Will a cracked overfill bottle cause my jeep to overheat.

bottle puse
if you google that we have 100years of that.
well back first internet called ARPnet
the answer are all the same
the engine is over heating.
then you google that word pair,engine overheats and see 20 reasons about 5 tools.to find it.(IR gun and leak down gauge)
the cooling systems on all cars have 1 purpose to remove all excess heat from the engine, to the main radiator.
It forms a coolant loop
all parts in said loop can fail. in many ways;
head gasket, pump, thermostat good. (checked off)
wow forgot a $5 new cap>? why?
bad huge radiator or full of bugs or AC condenser full of bugs
I use IR gun to all rad tubes)finned) and if one has NO temp drop end to end it is clogged up,. repeat al tubes, in seconds flat see 180f on once side and 150f or lower on the other and I say RAD IS GOOD.
tube test , 180f and drops to 150 or less is good
180f end to end is bad.(tube it is clogged)
my jeep here does 180f to 130f drop, 3.7 and my 3.8 liter both
does it overheat parked only (stops signs)
or never overheats driving fast, 50mph +??????

air in the loop not burped correcly!
loose fan belt to pump.
huge fans dead 1, 2, or even 3 on some cars
the service manual tells you at what temp each fan turns on, about 220f is it.
engine head or block cracked, sucking air or combustion gasses.
gee did you check the head for warp-age or just throw gasket on blind. no head can seal up if warped or cracked.

no year car or country.wow...
if you keep driving it , it will overheat.
then you warp heads.
get the car serviced pronto. (fast)
do not delay.
overheating causes cascade failures (expensive)

or the reverse, its already warped and the gasket leaks
and will get worse.

go to a shop and get a compression test.
(thing carefully how not to make it worse)

If your radiator coolant is boiling then do not drive as your car could/will overheat and cause some serious damage

The temperature gauge in the Mk4 Golf is'nt that accurate, it will usually stay in the middle until you've got a major problem, where the coolant is boiling and expanding so if it's just slightly overheating, the gauge could show as normal.

The problem could be caused by numerous things such as a leak/crack in the coolant system and isn't pressurized such as a faulty coolant bottle cap not sealing properly, could be a problem with the fans, or and issue with the temp sensor /thermostat can cause confusion. It's hard to diagnose without seeing. I would take it into a garage for further inspection.

when you topped the system up after the thermostat was changed. did you run the engine with the filler cap off and ran engine till all the air was out and keep topping up till all the air has come out and left to cool before toping up and putting the cap on ???

Fill the rad or overflow bottle right to the top and run the engine with no cap on,if you see a constant flow of bubbles your head gasket is leaking or you have a crack somewhere in the cooling system.

Hi and welcome to FixYa!

Few things why the car overheats, here are the following:

- Weak radiator blower motor
- Clogged radiator
- Cracked head or head gasket
- Faulty water pump (coolant will not circulate if it's faulty)
- Worn out radiator hoses
- Coolant reservoir overfill (coolant overflows)

You will need to have them replaced to resolve the problem. Hope this helps and thank you for using FixYa! Have a good one!

Hi,
Most likely it will cause overheating. The system uses pressure to raise the boiling of the coolant. Boiling coolant does not cool
well.

There is NO way water can get inside the muffler / exhaust pipe without evaporating, and causing a white smoke at the tailpipe. Additionally, in order to get inside, you would get major power and idling problems. I would look at the cooling circuits near the firewall ( cooling hoses to the internal heater, for example) because one of them must be dripping water externally onto the exhaust pipe or muffler. If the car never overheats, there is a possibility that you are simply overfilling the cooling water bottle. The full mark for accord bottles, is waaay down, it looks as if the bottle was empty. As soon as the engine heats up, it will send excess water overboard.

replace thermostat

Fill up the cooling system and start the jeep. Let the jeep get at operating temp with the radiator cap off. If the coolant level goes down, add more. Keep your eye on the radiator level and see if any bubbles appear while the car is running. DON'T keep your head over the filler neck, if you do see alot of bubbles or air bubbles, you could have a bad headgasket.