my venture is backing antifreeze into the resivior and it is not cooling the engine. the low coolant light is always on. when you take off the radiator cap there is brown gunk. do i need to get it flushed? has anyone had problems with the radiator. oh yeah the heat blows cold air.
2007-02-13 06:36:03 · 5 answers · asked by Cherise 1 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
Your head gasket is more than likely blown, It or there is a small chance that its only the thermostat but more than likely the brown gunk is some oil residue from a leaking head gasket. Good luck hope this helps
2007-02-13 06:42:29 · answer #1 · answered by Dina B 3 · 1⤊ 1⤋
1st, there is nothing wrong with the "brown gunk" you have built up in your radiator. Talk to GM and they will tell you the same. The build up you see is a result of the Dexcool coolant mixing with air which creates that problem. GM has a tech. service bulletin out for that exact complaint, but it still could be due for a flush if the truck has 5 yrs or 100 k on it. I would have the coolant system pressured check for a leak, a very common problem this time of year especially is the water pump and the lower intake gaket. The intake gasket is so common that GM extended the warranty to 70 on certain 3.1 and 3.4 engines. The coolant loss will create an air pocket in your coolant system that will over heat the vehicle and cause no heat complaints for the heat also. Pay for an acurate diagnosis and save yourself money in the long run, good luck
2007-02-13 12:28:54 · answer #2 · answered by mrautomechanic 4 · 0⤊ 0⤋
The head gasket mentioned above is a possibility.
However two other things can cause this to occur.
1. A stuck thermostat. Replace thermostat.
2. A Bad radiator cap. The spring that is suppose to hold up to a certain amount of pressure is not holding and thus allowing the coolant to escape to the resevoir.
I'd replace the radiator cap first. It's the easiest and cost only about $10 and you can easily do it yourself.
If not, then I'd check to see if you've got oil and water mixing. If not go after the thermostat. The heat not blowing hot could mean your thermostat is stuck closed. This may result in a blown head gasket if it's not fixed immediatly.
2007-02-13 06:44:46 · answer #3 · answered by hsueh010 7 · 0⤊ 1⤋
If van fuel injected or TBI won't make any difference pumping pedal. You may have blocked injector or possible vac. leak. Also may have bad coolant sensor. May need to get computer scan to check sensor readings first. Sweet smell is usually coolant but could be residual. Get rad. pressure check to be sure. Also you may have bad cooling fan relay . Suggest you take to shop there are so many things it could be and needs hands on approach verses internet.
2016-05-24 05:54:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
your heater core is plugged . you can replace it or flush it with muratic acid, muratic acid flush will fix it, instead of replacing it.
2007-02-13 07:09:13 · answer #5 · answered by Mickirs 3 · 0⤊ 1⤋