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

 

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

 

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

 

Well then, pull the cam sensor and check for it's drive gear:
http://www.----------.com/temp/camSensor.jpg
God Bless America, ßill O|||||||O
mailto:--------------------

matt borland wrote:
>
> 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-

 

Well then, pull the cam sensor and check for it's drive gear:
http://www.----------.com/temp/camSensor.jpg
God Bless America, ßill O|||||||O
mailto:--------------------

matt borland wrote:
>
> 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-

 

Well then, pull the cam sensor and check for it's drive gear:
http://www.----------.com/temp/camSensor.jpg
God Bless America, ßill O|||||||O
mailto:--------------------

matt borland wrote:
>
> 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-

 

Well then, pull the cam sensor and check for it's drive gear:
http://www.----------.com/temp/camSensor.jpg
God Bless America, ßill O|||||||O
mailto:--------------------

matt borland wrote:
>
> 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-

 

When mine went last summer it was as simple as the thin paper gasket
between the pump and the block blowing out - but that left me with
about half pressure, so I made it home. Outside possibility would be
a high pressure relief valve stuck open or with a collapse spring. I
would try pulling the distributor as others suggested first but you're
probably going to have to pull the pan anyway. Good news is that it's
a one bananna job to replace the pump once the pan is off.

Here's hoping you see the blade on the end of the distributor shaft
gone/mangled (but spin the pump anyway).

On Tue, 23 Aug 2005 00:05:34 UTC "Earle Horton"
<nurse--NOSPAM--busters@msn.com> wrote:

> 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-
> >
> >
>
>


--
Will Honea

 

When mine went last summer it was as simple as the thin paper gasket
between the pump and the block blowing out - but that left me with
about half pressure, so I made it home. Outside possibility would be
a high pressure relief valve stuck open or with a collapse spring. I
would try pulling the distributor as others suggested first but you're
probably going to have to pull the pan anyway. Good news is that it's
a one bananna job to replace the pump once the pan is off.

Here's hoping you see the blade on the end of the distributor shaft
gone/mangled (but spin the pump anyway).

On Tue, 23 Aug 2005 00:05:34 UTC "Earle Horton"
<nurse--NOSPAM--busters@msn.com> wrote:

> 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-
> >
> >
>
>


--
Will Honea

 

When mine went last summer it was as simple as the thin paper gasket
between the pump and the block blowing out - but that left me with
about half pressure, so I made it home. Outside possibility would be
a high pressure relief valve stuck open or with a collapse spring. I
would try pulling the distributor as others suggested first but you're
probably going to have to pull the pan anyway. Good news is that it's
a one bananna job to replace the pump once the pan is off.

Here's hoping you see the blade on the end of the distributor shaft
gone/mangled (but spin the pump anyway).

On Tue, 23 Aug 2005 00:05:34 UTC "Earle Horton"
<nurse--NOSPAM--busters@msn.com> wrote:

> 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-
> >
> >
>
>


--
Will Honea