Nick Hughes

I still don't see any wetness around the water pump. In any case,
I'll try changing it and it's seal. I changed the oil today and did
notice that it was very BLACK. I think it was changed around 4k ago,
but I have never seen it this black. No signs of white or milky oil.

Thanks

On Aug 4, 5:52 pm, Mike Romain <roma...@sympatico.ca> wrote:
> After you stop and it cools for a bit, reach down under the nose of the
> waterpump just behind the pulley to see if you can feel wet. If so, the
> pump seal is going.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> Nick ------ wrote:
> > Hi Folks,
>
> > My 2000 Jeep TJ 6CYL 4.0L has been leaking coolant for some time.
> > Originally, it appeared to leak from the top of the radiator. Given
> > this, I replaced the radiator. Then it started leaking from where the
> > lower hose connects to the radiator. I then tightened the hose on
> > with hose clamps. Now its still leaking from what appears to be the
> > front passenger side of the oil pan, between the gasket and the bottom
> > of the oil pan below the serpentine belt. I'm pretty sure the leak
> > isn't dripping from above hoses.
>
> > The Jeep has almost 150k miles on it. I suspected a bad water pump,
> > however there is no coolant leaking around the water pump gasket. I
> > pulled the oil stick and confirmed the oil is brown, not milky white.
> > When I changed the oil it didn't appear to have coolant mixed in. The
> > cylinders are not misfiring. It's leaking about 1/3 gallon of coolant
> > a drive.
>
> > Does anyone have suggestions on the root cause? I was going to
> > replace the water pump and thermostat, but the symptoms don't lead me
> > to believe they are at fault. It seems like an over-pressure problem.
>
> > Any insight is appreciated.
>
> > Thanks so much,
> > Nick

Nick Hughes

On Aug 4, 5:27 pm, d <wtami...@hotmail.com> wrote:
> On Sat, 04 Aug 2007 13:03:20 -0700, Nick ------ <nixon8...@gmail.com>
> wrote:
>
>
>
> >Hi Folks,
>
> >My 2000 Jeep TJ 6CYL 4.0L has been leaking coolant for some time.
> >Originally, it appeared to leak from the top of the radiator. Given
> >this, I replaced the radiator. Then it started leaking from where the
> >lower hose connects to the radiator. I then tightened the hose on
> >with hose clamps. Now its still leaking from what appears to be the
> >front passenger side of the oil pan, between the gasket and the bottom
> >of the oil pan below the serpentine belt. I'm pretty sure the leak
> >isn't dripping from above hoses.
>
> >The Jeep has almost 150k miles on it. I suspected a bad water pump,
> >however there is no coolant leaking around the water pump gasket. I
> >pulled the oil stick and confirmed the oil is brown, not milky white.
> >When I changed the oil it didn't appear to have coolant mixed in. The
> >cylinders are not misfiring. It's leaking about 1/3 gallon of coolant
> >a drive.
>
> >Does anyone have suggestions on the root cause? I was going to
> >replace the water pump and thermostat, but the symptoms don't lead me
> >to believe they are at fault. It seems like an over-pressure problem.
>
> >Any insight is appreciated.
>
> >Thanks so much,
> >Nick
>
> You might want to clean everything as best you can, then get a
> pressure tester and look for leaks. It goes on in place of your
> radiator cap and has a hand pump to pressurize your system. Places
> like AutoZone, etc. sometimes loans them out.
>
> Good luck
> Darrell

Thanks for the advice. I'll try the tester also.

