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Old 09-22-2005, 21:01   #1 (permalink)
Ford Warrior
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Overheating and slight rumble when driving over 55mph

I just purchased a 1995 Ford E250 cargo van with 4.9L I6 and 3-speed auto.
Everything seems to run fine and all fluid levels are up where they should
be. No fluid is leaking. Tranny fluid is red, radiator fluid is green, oil
is still somewhat clear. Prior to purchasing this vehicle a new temperature
gauge was installed as the old one had stopped working. Fluid gauge
indicates just below the 'high' level.

The fan on the radiator is running fine. The vehicle drives fine with no
problems until I get on the highway and get it over 55 mph. At this speed a
deep low rumbling sound is felt/heard and the temperature gauge steadily
increases and approaches the red after about 10 minutes of driving around
60-65. Strangely the low rumbling sound stops if I exceed around 65mph..
I'm assuming this is where the tranny shifts into 3rd? Sometimes when
accelerating rapidly I can actually see the temp gauge jumping up. After I
get off the highway and drop down to usual street speed the temperature
goes back into the normal middle level after a few minutes. I pop the hood
and can feel the heat coming off the engine but It's not to the point that
there is smoke or steam or anything like that but I haven't driven it all
the way into the red! I'm no mechanic and only have a basic knowledge of
repairs. I'd appreciate any help as to where I should start. My
uninformed newbie guesses would lead me to look into a new radiator or
something involving the transmission. I just ordered a printed Haynes
repair manual and the Ford factory service manuals on CD hoping these may
help. I bought this van with no warranty 'as is' so I'm stuck dealing with
the problems myself and appreciate any pointers.

Thanks
Jay

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Old 09-23-2005, 07:01   #2 (permalink)
TheSnoMan
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Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

Ford Warrior wrote:
> I just purchased a 1995 Ford E250 cargo van with 4.9L I6 and 3-speed auto.
> Everything seems to run fine and all fluid levels are up where they should
> be. No fluid is leaking. Tranny fluid is red, radiator fluid is green, oil
> is still somewhat clear. Prior to purchasing this vehicle a new temperature
> gauge was installed as the old one had stopped working. Fluid gauge
> indicates just below the 'high' level.
>
> The fan on the radiator is running fine. The vehicle drives fine with no
> problems until I get on the highway and get it over 55 mph. At this speed a
> deep low rumbling sound is felt/heard and the temperature gauge steadily
> increases and approaches the red after about 10 minutes of driving around
> 60-65. Strangely the low rumbling sound stops if I exceed around 65mph..
> I'm assuming this is where the tranny shifts into 3rd? Sometimes when
> accelerating rapidly I can actually see the temp gauge jumping up. After I
> get off the highway and drop down to usual street speed the temperature
> goes back into the normal middle level after a few minutes. I pop the hood
> and can feel the heat coming off the engine but It's not to the point that
> there is smoke or steam or anything like that but I haven't driven it all
> the way into the red! I'm no mechanic and only have a basic knowledge of
> repairs. I'd appreciate any help as to where I should start. My
> uninformed newbie guesses would lead me to look into a new radiator or
> something involving the transmission. I just ordered a printed Haynes
> repair manual and the Ford factory service manuals on CD hoping these may
> help. I bought this van with no warranty 'as is' so I'm stuck dealing with
> the problems myself and appreciate any pointers.
>
> Thanks
> Jay
>



The rumbling and heating are likley unrelated (rumbling may be to to
aerodynamics at certain speeds). Check thermostat and clutch fan
operation is so equipped and make sure the a/c raditor cores are not
plugged with bugs abd dirt. If that all checks out, you make have
deposit buildup internally in radiator restricting cooling.



-----------------
www.thesnoman.com
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Old 09-23-2005, 08:01   #3 (permalink)
putt@webtv.net
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Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

>I'm stuck dealing with the problems
> myself and appreciate any pointers.


This engine is just-about bullet proof, but it shouldn't run near the H
mark on the gauge. My 4.9 runs at 210 with the AC On and that shows
'just' past N on the factory gauge. I installed a real temp gauge long
ago.

Anyway, I'd look at the water-pump and/or a loose/bad drive belt. Could
be a faulty radiator cap. Possibly the previous owner didn't flush the
system, so the radiator may be somewhat restricted. The symptoms don't
read as a T-stat problem, unless some fool install one up-side
down....which I've seen. T-stats either work or they don't, and there
is no guessing about one not working....lol A new stat is cheap and
easy enough to replace.....as is a new radiator cap. The cap regulates
pressure within the cooling system. Correct pressure is everything to
the cooling system.

