86 Cherokee overheating problem
 

Good evening,
I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
overheating problem. I just purchased it as a basket case and am trying to
get it back on the road again. I found that there were two bad valves in
the number two cylinder. The intake valve was burned through with a large
grove across the face. The exhaust valve had gotten so hot that it had
Cupped and sat too low in the seat. The head had a complete professional
valve job and was shaved slightly to ensure it was not warped. After it was
installed the engine ran rich and I found a hose was disconnected from the
Mapp sensor. I also found that someone had installed the wrong O2 sensor
and it was replaced with the correct one. The radiator has been flushed a
couple of times and now seems clean. There is a slight leak in the radiator
between the converter and muffler. It seems to idle fine but has a
sluggish pickup in engine RPM. Also backfires once in a while and wants to
get hot climbing even a small hill. Timing seems to be slightly higher than
12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
any information as to the correct hose connections that had to be removed
when doing the valve job. All seem to be correct but cannot tell for sure.
Can you advise any other areas to check and perhaps point me to a site where
the hose diagram might be found? Thanks Don Smith





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Re: 86 Cherokee overheating problem
 

Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
real bad. A new one with more rows of tubes was like $135 at a local parts
store. Yours, if original, most likely has one row being a four cylinder. Also
could be the fan clutch if it has one.

JoBo

"Don Smith" <desmith@innercite.com> wrote in message
news:10hs8sgt6ct7s01@corp.supernews.com...
> Good evening,
> I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> overheating problem. I just purchased it as a basket case and am trying to
> get it back on the road again. I found that there were two bad valves in
> the number two cylinder. The intake valve was burned through with a large
> grove across the face. The exhaust valve had gotten so hot that it had
> Cupped and sat too low in the seat. The head had a complete professional
> valve job and was shaved slightly to ensure it was not warped. After it was
> installed the engine ran rich and I found a hose was disconnected from the
> Mapp sensor. I also found that someone had installed the wrong O2 sensor
> and it was replaced with the correct one. The radiator has been flushed a
> couple of times and now seems clean. There is a slight leak in the radiator
> between the converter and muffler. It seems to idle fine but has a
> sluggish pickup in engine RPM. Also backfires once in a while and wants to
> get hot climbing even a small hill. Timing seems to be slightly higher than
> 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> any information as to the correct hose connections that had to be removed
> when doing the valve job. All seem to be correct but cannot tell for sure.
> Can you advise any other areas to check and perhaps point me to a site where
> the hose diagram might be found? Thanks Don Smith
>
>
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
>
>

Re: 86 Cherokee overheating problem
 

Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
real bad. A new one with more rows of tubes was like $135 at a local parts
store. Yours, if original, most likely has one row being a four cylinder. Also
could be the fan clutch if it has one.

JoBo

"Don Smith" <desmith@innercite.com> wrote in message
news:10hs8sgt6ct7s01@corp.supernews.com...
> Good evening,
> I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> overheating problem. I just purchased it as a basket case and am trying to
> get it back on the road again. I found that there were two bad valves in
> the number two cylinder. The intake valve was burned through with a large
> grove across the face. The exhaust valve had gotten so hot that it had
> Cupped and sat too low in the seat. The head had a complete professional
> valve job and was shaved slightly to ensure it was not warped. After it was
> installed the engine ran rich and I found a hose was disconnected from the
> Mapp sensor. I also found that someone had installed the wrong O2 sensor
> and it was replaced with the correct one. The radiator has been flushed a
> couple of times and now seems clean. There is a slight leak in the radiator
> between the converter and muffler. It seems to idle fine but has a
> sluggish pickup in engine RPM. Also backfires once in a while and wants to
> get hot climbing even a small hill. Timing seems to be slightly higher than
> 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> any information as to the correct hose connections that had to be removed
> when doing the valve job. All seem to be correct but cannot tell for sure.
> Can you advise any other areas to check and perhaps point me to a site where
> the hose diagram might be found? Thanks Don Smith
>
>
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
>
>

Re: 86 Cherokee overheating problem
 

Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
real bad. A new one with more rows of tubes was like $135 at a local parts
store. Yours, if original, most likely has one row being a four cylinder. Also
could be the fan clutch if it has one.