Nick

Nick Hughes

On Aug 4, 5:27 pm, d <wtami...@hotmail.com> wrote:
> On Sat, 04 Aug 2007 13:03:20 -0700, Nick ------ <nixon8...@gmail.com>
> wrote:
>
>
>
> >Hi Folks,
>
> >My 2000 Jeep TJ 6CYL 4.0L has been leaking coolant for some time.
> >Originally, it appeared to leak from the top of the radiator. Given
> >this, I replaced the radiator. Then it started leaking from where the
> >lower hose connects to the radiator. I then tightened the hose on
> >with hose clamps. Now its still leaking from what appears to be the
> >front passenger side of the oil pan, between the gasket and the bottom
> >of the oil pan below the serpentine belt. I'm pretty sure the leak
> >isn't dripping from above hoses.
>
> >The Jeep has almost 150k miles on it. I suspected a bad water pump,
> >however there is no coolant leaking around the water pump gasket. I
> >pulled the oil stick and confirmed the oil is brown, not milky white.
> >When I changed the oil it didn't appear to have coolant mixed in. The
> >cylinders are not misfiring. It's leaking about 1/3 gallon of coolant
> >a drive.
>
> >Does anyone have suggestions on the root cause? I was going to
> >replace the water pump and thermostat, but the symptoms don't lead me
> >to believe they are at fault. It seems like an over-pressure problem.
>
> >Any insight is appreciated.
>
> >Thanks so much,
> >Nick
>
> You might want to clean everything as best you can, then get a
> pressure tester and look for leaks. It goes on in place of your
> radiator cap and has a hand pump to pressurize your system. Places
> like AutoZone, etc. sometimes loans them out.
>
> Good luck
> Darrell

Thanks for the advice. I'll try the tester also.

Nick

Nick Hughes

On Aug 4, 5:27 pm, d <wtami...@hotmail.com> wrote:
> On Sat, 04 Aug 2007 13:03:20 -0700, Nick ------ <nixon8...@gmail.com>
> wrote:
>
>
>
> >Hi Folks,
>
> >My 2000 Jeep TJ 6CYL 4.0L has been leaking coolant for some time.
> >Originally, it appeared to leak from the top of the radiator. Given
> >this, I replaced the radiator. Then it started leaking from where the
> >lower hose connects to the radiator. I then tightened the hose on
> >with hose clamps. Now its still leaking from what appears to be the
> >front passenger side of the oil pan, between the gasket and the bottom
> >of the oil pan below the serpentine belt. I'm pretty sure the leak
> >isn't dripping from above hoses.
>
> >The Jeep has almost 150k miles on it. I suspected a bad water pump,
> >however there is no coolant leaking around the water pump gasket. I
> >pulled the oil stick and confirmed the oil is brown, not milky white.
> >When I changed the oil it didn't appear to have coolant mixed in. The
> >cylinders are not misfiring. It's leaking about 1/3 gallon of coolant
> >a drive.
>
> >Does anyone have suggestions on the root cause? I was going to
> >replace the water pump and thermostat, but the symptoms don't lead me
> >to believe they are at fault. It seems like an over-pressure problem.
>
> >Any insight is appreciated.
>
> >Thanks so much,
> >Nick
>
> You might want to clean everything as best you can, then get a
> pressure tester and look for leaks. It goes on in place of your
> radiator cap and has a hand pump to pressurize your system. Places
> like AutoZone, etc. sometimes loans them out.
>
> Good luck
> Darrell

Thanks for the advice. I'll try the tester also.

Nick

Nick Hughes

On Aug 4, 5:27 pm, d <wtami...@hotmail.com> wrote:
> On Sat, 04 Aug 2007 13:03:20 -0700, Nick ------ <nixon8...@gmail.com>
> wrote:
>
>
>
> >Hi Folks,
>
> >My 2000 Jeep TJ 6CYL 4.0L has been leaking coolant for some time.
> >Originally, it appeared to leak from the top of the radiator. Given
> >this, I replaced the radiator. Then it started leaking from where the
> >lower hose connects to the radiator. I then tightened the hose on
> >with hose clamps. Now its still leaking from what appears to be the
> >front passenger side of the oil pan, between the gasket and the bottom
> >of the oil pan below the serpentine belt. I'm pretty sure the leak
> >isn't dripping from above hoses.
>
> >The Jeep has almost 150k miles on it. I suspected a bad water pump,
> >however there is no coolant leaking around the water pump gasket. I
> >pulled the oil stick and confirmed the oil is brown, not milky white.
> >When I changed the oil it didn't appear to have coolant mixed in. The
> >cylinders are not misfiring. It's leaking about 1/3 gallon of coolant
> >a drive.
>
> >Does anyone have suggestions on the root cause? I was going to
> >replace the water pump and thermostat, but the symptoms don't lead me
> >to believe they are at fault. It seems like an over-pressure problem.
>
> >Any insight is appreciated.
>
> >Thanks so much,
> >Nick
>
> You might want to clean everything as best you can, then get a
> pressure tester and look for leaks. It goes on in place of your
> radiator cap and has a hand pump to pressurize your system. Places
> like AutoZone, etc. sometimes loans them out.
>
> Good luck
> Darrell

Thanks for the advice. I'll try the tester also.

