser...
>
>
>
> -Matt-
>
>
>
>
>

 

matt borland did pass the time by typing:

> The one thing nobody remembered is the '01 is distributorless ignition...

Distributor or not, is there still a pickup? Something has to be turning
the pump and providing TDC reference.

Haven't looked that hard at a newer engine.

--
DougW