You might try flushing the system with a chemical flush. Also, Prestone
make a 'back-flush' kit. This kit enables the system to be
'back-flushed'.....which means the cooling system is flushed opposite
the normal way coolant flows....a good procedure. The kit cost about
$10 and is a simple installation.

Well, I hope something here helps....

Dave S(Texas)

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Old 09-23-2005, 10:01   #4 (permalink)
TheSnoMan
Guest
 
Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

putt@webtv.net wrote:
>>I'm stuck dealing with the problems
>>myself and appreciate any pointers.

>
>
> This engine is just-about bullet proof, but it shouldn't run near the H
> mark on the gauge. My 4.9 runs at 210 with the AC On and that shows
> 'just' past N on the factory gauge. I installed a real temp gauge long
> ago.
>
> Anyway, I'd look at the water-pump and/or a loose/bad drive belt. Could
> be a faulty radiator cap. Possibly the previous owner didn't flush the
> system, so the radiator may be somewhat restricted. The symptoms don't
> read as a T-stat problem, unless some fool install one up-side
> down....which I've seen. T-stats either work or they don't, and there
> is no guessing about one not working....lol A new stat is cheap and
> easy enough to replace.....as is a new radiator cap. The cap regulates
> pressure within the cooling system. Correct pressure is everything to
> the cooling system.
>
> You might try flushing the system with a chemical flush. Also, Prestone
> make a 'back-flush' kit. This kit enables the system to be
> 'back-flushed'.....which means the cooling system is flushed opposite
> the normal way coolant flows....a good procedure. The kit cost about
> $10 and is a simple installation.
>
> Well, I hope something here helps....
>
> Dave S(Texas)
>



Generally if it is plugged up that bad, no chemical flush over the
counter will work and a trip to the radiator shop to have it rodded out
is in order.

--

-----------------
www.thesnoman.com
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Old 09-25-2005, 19:09   #5 (permalink)
Ford Warrior
Guest
 
Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

Ford Warrior wrote:

> I just purchased a 1995 Ford E250 cargo van with 4.9L I6 and 3-speed auto.
> Everything seems to run fine and all fluid levels are up where they should
> be. No fluid is leaking. Tranny fluid is red, radiator fluid is green,
> oil is still somewhat clear. Prior to purchasing this vehicle a new
> temperature
> gauge was installed as the old one had stopped working. Fluid gauge
> indicates just below the 'high' level.
>
> The fan on the radiator is running fine. The vehicle drives fine with no
> problems until I get on the highway and get it over 55 mph. At this speed
> a deep low rumbling sound is felt/heard and the temperature gauge steadily
> increases and approaches the red after about 10 minutes of driving around
> 60-65. Strangely the low rumbling sound stops if I exceed around 65mph..
> I'm assuming this is where the tranny shifts into 3rd? Sometimes when
> accelerating rapidly I can actually see the temp gauge jumping up. After I
> get off the highway and drop down to usual street speed the temperature
> goes back into the normal middle level after a few minutes. I pop the hood
> and can feel the heat coming off the engine but It's not to the point that
> there is smoke or steam or anything like that but I haven't driven it all
> the way into the red! I'm no mechanic and only have a basic knowledge of
> repairs. I'd appreciate any help as to where I should start. My
> uninformed newbie guesses would lead me to look into a new radiator or
> something involving the transmission. I just ordered a printed Haynes
> repair manual and the Ford factory service manuals on CD hoping these may
> help. I bought this van with no warranty 'as is' so I'm stuck dealing
> with the problems myself and appreciate any pointers.
>
> Thanks
> Jay


An update is in order here... The lot/shop I bought the van from claimed
they were "sure" it was a bad thermostat.. so they took some more of my $$
to replace the thermostat and now the problem seems even worse. Now it
seems to run at normal speeds slightly hotter and STILL overheats on the
highway at speeds over 55mph. I just went to autozone and purchased a new
fan clutch but haven't installed it yet as I'm not even sure this is the
proper next step. It seems to me the speeds at which I'm driving on the
highway should be enough to cool the engine to some degree just as much as
the fan clutch would be doing.. or am i thinking wrong here? I'm just
thinking that if it were the fan clutch that were out of order then perhaps
the overheating would be happening while idling. The shop claims the
radiator is not clogged at all and is circulating and the water pump
appears to be fine. Does anyone have any further input before I blow $40
by trying to install this new fan clutch which may or may not fix the
problem?

