Re: Over heating 4.0L
 

On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
<dc.ollivier@sympatico.ca> wrote:

>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
>the thermostat and refilled. Still overheats. I thought that maybe it
>could be an air lock or something, but after playing with the system I can't
>seem to get it any better. I tried burping the system by cracking the hoses
>open one at a time and allowing some air out but it did not seem to help.
>It does not seem like there is any flow in the upper hose at all, but there
>is coolant in it. Any other check for a waterpump before I throw parts at
>it. There is no leaking fluid anywhere in the system, the shaft on the pump
>also feels fine. Any help would be appreciated. Dave.

Do you have a 2'nd electric fan? Is it kicking on at all?
also did you check for actual flow of fluid? I have seen an old water
pump that looked fine from the outside but the vanes were pretty much
corroded right down to stumps and it really wasn't moving any water.


Drifter
"I've been here, I've been there..."

Re: Over heating 4.0L
 

On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
<dc.ollivier@sympatico.ca> wrote:

>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
>the thermostat and refilled. Still overheats. I thought that maybe it
>could be an air lock or something, but after playing with the system I can't
>seem to get it any better. I tried burping the system by cracking the hoses
>open one at a time and allowing some air out but it did not seem to help.
>It does not seem like there is any flow in the upper hose at all, but there
>is coolant in it. Any other check for a waterpump before I throw parts at
>it. There is no leaking fluid anywhere in the system, the shaft on the pump
>also feels fine. Any help would be appreciated. Dave.

Do you have a 2'nd electric fan? Is it kicking on at all?
also did you check for actual flow of fluid? I have seen an old water
pump that looked fine from the outside but the vanes were pretty much
corroded right down to stumps and it really wasn't moving any water.


Drifter
"I've been here, I've been there..."

Re: Over heating 4.0L
 

On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
<dc.ollivier@sympatico.ca> wrote:

>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
>the thermostat and refilled. Still overheats. I thought that maybe it
>could be an air lock or something, but after playing with the system I can't
>seem to get it any better. I tried burping the system by cracking the hoses
>open one at a time and allowing some air out but it did not seem to help.
>It does not seem like there is any flow in the upper hose at all, but there
>is coolant in it. Any other check for a waterpump before I throw parts at
>it. There is no leaking fluid anywhere in the system, the shaft on the pump
>also feels fine. Any help would be appreciated. Dave.

Do you have a 2'nd electric fan? Is it kicking on at all?
also did you check for actual flow of fluid? I have seen an old water
pump that looked fine from the outside but the vanes were pretty much
corroded right down to stumps and it really wasn't moving any water.


Drifter
"I've been here, I've been there..."

Re: Over heating 4.0L
 

If you can't see the coolant flow, at normal operating temperature,
than I would check that it's not upside down, the big end always goes
towards the block as pictured at:
http://go.jeep-xj.info/HowtoWaterpump.htm If good, take the thermostat
out and test it with wife's turkey thermometer in a pan of water on the
stove.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

dcollivier wrote:
>
> 90 Cherokee 4.0L back on road after winter, it now overheats. I changed
> the thermostat and refilled. Still overheats. I thought that maybe it
> could be an air lock or something, but after playing with the system I can't
> seem to get it any better. I tried burping the system by cracking the hoses
> open one at a time and allowing some air out but it did not seem to help.
> It does not seem like there is any flow in the upper hose at all, but there
> is coolant in it. Any other check for a waterpump before I throw parts at
> it. There is no leaking fluid anywhere in the system, the shaft on the pump
> also feels fine. Any help would be appreciated. Dave.

Re: Over heating 4.0L
 

If you can't see the coolant flow, at normal operating temperature,
than I would check that it's not upside down, the big end always goes
towards the block as pictured at:
http://go.jeep-xj.info/HowtoWaterpump.htm If good, take the thermostat
out and test it with wife's turkey thermometer in a pan of water on the
stove.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

dcollivier wrote:
>
> 90 Cherokee 4.0L back on road after winter, it now overheats. I changed
> the thermostat and refilled. Still overheats. I thought that maybe it
> could be an air lock or something, but after playing with the system I can't
> seem to get it any better. I tried burping the system by cracking the hoses
> open one at a time and allowing some air out but it did not seem to help.
> It does not seem like there is any flow in the upper hose at all, but there
> is coolant in it. Any other check for a waterpump before I throw parts at
> it. There is no leaking fluid anywhere in the system, the shaft on the pump
> also feels fine. Any help would be appreciated. Dave.

Re: Over heating 4.0L
 

If you can't see the coolant flow, at normal operating temperature,
than I would check that it's not upside down, the big end always goes
towards the block as pictured at:
http://go.jeep-xj.info/HowtoWaterpump.htm If good, take the thermostat
out and test it with wife's turkey thermometer in a pan of water on the
stove.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

dcollivier wrote:
>
> 90 Cherokee 4.0L back on road after winter, it now overheats. I changed
> the thermostat and refilled. Still overheats. I thought that maybe it
> could be an air lock or something, but after playing with the system I can't
> seem to get it any better. I tried burping the system by cracking the hoses
> open one at a time and allowing some air out but it did not seem to help.
> It does not seem like there is any flow in the upper hose at all, but there
> is coolant in it. Any other check for a waterpump before I throw parts at
> it. There is no leaking fluid anywhere in the system, the shaft on the pump
> also feels fine. Any help would be appreciated. Dave.