JoBo

"Don Smith" <desmith@innercite.com> wrote in message
news:10hs8sgt6ct7s01@corp.supernews.com...
> Good evening,
> I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> overheating problem. I just purchased it as a basket case and am trying to
> get it back on the road again. I found that there were two bad valves in
> the number two cylinder. The intake valve was burned through with a large
> grove across the face. The exhaust valve had gotten so hot that it had
> Cupped and sat too low in the seat. The head had a complete professional
> valve job and was shaved slightly to ensure it was not warped. After it was
> installed the engine ran rich and I found a hose was disconnected from the
> Mapp sensor. I also found that someone had installed the wrong O2 sensor
> and it was replaced with the correct one. The radiator has been flushed a
> couple of times and now seems clean. There is a slight leak in the radiator
> between the converter and muffler. It seems to idle fine but has a
> sluggish pickup in engine RPM. Also backfires once in a while and wants to
> get hot climbing even a small hill. Timing seems to be slightly higher than
> 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> any information as to the correct hose connections that had to be removed
> when doing the valve job. All seem to be correct but cannot tell for sure.
> Can you advise any other areas to check and perhaps point me to a site where
> the hose diagram might be found? Thanks Don Smith
>
>
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
>
>

Re: 86 Cherokee overheating problem
 

Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
real bad. A new one with more rows of tubes was like $135 at a local parts
store. Yours, if original, most likely has one row being a four cylinder. Also
could be the fan clutch if it has one.

JoBo

"Don Smith" <desmith@innercite.com> wrote in message
news:10hs8sgt6ct7s01@corp.supernews.com...
> Good evening,
> I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> overheating problem. I just purchased it as a basket case and am trying to
> get it back on the road again. I found that there were two bad valves in
> the number two cylinder. The intake valve was burned through with a large
> grove across the face. The exhaust valve had gotten so hot that it had
> Cupped and sat too low in the seat. The head had a complete professional
> valve job and was shaved slightly to ensure it was not warped. After it was
> installed the engine ran rich and I found a hose was disconnected from the
> Mapp sensor. I also found that someone had installed the wrong O2 sensor
> and it was replaced with the correct one. The radiator has been flushed a
> couple of times and now seems clean. There is a slight leak in the radiator
> between the converter and muffler. It seems to idle fine but has a
> sluggish pickup in engine RPM. Also backfires once in a while and wants to
> get hot climbing even a small hill. Timing seems to be slightly higher than
> 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> any information as to the correct hose connections that had to be removed
> when doing the valve job. All seem to be correct but cannot tell for sure.
> Can you advise any other areas to check and perhaps point me to a site where
> the hose diagram might be found? Thanks Don Smith
>
>
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
>
>

Re: 86 Cherokee overheating problem
 

I am thinking fan clutch as well on something that age.

If it is hot and you shut it down, the fan should stop almost
instantly. If it keeps on spinning, the clutch is done.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jo Bo wrote:
>
> Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
> real bad. A new one with more rows of tubes was like $135 at a local parts
> store. Yours, if original, most likely has one row being a four cylinder. Also
> could be the fan clutch if it has one.
>
> JoBo
>
> "Don Smith" <desmith@innercite.com> wrote in message
> news:10hs8sgt6ct7s01@corp.supernews.com...
> > Good evening,
> > I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> > overheating problem. I just purchased it as a basket case and am trying to
> > get it back on the road again. I found that there were two bad valves in
> > the number two cylinder. The intake valve was burned through with a large
> > grove across the face. The exhaust valve had gotten so hot that it had
> > Cupped and sat too low in the seat. The head had a complete professional
> > valve job and was shaved slightly to ensure it was not warped. After it was
> > installed the engine ran rich and I found a hose was disconnected from the
> > Mapp sensor. I also found that someone had installed the wrong O2 sensor
> > and it was replaced with the correct one. The radiator has been flushed a
> > couple of times and now seems clean. There is a slight leak in the radiator
> > between the converter and muffler. It seems to idle fine but has a
> > sluggish pickup in engine RPM. Also backfires once in a while and wants to
> > get hot climbing even a small hill. Timing seems to be slightly higher than
> > 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> > any information as to the correct hose connections that had to be removed
> > when doing the valve job. All seem to be correct but cannot tell for sure.
> > Can you advise any other areas to check and perhaps point me to a site where
> > the hose diagram might be found? Thanks Don Smith
> >
> >
> >
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
> >
> >