Thank again for your help
Jay

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Old 09-25-2005, 20:01   #6 (permalink)
David M
Guest
 
Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

On Sun, 25 Sep 2005 19:35:24 -0500, Ford Warrior rearranged some electrons
to form:

> Ford Warrior wrote:
>
> An update is in order here... The lot/shop I bought the van from claimed
> they were "sure" it was a bad thermostat.. so they took some more of my $$
> to replace the thermostat and now the problem seems even worse. Now it
> seems to run at normal speeds slightly hotter and STILL overheats on the
> highway at speeds over 55mph. I just went to autozone and purchased a new
> fan clutch but haven't installed it yet as I'm not even sure this is the
> proper next step. It seems to me the speeds at which I'm driving on the
> highway should be enough to cool the engine to some degree just as much as
> the fan clutch would be doing.. or am i thinking wrong here? I'm just
> thinking that if it were the fan clutch that were out of order then perhaps
> the overheating would be happening while idling. The shop claims the
> radiator is not clogged at all and is circulating and the water pump
> appears to be fine. Does anyone have any further input before I blow $40
> by trying to install this new fan clutch which may or may not fix the
> problem?
>
> Thank again for your help
> Jay


I guess I would ask how the shop knows the radiator is OK... did they
clean it?

You might also make sure they didn't install the new t-stat backwards.

I doubt it's the fan clutch, or you would be seeing a problem at
idle too.

Are the belts OK? I suppose if the belt driving the water pump
was slipping, it could cause this problem.

--
David M (dmacchiarolo)
http://home.triad.rr.com/redsled
T/S 53
sled351 Linux 2.4.18-14 has been up 3 days 23:05

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Old 09-26-2005, 00:01   #7 (permalink)
ross via CarKB.com
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Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

General rule of thumb is overheating on the highway, start with the radiator,
overheats at idle, start at the fan clutch.


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx...truck/200509/1
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Old 09-26-2005, 07:01   #8 (permalink)
putt@webtv.net
Guest
 
Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

>Does anyone have any further input
> before I blow $40 by trying to install this
> new fan clutch.....


Did you try any of the checks I suggested? Like the drive belt? A new
Radiator cap?
The KISS principle........

DS

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Old 09-26-2005, 23:01   #9 (permalink)
Bill M
Guest
 
Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

Check your antifreeze concentration. If it's 100% antifreeze and zero
percent water, this could be the problem.

Bill M

"Ford Warrior" <fordwarrior@fordwarrior.com> wrote in message
news:jiHZe.9740$P7.3666@fe06.lga...
> Ford Warrior wrote:
>
>> I just purchased a 1995 Ford E250 cargo van with 4.9L I6 and 3-speed
>> auto.
>> Everything seems to run fine and all fluid levels are up where they
>> should
>> be. No fluid is leaking. Tranny fluid is red, radiator fluid is green,
>> oil is still somewhat clear. Prior to purchasing this vehicle a new
>> temperature
>> gauge was installed as the old one had stopped working. Fluid gauge
>> indicates just below the 'high' level.
>>
>> The fan on the radiator is running fine. The vehicle drives fine with no
>> problems until I get on the highway and get it over 55 mph. At this speed
>> a deep low rumbling sound is felt/heard and the temperature gauge
>> steadily
>> increases and approaches the red after about 10 minutes of driving around
>> 60-65. Strangely the low rumbling sound stops if I exceed around 65mph..
>> I'm assuming this is where the tranny shifts into 3rd? Sometimes when
>> accelerating rapidly I can actually see the temp gauge jumping up. After
>> I
>> get off the highway and drop down to usual street speed the temperature
>> goes back into the normal middle level after a few minutes. I pop the
>> hood
>> and can feel the heat coming off the engine but It's not to the point
>> that
>> there is smoke or steam or anything like that but I haven't driven it all
>> the way into the red! I'm no mechanic and only have a basic knowledge of
>> repairs. I'd appreciate any help as to where I should start. My
>> uninformed newbie guesses would lead me to look into a new radiator or
>> something involving the transmission. I just ordered a printed Haynes
>> repair manual and the Ford factory service manuals on CD hoping these may
>> help. I bought this van with no warranty 'as is' so I'm stuck dealing
>> with the problems myself and appreciate any pointers.
>>
>> Thanks
>> Jay

