Question about Cars & Trucks
My heat indicator go up and down when I drive, never stay more than 30s at the max and then go down to normal, then after few minutes, go up again for about 30 seconds and go back to normal etc. Someone told me I may have air in the system.
I don't believe you have air in your system. It sounds like a sticking thermostat to me. But you better figure it out quick those neon motors don't like big temp changes. Your playing with cracking or warping the head. Any way here's what i know about burping.
When you drain & refill a cooling system air is often traped in places like the heater core. If so the coolant level will appear full before it really is. To burp you need to add coolant till full or just over. Adjust the heater control to MAX heat. This will let full force of water pump to push air out of heater core. Fan speed dose not matter. Next start the motor & let it idle. As it warms up the thermostat will begin to open and close. This is when you should see fluid level drop as trapped air is pushed from system ( add fluid as needed). If this is working right you should fell quite hot air coming from heat vents. If air doesn't seem hot enough adding RPM by pulsing gas pedal should do the trick. And that should do it.
Posted on Jul 15, 2013
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Posted on Jan 02, 2017
Most probably an air pocket in ur coolant system, just let it run without the cap on the coolant bowl until no bubbles come out.
As for ur oil light and buzzing, it's most probably the low oil level sensors tripping out, which is normal for a VW.
There are two oil sensors, one on the front of the engine near the distributor and one on the right hand side of motor when ur facing the motor. The are both the same size and have only 1 wire on em.
If i remember one has a white connector and one has a black connector. Costs about 20 bucks for the pair.
Good luck and get back to me if u have questions.
Posted on Sep 09, 2008
take the cap off of the radiator (whil engine is cold) start and run the vehicle. keep runnig 30mins after the vehicle is hot keeping notice of the rad fluid level.
keeping the cap off will prevent the pressure build up that woiuld keep the air in the system, keep adding water or antifreeze as the level goes down. this may take an hour or so.
also with the cap off, you will be able to see if your water pump is operating correctly. you will visibly be able to see movement in the rad when the pum is engaged.
Posted on May 26, 2009
You will need to change your thermostat as it is stuck and is not responding correctly to temperature changes. Have your mechanic change the thermo, do a flush of the system and all should be good again.
Posted on Oct 06, 2009
I had a similar problem and the mechanic diagnosed it as a problem with the ignition coil. So you might want to get that checked.
Posted on Nov 11, 2009
Tips for a great answer:
Oct 15, 2014 | 2002 Dodge Intrepid
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Apr 18, 2013 | 1998 Chevrolet Cavalier
Add a mixture of one-half water and one-half antifreeze to the radiator. Fill it right up to the top.
Fill the overflow/coolant reservoir with the same 50/50 mixture.
Leave the radiator cap off, turn the engine on and let it run until the radiator "burps": You will see the coolant level drop and may see or hear a large air bubble come to the top as the system burps.
Keep an eye on the temperature gauge throughout this process.
Refill the radiator to the top and coolant reservoir as needed.
Put the radiator cap back on.
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