Re: 86 Cherokee overheating problem
 

I am thinking fan clutch as well on something that age.

If it is hot and you shut it down, the fan should stop almost
instantly. If it keeps on spinning, the clutch is done.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jo Bo wrote:
>
> Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
> real bad. A new one with more rows of tubes was like $135 at a local parts
> store. Yours, if original, most likely has one row being a four cylinder. Also
> could be the fan clutch if it has one.
>
> JoBo
>
> "Don Smith" <desmith@innercite.com> wrote in message
> news:10hs8sgt6ct7s01@corp.supernews.com...
> > Good evening,
> > I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> > overheating problem. I just purchased it as a basket case and am trying to
> > get it back on the road again. I found that there were two bad valves in
> > the number two cylinder. The intake valve was burned through with a large
> > grove across the face. The exhaust valve had gotten so hot that it had
> > Cupped and sat too low in the seat. The head had a complete professional
> > valve job and was shaved slightly to ensure it was not warped. After it was
> > installed the engine ran rich and I found a hose was disconnected from the
> > Mapp sensor. I also found that someone had installed the wrong O2 sensor
> > and it was replaced with the correct one. The radiator has been flushed a
> > couple of times and now seems clean. There is a slight leak in the radiator
> > between the converter and muffler. It seems to idle fine but has a
> > sluggish pickup in engine RPM. Also backfires once in a while and wants to
> > get hot climbing even a small hill. Timing seems to be slightly higher than
> > 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> > any information as to the correct hose connections that had to be removed
> > when doing the valve job. All seem to be correct but cannot tell for sure.
> > Can you advise any other areas to check and perhaps point me to a site where
> > the hose diagram might be found? Thanks Don Smith
> >
> >
> >
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
> >
> >

Re: 86 Cherokee overheating problem
 

I am thinking fan clutch as well on something that age.

If it is hot and you shut it down, the fan should stop almost
instantly. If it keeps on spinning, the clutch is done.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jo Bo wrote:
>
> Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
> real bad. A new one with more rows of tubes was like $135 at a local parts
> store. Yours, if original, most likely has one row being a four cylinder. Also
> could be the fan clutch if it has one.
>
> JoBo
>
> "Don Smith" <desmith@innercite.com> wrote in message
> news:10hs8sgt6ct7s01@corp.supernews.com...
> > Good evening,
> > I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> > overheating problem. I just purchased it as a basket case and am trying to
> > get it back on the road again. I found that there were two bad valves in
> > the number two cylinder. The intake valve was burned through with a large
> > grove across the face. The exhaust valve had gotten so hot that it had
> > Cupped and sat too low in the seat. The head had a complete professional
> > valve job and was shaved slightly to ensure it was not warped. After it was
> > installed the engine ran rich and I found a hose was disconnected from the
> > Mapp sensor. I also found that someone had installed the wrong O2 sensor
> > and it was replaced with the correct one. The radiator has been flushed a
> > couple of times and now seems clean. There is a slight leak in the radiator
> > between the converter and muffler. It seems to idle fine but has a
> > sluggish pickup in engine RPM. Also backfires once in a while and wants to
> > get hot climbing even a small hill. Timing seems to be slightly higher than
> > 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> > any information as to the correct hose connections that had to be removed
> > when doing the valve job. All seem to be correct but cannot tell for sure.
> > Can you advise any other areas to check and perhaps point me to a site where
> > the hose diagram might be found? Thanks Don Smith
> >
> >
> >
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
> >
> >

Re: 86 Cherokee overheating problem
 

I am thinking fan clutch as well on something that age.