>
> An update is in order here... The lot/shop I bought the van from claimed
> they were "sure" it was a bad thermostat.. so they took some more of my $$
> to replace the thermostat and now the problem seems even worse. Now it
> seems to run at normal speeds slightly hotter and STILL overheats on the
> highway at speeds over 55mph. I just went to autozone and purchased a new
> fan clutch but haven't installed it yet as I'm not even sure this is the
> proper next step. It seems to me the speeds at which I'm driving on the
> highway should be enough to cool the engine to some degree just as much as
> the fan clutch would be doing.. or am i thinking wrong here? I'm just
> thinking that if it were the fan clutch that were out of order then
> perhaps
> the overheating would be happening while idling. The shop claims the
> radiator is not clogged at all and is circulating and the water pump
> appears to be fine. Does anyone have any further input before I blow $40
> by trying to install this new fan clutch which may or may not fix the
> problem?
>
> Thank again for your help
> Jay
>



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Old 09-27-2005, 00:01   #10 (permalink)
Ford Warrior
Guest
 
Posts: n/a
Re: Overheating and slight rumble when driving over 55mph

Ford Warrior wrote:

> Ford Warrior wrote:
>
>> I just purchased a 1995 Ford E250 cargo van with 4.9L I6 and 3-speed
>> auto. Everything seems to run fine and all fluid levels are up where they
>> should
>> be. No fluid is leaking. Tranny fluid is red, radiator fluid is green,
>> oil is still somewhat clear. Prior to purchasing this vehicle a new
>> temperature
>> gauge was installed as the old one had stopped working. Fluid gauge
>> indicates just below the 'high' level.
>>
>> The fan on the radiator is running fine. The vehicle drives fine with no
>> problems until I get on the highway and get it over 55 mph. At this speed
>> a deep low rumbling sound is felt/heard and the temperature gauge
>> steadily increases and approaches the red after about 10 minutes of
>> driving around
>> 60-65. Strangely the low rumbling sound stops if I exceed around 65mph..
>> I'm assuming this is where the tranny shifts into 3rd? Sometimes when
>> accelerating rapidly I can actually see the temp gauge jumping up. After
>> I get off the highway and drop down to usual street speed the temperature
>> goes back into the normal middle level after a few minutes. I pop the
>> hood and can feel the heat coming off the engine but It's not to the
>> point that there is smoke or steam or anything like that but I haven't
>> driven it all the way into the red! I'm no mechanic and only have a basic
>> knowledge of
>> repairs. I'd appreciate any help as to where I should start. My
>> uninformed newbie guesses would lead me to look into a new radiator or
>> something involving the transmission. I just ordered a printed Haynes
>> repair manual and the Ford factory service manuals on CD hoping these may
>> help. I bought this van with no warranty 'as is' so I'm stuck dealing
>> with the problems myself and appreciate any pointers.
>>
>> Thanks
>> Jay

>
> An update is in order here... The lot/shop I bought the van from claimed
> they were "sure" it was a bad thermostat.. so they took some more of my $$
> to replace the thermostat and now the problem seems even worse. Now it
> seems to run at normal speeds slightly hotter and STILL overheats on the
> highway at speeds over 55mph. I just went to autozone and purchased a new
> fan clutch but haven't installed it yet as I'm not even sure this is the
> proper next step. It seems to me the speeds at which I'm driving on the
> highway should be enough to cool the engine to some degree just as much as
> the fan clutch would be doing.. or am i thinking wrong here? I'm just
> thinking that if it were the fan clutch that were out of order then
> perhaps
> the overheating would be happening while idling. The shop claims the
> radiator is not clogged at all and is circulating and the water pump
> appears to be fine. Does anyone have any further input before I blow $40
> by trying to install this new fan clutch which may or may not fix the
> problem?
>
> Thank again for your help
> Jay


one more update.. I just noticed after getting off the highway today that
there is a tiny spot on the radiator itself near the top that is now
leaking a minute amount of fluid but only when driving at highway speeds.
Should I just go ahead and buy a new radiator at this point? I'm thinking
there may be a large portion of corroded/rusted walls in this radiator with
potential for pressure & fluid loss. Prior to this leak developing on the
radiator the mechanic still insisted the cause of my overheating on the
highway must be the fan clutch as it doesn't seem to go any faster when gas
is applied.
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