Question about 1999 Pontiac Sunfire

2 Answers

99 Sunfire Coolant keeps dumping

I started having a similar problem last week with the 99 2.4L Sunfire. My low coolant light would light up intermittently. I made sure the system was full to the proper mark. I went to pick my son up Thursday night from football practice, only a 2 mile drive, and everything seemed fine. I went to leave for work on Friday and noticed a puddle of anitfreeze under my car, so I filled the system again. I drove about 30 miles on Friday and all was fine. I drove around town on Saturday, about 10 miles and everything seemed fine, until I went to leave for work on Monday and noticed another puddle under my car, this time it was huge. I filled the system again, drove to work and everything seemed ok. I went to leave work and noticed a small puddle. I went home with no problems, but once again I came out this morning to another puddle. What I am confused about is that the car is not overheating, and not leaking or dumping antifreeze until after it is parked. Please HELP!!

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Pontiac Master
  • 6,982 Answers

You need to find the source of the leak. it hasn't overheated yet because you keep catching it and re-filling. From your description, it sounds a lot like a bad water pump seal (part of pump) but without physically looking you can't be sure of that. when the pump seal begins to fail, internal pressure while running often will drive the seal tighter against the shaft stopping the leak. as pressure drops as the engine cools, the seal relaxes and permits seepage.
With time, that will change and it will leak all the time.

Posted on Oct 07, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

When i topped off the antifreeze after my oil change i put too much in and there is a hose and when the coolant gets too hot it has to go out cause you to see a puddle on the drivers side, my brother in law is a mechanic he checked the water pump and the radiator..........

Posted on Apr 29, 2012

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Low coolant light keeps coming on but coolant looks full


look close at your expansion tank. you will find marks
max____
~~~~~~~~~~~~~~~~
min_____
after you drive for 5-10 min.the coolant expend and rise the level in the tank
fill the coolant to max on cold engine
DON'T MIX COOLANT
USE ONLY FACTORY RECOMMEND
pentofrost-nf.jpg
PENTOFROST SF (without silicates)
(Formerly LIFETIME ANTIFREEZE G12)
Size: 1.5 liters (1.59 quarts), Part# 8114107
Color: Pink & Clear
CLICK HERE FOR PENTOFROST SF SPEC SHEET
  • Audi (after 06/1996 up to 2005); Spec. TL 744 F

Mar 23, 2014 | 2005 Audi A8

2 Answers

2000 Pontiac Sunfire GT 2.4L Low coolant light on, even with coolant reservoir full, car is overheating.


I think the first thing I would do is take the thermostat out and run the engine without it.
If the engine stops running hot, try a 180 degree instead of the 195.
As for the low coolant light, can you unplug the sensor and make the light go off ?

Jul 28, 2012 | 2000 Pontiac Sunfire

1 Answer

The checj engine light on my 99 pontiac sunfire came on last week and stayed on when i drove only a few short distances. it sat for 4 days and was on again when i drove under 8 miles then finally turned...


first of all, was the water on the passenger side from the air conditioner or a leak (what color was the fluid?)-the cap has to be tight, otherwise it will not hold pressure, so that has to be checked before you set off again-push down as you turn the cap clockwise, and it will not hurt to have water in the system (it actually transfers heat better than antifreeze) but it has a much lower boiling point, so the cap has to be tight. Pay attention to the temperature gauge and do NOT overheat it-it is an aluminum engine and they do not tolerate excessive heat. Take your time, no AC (although the AC being on can keep a good cooling system more stable since the radiator fan is forced on when the AC is running, so you can, within reason, experiment)-no matter what, just don't let it run hot-not worth it.

May 31, 2011 | 1999 Pontiac Sunfire

1 Answer

On a 2002 Buick Century with 3.1 liter motor. "service engine soon" light remains lit. Last week it was the "low coolant" Light that stayed lit. Had a new coolant sensor installed and problem still...


No you need to have the vehicle scanned for the check engine light to see what the code is that has it on. Autozone will do this for free.

May 17, 2010 | 2002 Buick Century

1 Answer

2001 Pontiac Sunfire is dumping antifreeze out the overflow. Could it be something other than thermostat?


Common causes include: leak from engine, hoses, etc. causing overheat due to low coolant, electric fan not coming on, internally obstructed radiator, external obstruction to radiator (leaves paper. plastic bag on front of radiator of stuck between radiator and A/C condenser), bad thermostat and last, blown head gasket. Proper testing for any and all these conditions will give you the answer you are looking for. If the antifreeze is overflowing without any overheat, it can either be over-full, or in some cases, a head gasket can do this by filling the cooling system with exhaust and driving the coolant out.

Aug 15, 2009 | 2001 Pontiac Sunfire

2 Answers

I don't know what the symbol means on my 1999 Pontiac Sunfire


does it look like a radiator? Low coolant sensor, may be in the overflow tank. Check your coolant levels when cold.

Jul 19, 2009 | 1999 Pontiac Sunfire

2 Answers

Low coolant light is on with full radiator


Check the coolant top up reservoir. Low coolant sensor is usually in the overflow/reserve container.
Wash out and clean any dirt or corrosion from the sensor prong.
Refill to correct level with fresh coolant, then recheck alarm operation.

Jul 17, 2009 | 1997 Pontiac Sunfire

1 Answer

99 Deville coolant issues


do you have a cloud of white smoke out of the tail pipe?

Dec 23, 2008 | 1999 Cadillac DeVille

Not finding what you are looking for?
1999 Pontiac Sunfire Logo

389 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

78936 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...