Nick

T. Greening

Nick ------ wrote:
> I still don't see any wetness around the water pump. In any case,
> I'll try changing it and it's seal. I changed the oil today and did
> notice that it was very BLACK. I think it was changed around 4k ago,
> but I have never seen it this black. No signs of white or milky oil.
>
> Thanks
>


I used to have a big dually chevy with a 454. On a trip to maine it
started overheating and when I checked the radiator fluid it was way
low. I go hmmm, refill and boogie on down the road only to overheat
again, find the fluid low again, and this time radiator fluid all over
the engine and underside of the hood. Radiator cap - tight, but loosen
and retighten anyway. Hoses - intact. Water pump - not visibly leaking.

I refilled yet again and this time run the motor for a good 20 minutes
looking for leaks and none to be found, so head on down the road and tan
my hide if it doesn't happen again. I refill everything, run threw all
the checks again and stand there watching the motor run and not leak
while scratching my head. Finally I reach a foot in the door and start
bringing the rpm up while watching under the hood. Nothing at idle,
nothing at 1500 rpm, 2000 rpm, 2500, 3000 and bingo, the upper radiator
hose starts emitting a nice little stream of fluid from a pinhole.

New hose and I'm a happy camper headed on down the road. Happy that is
until some Nanny from Israel loses control of her bosses rice burner and
side swipes my nice purdy truck just outside of boston. Other than all
that it was a good trip.



The point is your water has to be going somewhere. It is either leaking
from the hose, radiator, water pump, or head (does a tj have a water
cooled intake?). If it's not escaping there then it's going in the oil
(which you say it is not) or it's going up in smoke out the exhaust,
which means maybe a bad head gasket or worse, cracked head. A bad head
gasket could allow it to directly leak out of the motor as well. Don't
just inspect around the water pump/radiator area. Look for water stains
down the side of the block.

If you are losing that much water each trip AND it was in the exhaust
it should be fairly easy to tell, since your exhaust should be visibly
white. Think fog coming out your tail pipe. Likewise easily visible in
your oil.

T. Greening

Nick ------ wrote:
> I still don't see any wetness around the water pump. In any case,
> I'll try changing it and it's seal. I changed the oil today and did
> notice that it was very BLACK. I think it was changed around 4k ago,
> but I have never seen it this black. No signs of white or milky oil.
>
> Thanks
>


I used to have a big dually chevy with a 454. On a trip to maine it
started overheating and when I checked the radiator fluid it was way
low. I go hmmm, refill and boogie on down the road only to overheat
again, find the fluid low again, and this time radiator fluid all over
the engine and underside of the hood. Radiator cap - tight, but loosen
and retighten anyway. Hoses - intact. Water pump - not visibly leaking.

I refilled yet again and this time run the motor for a good 20 minutes
looking for leaks and none to be found, so head on down the road and tan
my hide if it doesn't happen again. I refill everything, run threw all
the checks again and stand there watching the motor run and not leak
while scratching my head. Finally I reach a foot in the door and start
bringing the rpm up while watching under the hood. Nothing at idle,
nothing at 1500 rpm, 2000 rpm, 2500, 3000 and bingo, the upper radiator
hose starts emitting a nice little stream of fluid from a pinhole.

New hose and I'm a happy camper headed on down the road. Happy that is
until some Nanny from Israel loses control of her bosses rice burner and
side swipes my nice purdy truck just outside of boston. Other than all
that it was a good trip.



The point is your water has to be going somewhere. It is either leaking
from the hose, radiator, water pump, or head (does a tj have a water
cooled intake?). If it's not escaping there then it's going in the oil
(which you say it is not) or it's going up in smoke out the exhaust,
which means maybe a bad head gasket or worse, cracked head. A bad head
gasket could allow it to directly leak out of the motor as well. Don't
just inspect around the water pump/radiator area. Look for water stains
down the side of the block.

If you are losing that much water each trip AND it was in the exhaust
it should be fairly easy to tell, since your exhaust should be visibly
white. Think fog coming out your tail pipe. Likewise easily visible in
your oil.