Re: Over heating 4.0L
 

If you can't see the coolant flow, at normal operating temperature,
than I would check that it's not upside down, the big end always goes
towards the block as pictured at:
http://go.jeep-xj.info/HowtoWaterpump.htm If good, take the thermostat
out and test it with wife's turkey thermometer in a pan of water on the
stove.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

dcollivier wrote:
>
> 90 Cherokee 4.0L back on road after winter, it now overheats. I changed
> the thermostat and refilled. Still overheats. I thought that maybe it
> could be an air lock or something, but after playing with the system I can't
> seem to get it any better. I tried burping the system by cracking the hoses
> open one at a time and allowing some air out but it did not seem to help.
> It does not seem like there is any flow in the upper hose at all, but there
> is coolant in it. Any other check for a waterpump before I throw parts at
> it. There is no leaking fluid anywhere in the system, the shaft on the pump
> also feels fine. Any help would be appreciated. Dave.

Re: Over heating 4.0L
 

Just to chime in - this is what was wrong last time when mine started to
overhear - electric fan was shot and wasn't kicking in...

Paul

"Drifter" <zespectre@askme.com> wrote in message
news:k9dg71hououlmrmeljs10m7a98bbajnpj1@4ax.com...
> On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
> <dc.ollivier@sympatico.ca> wrote:
>
>>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
>>the thermostat and refilled. Still overheats. I thought that maybe it
>>could be an air lock or something, but after playing with the system I
>>can't
>>seem to get it any better. I tried burping the system by cracking the
>>hoses
>>open one at a time and allowing some air out but it did not seem to help.
>>It does not seem like there is any flow in the upper hose at all, but
>>there
>>is coolant in it. Any other check for a waterpump before I throw parts at
>>it. There is no leaking fluid anywhere in the system, the shaft on the
>>pump
>>also feels fine. Any help would be appreciated. Dave.
>
> Do you have a 2'nd electric fan? Is it kicking on at all?
> also did you check for actual flow of fluid? I have seen an old water
> pump that looked fine from the outside but the vanes were pretty much
> corroded right down to stumps and it really wasn't moving any water.
>
>
> Drifter
> "I've been here, I've been there..."

Re: Over heating 4.0L
 

Just to chime in - this is what was wrong last time when mine started to
overhear - electric fan was shot and wasn't kicking in...

Paul

"Drifter" <zespectre@askme.com> wrote in message
news:k9dg71hououlmrmeljs10m7a98bbajnpj1@4ax.com...
> On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
> <dc.ollivier@sympatico.ca> wrote:
>
>>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
>>the thermostat and refilled. Still overheats. I thought that maybe it
>>could be an air lock or something, but after playing with the system I
>>can't
>>seem to get it any better. I tried burping the system by cracking the
>>hoses
>>open one at a time and allowing some air out but it did not seem to help.
>>It does not seem like there is any flow in the upper hose at all, but
>>there
>>is coolant in it. Any other check for a waterpump before I throw parts at
>>it. There is no leaking fluid anywhere in the system, the shaft on the
>>pump
>>also feels fine. Any help would be appreciated. Dave.
>
> Do you have a 2'nd electric fan? Is it kicking on at all?
> also did you check for actual flow of fluid? I have seen an old water
> pump that looked fine from the outside but the vanes were pretty much
> corroded right down to stumps and it really wasn't moving any water.
>
>
> Drifter
> "I've been here, I've been there..."

Re: Over heating 4.0L
 

Just to chime in - this is what was wrong last time when mine started to
overhear - electric fan was shot and wasn't kicking in...

Paul

"Drifter" <zespectre@askme.com> wrote in message
news:k9dg71hououlmrmeljs10m7a98bbajnpj1@4ax.com...
> On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
> <dc.ollivier@sympatico.ca> wrote:
>
>>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
>>the thermostat and refilled. Still overheats. I thought that maybe it
>>could be an air lock or something, but after playing with the system I
>>can't
>>seem to get it any better. I tried burping the system by cracking the
>>hoses
>>open one at a time and allowing some air out but it did not seem to help.
>>It does not seem like there is any flow in the upper hose at all, but
>>there
>>is coolant in it. Any other check for a waterpump before I throw parts at
>>it. There is no leaking fluid anywhere in the system, the shaft on the
>>pump
>>also feels fine. Any help would be appreciated. Dave.
>
> Do you have a 2'nd electric fan? Is it kicking on at all?
> also did you check for actual flow of fluid? I have seen an old water
> pump that looked fine from the outside but the vanes were pretty much
> corroded right down to stumps and it really wasn't moving any water.
>
>
> Drifter
> "I've been here, I've been there..."