Last post on Dec 04, 2012 at 5:37 PM
You are in the Toyota Avalon
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Toyota Avalon, Engine, Sedan
#18 of 30 Re: 1995 Toyota Avalon XLS keeps losing water. [holmandouglas]
by MrShift@Edmunds HOST
Jan 15, 2010 (7:43 am)
If it were the heater core and you were losing THAT much coolant, the interior of the car would have a horrendous stink to it.
The only sure way to get at this is have the shop pressurize the cooling system with a hand pump(or buy the tool yourself). The best way would be to pressurize it and then lift the car and see what's dripping.
If you see no external leaks (but you say you do), then you'd have to suspect a head gasket. Hopefully not. But the rough running is a troublesome sign. Hopefully not related to coolant loss.
#19 of 30 Re: car rug sopping wet with coolant.Huge repairs [betrayed]
Jan 17, 2010 (10:57 am)
"... causing the frost plugs to pop out..."
IMMHO that just does NOT happen absent an actual coolant freezing event..!
Have you checked with the previous owner on that being a possibility sometime during their ownership..??
".. causing a leak in the heater core.."
If the engine coolant got HOT enough to do all this damage then the engine life will be foreshortened significantly. I'm betting the previous owner allowed the coolant freeze level to get too low and the coolant froze. Makeshift repairs to the freeze plugs and a can or two of Barrs stop leak and the car was good to go for another...what, 13,000 miles..??
Even if, like you say, the thermostat stuck closed the radiator cap pressure relief arrangement would not allow enough coolant pressure to build up in the system to force the freeze plugs out, the water heater core...yes, maybe.
#20 of 30 Re: "As long as we're in there, we should also..." [dresbach]
Jan 17, 2010 (11:07 am)
A few weeks ago my daughter allowed Jiffy Lube, ("with this many miles it needs to be") to drain and flush her car's coolant. Within days the water pump developed a serious leak and had to be replaced.
No coolant system should subjected to more than 12-15 PSI of pressure.
#21 of 30 Re: 1995 Toyota Avalon XLS keeps losing water. [Mr_Shiftright]
Jan 17, 2010 (11:12 am)
Maybe I'm getting too old and my sense of smell is failing but it seems to me that these newer coolants do not smell nearly as strong as those of yesteryear.
Ethylene Glycol no longer being used..?
#22 of 30 Re: 1995 Toyota Avalon XLS keeps losing water. [wwest]
by MrShift@Edmunds HOST
Jan 17, 2010 (11:28 am)
You may be right but even so, if you had a substantial heater core leak your windshield would be full of condensation as soon as you hit the defroster. In that case the coolant would be pretty much in your face.
#23 of 30 Re: 1995 Toyota Avalon XLS keeps losing water. [wwest]
Jan 17, 2010 (5:52 pm)
There is another antifreeze, propylene glycol, that is not as dangerous to people and pets. It works to 50 below also if mixed properly. No ideas on whether it is used in all cars, or Avalons, or if it smells better or not at all.
#24 of 30 Re: 1995 Toyota Avalon XLS keeps losing water. [Mr_Shiftright]
Jan 17, 2010 (7:35 pm)
"..windshield would be full of condensation.."
That only requires past use, yesterday, of the A/C for dehumidifcation, no heater leak necessary.
#25 of 30 Re: car rug sopping wet with coolant.Huge repairs [wwest]
Oct 20, 2010 (9:03 am)
I had a Toyota Avalon 97 XLS. It overheated at 205
K miles. The radiator cracked. I had it replaced at a local mechanic shop. It was 100+ miles away from home. After the new radiator and coolant it still over heated in about 8 highway miles. He told me it might be a headgasket. I thought possible but wasn't sure. It needed a new Timing belt on my PM schedule so I drove it to our cabin (20 miles and 3 stops to cool)and changed the timing belt. I found the water pump was broken. The shaft let the timing belt turn but not the impeller. I changed the waterpump (I had it apart for the timing belt at this point.) The pump was $50. When I put it back together it worked great. My son drove it to 275K with no other trouble. It got totalled in a rear end accident but it was still running good and giving 25mpg and no oil added between changes. It was a great car.
#26 of 30 '98 Avalon XLS Heating
Oct 24, 2010 (9:03 am)
My son's 98 XLS with 145,000+ miles has a new home---Portland, Oregon--quite a change from Phoenix, Arizona. AC works great! Heater does not appear to work at all.
Turning the heat/temperature dial from low to high and back causes the fan and control panel lights to change and there's the sound of a door flap opening and closing BUT the car and air coming in to it does not warm up.
It was serviced and checked out before he left but no one thought to check out the heater---it was 104 or so when he left. During the 1,500+ mile trip, the temperature gauge was right in the middle and no coolant was added. We have generally followed the recommended maintenance schedule since purchasing the car used with about 28,000 miles on it several years ago.
Any thoughts, ideas, experiences, suggestions, remedies or fixes anyone can suggest from personal experience--even what NOT to do--will be appreciated.
Limited income, new job, start up housing expenses are all in his immediate future so knowing what he can do to get this fixed and not get too badly screwed in the process is important. A new (or newer) car right now is not an option but spending the coming winter freezing in his car because the fix is too expensive does open the door to the need to consider options.
Thanks to all who can provide information!
#27 of 30 Re: '98 Avalon XLS Heating [azadmin]
Oct 24, 2010 (2:29 pm)
I would bet that the valve that shifts hot engine water to the heater core is simply cruded up and stuck in the off position. I haven't had enough experience with Toyotas to know exactly where this valve is in the "water in" heater hose, but a check of web sites about "flushing the heater core on an Avalon" might reveal the location. The recommendation for most cars a few years ago was to move all controls to heat a couple of times during the summer (all the time in Arizona?) to keep the valve and heater core flushed out.
Any competent radiator shop that can perform flushing of heater cores should be able to fix the problem. I would not let a Toyota service dept. do this because of what they would charge!