T. Greening

Nick ------ wrote:
> I still don't see any wetness around the water pump. In any case,
> I'll try changing it and it's seal. I changed the oil today and did
> notice that it was very BLACK. I think it was changed around 4k ago,
> but I have never seen it this black. No signs of white or milky oil.
>
> Thanks
>


I used to have a big dually chevy with a 454. On a trip to maine it
started overheating and when I checked the radiator fluid it was way
low. I go hmmm, refill and boogie on down the road only to overheat
again, find the fluid low again, and this time radiator fluid all over
the engine and underside of the hood. Radiator cap - tight, but loosen
and retighten anyway. Hoses - intact. Water pump - not visibly leaking.

I refilled yet again and this time run the motor for a good 20 minutes
looking for leaks and none to be found, so head on down the road and tan
my hide if it doesn't happen again. I refill everything, run threw all
the checks again and stand there watching the motor run and not leak
while scratching my head. Finally I reach a foot in the door and start
bringing the rpm up while watching under the hood. Nothing at idle,
nothing at 1500 rpm, 2000 rpm, 2500, 3000 and bingo, the upper radiator
hose starts emitting a nice little stream of fluid from a pinhole.

New hose and I'm a happy camper headed on down the road. Happy that is
until some Nanny from Israel loses control of her bosses rice burner and
side swipes my nice purdy truck just outside of boston. Other than all
that it was a good trip.



The point is your water has to be going somewhere. It is either leaking
from the hose, radiator, water pump, or head (does a tj have a water
cooled intake?). If it's not escaping there then it's going in the oil
(which you say it is not) or it's going up in smoke out the exhaust,
which means maybe a bad head gasket or worse, cracked head. A bad head
gasket could allow it to directly leak out of the motor as well. Don't
just inspect around the water pump/radiator area. Look for water stains
down the side of the block.

If you are losing that much water each trip AND it was in the exhaust
it should be fairly easy to tell, since your exhaust should be visibly
white. Think fog coming out your tail pipe. Likewise easily visible in
your oil.

T. Greening

Nick ------ wrote:
> I still don't see any wetness around the water pump. In any case,
> I'll try changing it and it's seal. I changed the oil today and did
> notice that it was very BLACK. I think it was changed around 4k ago,
> but I have never seen it this black. No signs of white or milky oil.
>
> Thanks
>


I used to have a big dually chevy with a 454. On a trip to maine it
started overheating and when I checked the radiator fluid it was way
low. I go hmmm, refill and boogie on down the road only to overheat
again, find the fluid low again, and this time radiator fluid all over
the engine and underside of the hood. Radiator cap - tight, but loosen
and retighten anyway. Hoses - intact. Water pump - not visibly leaking.

I refilled yet again and this time run the motor for a good 20 minutes
looking for leaks and none to be found, so head on down the road and tan
my hide if it doesn't happen again. I refill everything, run threw all
the checks again and stand there watching the motor run and not leak
while scratching my head. Finally I reach a foot in the door and start
bringing the rpm up while watching under the hood. Nothing at idle,
nothing at 1500 rpm, 2000 rpm, 2500, 3000 and bingo, the upper radiator
hose starts emitting a nice little stream of fluid from a pinhole.

New hose and I'm a happy camper headed on down the road. Happy that is
until some Nanny from Israel loses control of her bosses rice burner and
side swipes my nice purdy truck just outside of boston. Other than all
that it was a good trip.



The point is your water has to be going somewhere. It is either leaking
from the hose, radiator, water pump, or head (does a tj have a water
cooled intake?). If it's not escaping there then it's going in the oil
(which you say it is not) or it's going up in smoke out the exhaust,
which means maybe a bad head gasket or worse, cracked head. A bad head
gasket could allow it to directly leak out of the motor as well. Don't
just inspect around the water pump/radiator area. Look for water stains
down the side of the block.

If you are losing that much water each trip AND it was in the exhaust
it should be fairly easy to tell, since your exhaust should be visibly
white. Think fog coming out your tail pipe. Likewise easily visible in
your oil.

Mike Romain

T. Greening wrote:
Nothing at idle,
> nothing at 1500 rpm, 2000 rpm, 2500, 3000 and bingo, the upper radiator
> hose starts emitting a nice little stream of fluid from a pinhole.

I have had the same thing happen. I figured it out when my battery on
the firewall kept getting wet with coolant.

Mike