If it is hot and you shut it down, the fan should stop almost
instantly. If it keeps on spinning, the clutch is done.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jo Bo wrote:
>
> Take a good look at your radiator. The one on my 89 Cherokee 4.0L was rotted
> real bad. A new one with more rows of tubes was like $135 at a local parts
> store. Yours, if original, most likely has one row being a four cylinder. Also
> could be the fan clutch if it has one.
>
> JoBo
>
> "Don Smith" <desmith@innercite.com> wrote in message
> news:10hs8sgt6ct7s01@corp.supernews.com...
> > Good evening,
> > I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> > overheating problem. I just purchased it as a basket case and am trying to
> > get it back on the road again. I found that there were two bad valves in
> > the number two cylinder. The intake valve was burned through with a large
> > grove across the face. The exhaust valve had gotten so hot that it had
> > Cupped and sat too low in the seat. The head had a complete professional
> > valve job and was shaved slightly to ensure it was not warped. After it was
> > installed the engine ran rich and I found a hose was disconnected from the
> > Mapp sensor. I also found that someone had installed the wrong O2 sensor
> > and it was replaced with the correct one. The radiator has been flushed a
> > couple of times and now seems clean. There is a slight leak in the radiator
> > between the converter and muffler. It seems to idle fine but has a
> > sluggish pickup in engine RPM. Also backfires once in a while and wants to
> > get hot climbing even a small hill. Timing seems to be slightly higher than
> > 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to find
> > any information as to the correct hose connections that had to be removed
> > when doing the valve job. All seem to be correct but cannot tell for sure.
> > Can you advise any other areas to check and perhaps point me to a site where
> > the hose diagram might be found? Thanks Don Smith
> >
> >
> >
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
> >
> >

Re: 86 Cherokee overheating problem
 

Thank you JoBo and Mike for your input. Still working on the problem of
overheating. Also seems to not getting full power under load. It Bogs down
going up a hill and seems to have problems during the lower range of the
Rpms. The Fan clutch seems to be fine. Has the same stiffness in it when
hot as when cold. I did notice that the water seemed to flow into the
radiator faster than out when revving up the engine a bit. It came up thru
the cap every time I increased the engine's Rpms It is a one row radiator
but looks real clean inside and a small wire easily passes thru the tubes I
can get to under the cap area. Tried to ask the Jeep Creep for help but so
far he has not responded. Any help would be appreciated. Thanks Don
"Don Smith" <desmith@innercite.com> wrote in message
news:10hs8sgt6ct7s01@corp.supernews.com...
> Good evening,
> I have a 1986 Jeep Cherokee Pioneer with a 2.46L 4-150 engine with an
> overheating problem. I just purchased it as a basket case and am trying
to
> get it back on the road again. I found that there were two bad valves in
> the number two cylinder. The intake valve was burned through with a large
> grove across the face. The exhaust valve had gotten so hot that it had
> Cupped and sat too low in the seat. The head had a complete professional
> valve job and was shaved slightly to ensure it was not warped. After it
was
> installed the engine ran rich and I found a hose was disconnected from the
> Mapp sensor. I also found that someone had installed the wrong O2 sensor
> and it was replaced with the correct one. The radiator has been flushed a
> couple of times and now seems clean. There is a slight leak in the
radiator
> between the converter and muffler. It seems to idle fine but has a
> sluggish pickup in engine RPM. Also backfires once in a while and wants
to
> get hot climbing even a small hill. Timing seems to be slightly higher
than
> 12 BTDC. Have not checked the fuel filter as of yet. I cannot seem to
find
> any information as to the correct hose connections that had to be removed
> when doing the valve job. All seem to be correct but cannot tell for
sure.
> Can you advise any other areas to check and perhaps point me to a site
where
> the hose diagram might be found? Thanks Don Smith
>
>
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.735 / Virus Database: 489 - Release Date: 8/11/04
>
>


---
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