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External
Since: Mar 21, 2008
Posts: 1
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(Msg. 1) Posted: Fri Mar 21, 2008 1:58 pm
Post subject: engine temp over NOT  Add to elertz
Archived from groups: alt>autos>toyota>trucks (more info?)
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The situation: at idle, truck warms up normally, then after a fer
minutes the engine temp gauge moves slowly up into the red zone, then
suddenly drops back to normal, and stays there.
The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
clutch, replaced engine temp sensor, replaced thermostat. Coolant is
at normal level, no sign of loss.
Any ideas? |
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External
Since: Oct 22, 2007
Posts: 5
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(Msg. 2) Posted: Fri Mar 21, 2008 3:12 pm
Post subject: Re: engine temp over NOT Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Sounds like the thermost (the thing that blocks waterflow until the temp
gets up) is opening late.
It has a little hole in it to let water flow enough so that it gets to know
when the water is hot.
Is that hole plugged with a flake of something?
GC
"Geoff" <geoff.TakeThisOut@hughes.net> wrote in message
news:e622a952-b3ff-48d0-a203-db99bc7b2815@e39g2000hsf.googlegroups.com...
> The situation: at idle, truck warms up normally, then after a fer
> minutes the engine temp gauge moves slowly up into the red zone, then
> suddenly drops back to normal, and stays there.
>
> The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
>
> Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
> clutch, replaced engine temp sensor, replaced thermostat. Coolant is
> at normal level, no sign of loss.
>
> Any ideas? |
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External
Since: Oct 22, 2007
Posts: 5
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(Msg. 3) Posted: Fri Mar 21, 2008 3:16 pm
Post subject: Re: engine temp over NOT Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Also, make sure the TStat isn't in backwards.
GC
"Geoff" <geoff.DeleteThis@hughes.net> wrote in message
news:e622a952-b3ff-48d0-a203-db99bc7b2815@e39g2000hsf.googlegroups.com...
> The situation: at idle, truck warms up normally, then after a fer
> minutes the engine temp gauge moves slowly up into the red zone, then
> suddenly drops back to normal, and stays there.
>
> The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
>
> Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
> clutch, replaced engine temp sensor, replaced thermostat. Coolant is
> at normal level, no sign of loss.
>
> Any ideas? >> Stay informed about: engine temp over NOT |
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External
Since: Feb 25, 2007
Posts: 223
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(Msg. 4) Posted: Fri Mar 21, 2008 9:41 pm
Post subject: Re: engine temp over NOT Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Bad gauge?
On Fri, 21 Mar 2008 13:58:42 -0700 (PDT), Geoff <geoff.DeleteThis@hughes.net>
wrote:
>The situation: at idle, truck warms up normally, then after a fer
>minutes the engine temp gauge moves slowly up into the red zone, then
>suddenly drops back to normal, and stays there.
>
>The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
>
>Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
>clutch, replaced engine temp sensor, replaced thermostat. Coolant is
>at normal level, no sign of loss.
>
>Any ideas? >> Stay informed about: engine temp over NOT |
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External
Since: Mar 08, 2006
Posts: 286
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(Msg. 5) Posted: Fri Mar 21, 2008 10:51 pm
Post subject: Re: engine temp over NOT Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Chips" <chips1.RemoveThis@reliableins.nospam> wrote in message
news:zpWEj.3986$qT6.1402@nlpi070.nbdc.sbc.com...
> Sounds like the thermost (the thing that blocks waterflow until the temp
> gets up) is opening late.
>
> It has a little hole in it to let water flow enough so that it gets to know
> when the water is hot.
>
> Is that hole plugged with a flake of something?
>
> GC
That little hole is in the thermostat so that air can pass by, this prevents
an air bubble from forming around the thermostat. The water gets plenty hot
even without moving.
>
>
> "Geoff" <geoff.RemoveThis@hughes.net> wrote in message
> news:e622a952-b3ff-48d0-a203-db99bc7b2815@e39g2000hsf.googlegroups.com...
>> The situation: at idle, truck warms up normally, then after a fer
>> minutes the engine temp gauge moves slowly up into the red zone, then
>> suddenly drops back to normal, and stays there.
>>
>> The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
>>
>> Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
>> clutch, replaced engine temp sensor, replaced thermostat. Coolant is
>> at normal level, no sign of loss.
>>
>> Any ideas?
>
> >> Stay informed about: engine temp over NOT |
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External
Since: Mar 08, 2006
Posts: 286
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(Msg. 6) Posted: Fri Mar 21, 2008 10:51 pm
Post subject: Re: engine temp over NOT Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Geoff" <geoff.RemoveThis@hughes.net> wrote in message
news:e622a952-b3ff-48d0-a203-db99bc7b2815@e39g2000hsf.googlegroups.com...
> The situation: at idle, truck warms up normally, then after a fer
> minutes the engine temp gauge moves slowly up into the red zone, then
> suddenly drops back to normal, and stays there.
>
> The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
>
> Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
> clutch, replaced engine temp sensor, replaced thermostat. Coolant is
> at normal level, no sign of loss.
>
> Any ideas?
Sounds like either a bad sending unit or thermostat. You mentioned that you
replaced the "engine temp sensor". Being fuel injected, that engine has a
coolant temp sensor for the ECM and a temperature gauge sending unit that
operates the gauge. Are you sure you replaced the right one ? Have you checked
the coolant temp with a thermometer to see if is actually getting that hot ? >> Stay informed about: engine temp over NOT |
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External
Since: Mar 22, 2008
Posts: 5
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(Msg. 7) Posted: Sat Mar 22, 2008 9:12 pm
Post subject: Re: engine temp over NOT Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Geoff" <geoff DeleteThis @hughes.net> wrote in message
news:e622a952-b3ff-48d0-a203-db99bc7b2815@e39g2000hsf.googlegroups.com...
> The situation: at idle, truck warms up normally, then after a fer
> minutes the engine temp gauge moves slowly up into the red zone, then
> suddenly drops back to normal, and stays there.
>
> The truck: 1985 longbed, 200K miles, 22R-E (fuel injected) engine.
>
> Maintenance so far. Cleaned radiator, replaced hoses, replaced fan
> clutch, replaced engine temp sensor, replaced thermostat. Coolant is
> at normal level, no sign of loss.
>
> Any ideas?
Are your heater vents wide open during this? It happen to me, but I was
told it was normal. I had just finish rebuilding the timing assembly and
head gasket. Try to make sure you have no bubbles in the system. >> Stay informed about: engine temp over NOT |
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