Question about 2004 Pontiac Grand Prix

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When i stop are in slow traffic it overheats when i am moving itsa ok

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Fan is not working or low on antifreeze or thermostat is sticking.

Posted on Dec 31, 2010

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My 1991 nissan terrano overheats going up hill. I have replaced radiator. thermostat and water pump. Any suggestions welcome


if it has a viscous fan hub( fan clutch ) check it for correct operation
what you describe indicates that the fan is not travelling as fast as it should to be pulling air through the radiator
other indications are temp rising at stop lights , temp rising in slow moving traffic or in your case loaded ( going up hill)with higher engine rpm

Nov 12, 2016 | Nissan Cars & Trucks

2 Answers

I have removed the thermostart of my grand cherokee jeep 1996,i still experience temperature rising while i am in hold up or traffic but reduces as soon as i accelerate.


the thermostat was not the problem but the viscous fan hub ( fan clutch) is
while it is spinning , there is no drive action when idling ( as at lights , slow traffic , hills in low gear etc) and so it is not pulling air through the radiator when needed
your statement that the temp reduces as soon as you start moving means that with forward movement the air is flowing through the radiator and cooling the coolant

Jun 20, 2016 | Jeep Cars & Trucks

1 Answer

My engine overheat when A/C is running on a slow moving traffic or on parking.


I would check and see how much air is actually moving thru the radiator. The fan may not be running fast enough or you may have debris blocking the air flow. Also make sure the system is full of coolant and no air pockets.

Nov 03, 2015 | 1995 Jeep Grand Cherokee

1 Answer

Check engine comes in when engine starts to overheat, which it does in slow traffic. Radiator, fans, water pump are OK.


Did you check/replace the thermostat? Another possible cause may be hair line cracks in the head(s).

May 10, 2014 | 2006 Mitsubishi Lancer

2 Answers

Overheating problem, what is the most probable cause?


You need to stop using it immediately before you
cause some damage or more than you may already have
That is just common sense. It should not overheat or
be any different than it was in the past without problem

The car has to be checked over/diagnosed,tested,etc for
various issues to resolve

Borrow or Rent a car until resolved

No way to guess at the problem

You should have some type of codes avail even
if the check light isn't on,you need professional help
to get a start on resolving

The timing belt maybe worn & jumped or the head gasket
bad.

Over heating isn't usually a cheap repair unless the thermostat
sticks partially closed

The RPM moves around the car is 11 years old,so it may just
need a though going over

Timing Belt,O2 Sensors,Exhaust Converter,Spark Plugs
and such

If you depend on a repair shop to do things & don't
have the knowledge to request work done throughout
the year,then you run into a lack of proactive preventative
maintenance situation. Most things are simple looking
back, once resolved

Sep 06, 2012 | 2002 Chevrolet Prizm

1 Answer

My car keeps over heating I have replaced the thermostat and radiator hoses what else could there be that keeps it over heating?


If it overheats on the freeway or constantly moving over 35 mph, it will more likley be the radiator blocked upped.

If it overheats only in slow moving traffic, it will likley be a thermo fan issue.

If it overheats all the time and is losing coolant it could be a blown head gasket.

Jul 15, 2011 | 1991 Toyota Camry

1 Answer

I have an 04 Overland with 4.7L HO engine. When the heat is on it blows cold air until the engine temprature reaches about 200 then it will blow hot as long as I'm accelerating or moving. If I idle or...


You're probably low on coolant. The waterpump is pushing a lot of coolant through the engine at higher engine speeds therefore when the engine slows down- less coolant! Check reservoir and add coolant and probably will have to have the system bled.

Feb 05, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

2000 Ford focus se wagon overheat


you may have a stuck thermostat,if all fans are working then just flush out radiator and replace
thermostat.check for any coolant leaks and check coolant level after few days

Jun 14, 2009 | 2000 Ford Focus

2 Answers

Overheats when standing in slow traffic


Sounds like your theorem stat might need changed

Dec 22, 2008 | 2002 Mitsubishi Montero Sport

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