Question about 2004 Chevrolet Aveo

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I have a pinhole in my heater hose causing me to lose coolant, my mechanic has done a temporary fix as the hoses are on back order, i am losing coolant again, so i think the temp fix has given way, can i put water in the resevoir in the meantime until the part gets in?

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  • Chevrolet Master
  • 5,332 Answers

Yes you can but make sure the radiator is also full. The radiator uses suction to pull fluid back into it from the overflow reservoir. If there is a leak there may not be enough suction available to **** fluid back into the radiator as the engine cools.

Posted on Mar 19, 2011

  • 3 more comments 
  • trishyfer Mar 19, 2011

    thanks - is that what will cause the "sizzling" sound i hear when the engine is turned off? theres coolant everywhere on the engine, its like it has blown or something.. i hope this part gets in soon!

  • Jeremy W.
    Jeremy W. Mar 19, 2011

    If its leaking that bad you may want to reconsider driving the vehicle. It is vital that the engine stays cools during operation. If you run out of coolant and overheat the engine you could severely damage the engine itself. IMO, its not worth ruining a couple thousand dollar motor for a couple hundred dollar part.

    A slow leak that you can adequately keep up with would be no problem over the course of a couple of weeks.

  • trishyfer Mar 19, 2011

    thanks - thats why i asked if i can keep it full of water instead of coolant until the hoses come in from the dealer and i can have them replaced - its costly to keep buying coolant in the interim

  • Jeremy W.
    Jeremy W. Mar 19, 2011

    Water is fine unless you live in a cold weather environment where the temps dip below freezing. Once the hoses are replaced you'll want to have the cooling system flushed in order to regain the proper coolant to water ratio.

  • Joseph Hoffmann Jun 25, 2014

    Hi, Do keep the coolant up at all costs till the parts arrive.. You can damage the engine if you don't. (Over heating)

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1 Answer

Water Leak


Most likely problem is a leaking heater core. This is what usually causes water leaking into the passenger compartment. Quick fix on many vehicles is to get a hose adapter the same internal diameter as the heater hoses, remove the heater hoses from the firewall connection to the heater core, and install the adapter, making a bypass loop. This will allow operation of the vehicle without coolant loss until you can replace the heater core. Of course you will have no heat in the passenger compartment during this time.

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A heater core is nothing more than a small radiator with coolant passing through it. Like a radiator, heat in the coolant is dispersed to the surrounding air -inside the heater case. If it isn't leaking coolant, you will only have to fix it when you can't stand being without a heater. Would it help not using it? Only if using it causes it to leak.
What exactly is broken? If it is losing coolant, a temporary remedy is to splice the two heater hoses together. You can pull them off at the firewall, the inlet and outlet hoses, buy a plastic coupling piece that fits snugly into the hoses, and clamp them tight with hose clamps. You will have no heater, but you won't have a core that is leaking coolant into the heater case.
If the heater core is good, your problem might be the various doors in the case not being opened properly. The vacuum controlled actuators for the doors needs checked.

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Short hose leaking coolant/water in engine at firewall


The only coolant hoses i know of that would be anywhere near there would be ran to your heater core. Try looking for a place to reconnect the hose to. The heater uses your coolant to heat your vehicle & it sounds like the hose came off.

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Losing a lot of coolant. I don't see a leak. I started to drain the system and it smells burnt to s**t. What might my problem and possible solutions be?


see this causes and fix it. God bless you
Water pump -- A bad shaft seal will allow coolant to dribble out of the vent hole just under the water pump pulley shaft. If the water pump is a two-piece unit with a backing plate, the gasket between the housing and back cover may be leaking. The gasket or o-ring that seals the pump to the engine front cover on cover-mounted water pumps can also leak coolant. Look for stains, discoloration or liquid coolant on the outside of the water pump or engine.
Radiator -- Radiators can develop leaks around upper or loser hose connections as a result of vibration. The seams where the core is mated to the end tanks is another place where leaks frequently develop, especially on aluminum radiators with plastic end tanks. On copper/brass radiators, leaks typically occur where the cooling tubes in the core are connected or soldered to the core headers. The core itself is also vulnerable to stone damage. Internal corrosion caused by old coolant that has never been changed can also eat through the metal in the radiator, causing it to leak.
Most cooling systems today are designed to operate at 8 to 14 psi. If the radiator can't hold pressure, your engine will overheat and lose coolant.
Hoses -- Cracks, pinholes or splits in a radiator hose or heater hose will leak coolant. A hose leak will usually send a stream of hot coolant spraying out of the hose. A corroded hose connection or a loose or damaged hose clamp may also allow coolant to leak from the end of a hose. Sometimes the leak may only occur once the hose gets hot and the pinhole or crack opens up.

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2 Answers

Leaking on the passenger side, next to centre console. Dropping water level in so that it needs refilling almost daily 0.5 litre+. How do you fix it or can get a quote.


your heater core is leaking, need to replace it or u can put a hose connector to by-pass heater, this is done for temporary repair only. under hood look for two coolant hoses that go into firewall of veh. and install a hose connector that is same outside diameter of the inside of hoses & install two clamps to keep pressure from coming out.

Jan 15, 2011 | 1998 Subaru Legacy

1 Answer

Leaking coolant from rear heater core. is that a serious problem or can i simply replace the hear core?


It could be caused by the following :
Cracked core
Loose clamp.
Cracked hose
What could happen is that the crack opens and spills all your engine coolant inside the vehicle or lose it bit by bit causing a low coolant level with subsequent possible overheating. A crack on the core could rupture under pressure as could a hose.
A quick and cheap fix is to get a bottle of Stop-leak into the cooling system and drive it around for about 15 minutes. If the crack is small enough it will seal up especially if it's on the core itself. This is a temporary fix. That said, I have a 1968 Renault that's been driving like that for the past 2 years because I cannot find a replacement core and I'm not about to spend silly money on getting one custom built. However, considering the age and value of your vehicle I'd recommend replacing the faulty core/hose. It's up to your budget (and availability of spares)

Nov 15, 2010 | 2001 Dodge Durango

1 Answer

Is it okay to by-pass just ONE heater hose on my 1994 camaro Z28. The hose broke right at the flow fitting.


No - you must bypass both hoses by joining them together to keep the system closed. If, for example, you have 5/8 inch heater hoses, you can buy an adapter that will fit into both sides of the heater hose to bypass the heater core. It's easiest to pull both hoses off the firewall and then put the adapter there, making sure to tighten the clamps so you don't lose coolant and overheat your vehicle.. I'm not too sure where the break is by your description, but you have to make sure there are no unconnected hoses or you will lose all of your coolant
Hope this helps!

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1 Answer

Had tune up, now no heat


Sounds like there is air in the system and needs to be bled. I would go back to him and tell him there is no heat. He caused it, he should fix it.

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