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Next: 2002 Sonata Aftermarket Struts and Wheels
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External
Since: Jun 27, 2003
Posts: 4
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(Msg. 1) Posted: Sat Aug 16, 2003 6:38 am
Post subject: 1993 GS300 Overheating
Archived from groups: alt>autos>lexus (more info?)
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My GS300 is over heating when driving above 75 MPH but when in a stop
like in traffic light it cools down and never overheats so I recently
performed the following without any improvement:
1-Cleaned the radiator, added coolant, and replaced the thermostat.
2-Checked both electric fans and replaced the fan clutch.
3-Checked the engine oil for a probable head gasket problem and found
it clean and clear.
What else can I do? Any idea why overheating occurs when driving fast?
And cools down when in a stop? |
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External
Since: Jan 15, 2004
Posts: 41
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(Msg. 2) Posted: Sat Aug 16, 2003 9:41 pm
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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You've replaced so many things, I'd go with the process of elimination and
suspect water pump. It might be moving enough water at low engine speeds
that, with the help of the aux cooling fan, it is able to cool, but at high
engine speeds where the aux fan doesn't help, it needs a high flow rate and
it simply isn't moving enough water.
How many miles are on the car? I believe at 90K you're supposed to replace
the timing belt and typically the water pump is done at this time too. If
the pump is original, it's probably overdue.
- Mark |
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External
Since: Jul 17, 2003
Posts: 6
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(Msg. 3) Posted: Sat Aug 16, 2003 9:41 pm
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"markjen" wrote in message ...
> You've replaced so many things, I'd go with the process of elimination and
> suspect water pump. It might be moving enough water at low engine speeds
> that, with the help of the aux cooling fan, it is able to cool, but at high
> engine speeds where the aux fan doesn't help, it needs a high flow rate and
> it simply isn't moving enough water.
>
> How many miles are on the car? I believe at 90K you're supposed to replace
> the timing belt and typically the water pump is done at this time too. If
> the pump is original, it's probably overdue.
>
> - Mark
My car has around 60,000 Mile. The water pump looks ok, no leaks also
I saw its performance through the return hose, not bad, but at high
engine speed who knows! Can a water pump be bad and not leaky?
e-mail me at morpheus.TakeThisOut@qualitynet.net >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Aug 10, 2003
Posts: 4
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(Msg. 4) Posted: Sat Aug 16, 2003 9:46 pm
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Like Mark said...replace everything!!!
On Sat, 16 Aug 2003 20:41:03 GMT, "markjen"
wrote:
>You've replaced so many things, I'd go with the process of elimination and
>suspect water pump. It might be moving enough water at low engine speeds
>that, with the help of the aux cooling fan, it is able to cool, but at high
>engine speeds where the aux fan doesn't help, it needs a high flow rate and
>it simply isn't moving enough water.
>
>How many miles are on the car? I believe at 90K you're supposed to replace
>the timing belt and typically the water pump is done at this time too. If
>the pump is original, it's probably overdue.
>
>- Mark
> >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Aug 11, 2003
Posts: 4
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(Msg. 5) Posted: Sat Aug 16, 2003 11:33 pm
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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how much does a water pump usually cost to replace for the GS300? what
about the ES300?
"nGT" wrote in message
> Like Mark said...replace everything!!!
>
>
>
>
> On Sat, 16 Aug 2003 20:41:03 GMT, "markjen"
>
> >You've replaced so many things, I'd go with the process of elimination
and
> >suspect water pump. It might be moving enough water at low engine speeds
> >that, with the help of the aux cooling fan, it is able to cool, but at
high
> >engine speeds where the aux fan doesn't help, it needs a high flow rate
and
> >it simply isn't moving enough water.
> >
> >How many miles are on the car? I believe at 90K you're supposed to
replace
> >the timing belt and typically the water pump is done at this time too.
If
> >the pump is original, it's probably overdue.
> >
> >- Mark
> >
> >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Jul 10, 2003
Posts: 7
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(Msg. 6) Posted: Sun Aug 17, 2003 1:40 am
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Also replace the upper and lower radiator hoses. On all cars these get soft
over time (like 10 years) and restrict flow at high pump speeds.
"markjen" wrote in message
> You've replaced so many things, I'd go with the process of elimination and
> suspect water pump. It might be moving enough water at low engine speeds
> that, with the help of the aux cooling fan, it is able to cool, but at
high
> engine speeds where the aux fan doesn't help, it needs a high flow rate
and
> it simply isn't moving enough water.
>
> How many miles are on the car? I believe at 90K you're supposed to
replace
> the timing belt and typically the water pump is done at this time too. If
> the pump is original, it's probably overdue.
>
> - Mark
>
>
> >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Jan 15, 2004
Posts: 41
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(Msg. 7) Posted: Sun Aug 17, 2003 6:25 am
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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> Can a water pump be bad and not leaky?
Typically they leak when they go, but after ten years, who knows? For
example, you may have a impeller cracked or broken which could be causing a
restriction. It wouldn't be my first thing to replace, but you've already
done about everything else.
- Mark >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Aug 18, 2003
Posts: 2
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(Msg. 8) Posted: Mon Aug 18, 2003 8:45 pm
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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When the motor is cold, remove the rear main oxygen sensor. Does it have
coolant residue on it? If it does, it's head gasket time. Frank
"Mar1" wrote in message
> My GS300 is over heating when driving above 75 MPH but when in a stop
> like in traffic light it cools down and never overheats so I recently
> performed the following without any improvement:
>
> 1-Cleaned the radiator, added coolant, and replaced the thermostat.
> 2-Checked both electric fans and replaced the fan clutch.
> 3-Checked the engine oil for a probable head gasket problem and found
> it clean and clear.
>
> What else can I do? Any idea why overheating occurs when driving fast?
> And cools down when in a stop? >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Jun 27, 2003
Posts: 4
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(Msg. 9) Posted: Sun Aug 24, 2003 2:43 am
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Stuck in Central Florida" wrote in message ...
> Also replace the upper and lower radiator hoses. On all cars these get soft
> over time (like 10 years) and restrict flow at high pump speeds.
I took it to Lexus dealer and, they repaired it, they said it was one
of the bypass hoses which was chocked, so now I knew that the car has
more than the upper and lower hoses for coolant. Temperature gauge is
now back to normal (less than 1/3), thanks guys for your contribution. >> Stay informed about: 1993 GS300 Overheating |
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External
Since: Jul 10, 2003
Posts: 7
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(Msg. 10) Posted: Sun Aug 24, 2003 1:23 pm
Post subject: Re: 1993 GS300 Overheating [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Glad to hear it is fixed. Be happy that the bypass hose did not break on
you.
"Mar1" wrote in message
...
> > Also replace the upper and lower radiator hoses. On all cars these get
soft
> > over time (like 10 years) and restrict flow at high pump speeds.
>
> I took it to Lexus dealer and, they repaired it, they said it was one
> of the bypass hoses which was chocked, so now I knew that the car has
> more than the upper and lower hoses for coolant. Temperature gauge is
> now back to normal (less than 1/3), thanks guys for your contribution.
> >> Stay informed about: 1993 GS300 Overheating |
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