On Monday (04/21) had a shop drain the antifreeze and put some cleaner in and i drove car for about 3 hrs. Had crude in there. He drained the cleaner and put water in to help clean. Then antifreeze. Had heat and then none so have to get that looked at. Siad its cleaner in the radiator wished he showed me. Had 4 bottles of premix and used 2. Car is a 2004 buick park ave with a 3.8. Also had a new t stat and the gauge is a little higher and i can push a button and see the actual temp and its higher also. Now about 192 or so and before 181 or so
Flushed antifreeze
- Thread starter moparguy
- Start date
Most likely the cleaner dislodged a lot of crud, which in turn traveled through the cooling system, and lodged in the heater core. Try reverse flushing just the heater core.
Don't subject your cooling system to full water pressure at the hose spigot. (55 to 75 PSI). That can and will generate leaks in plastic and Aluminum heater cores. Most cooling systems are designed to operate from 12 to 16 pounds max pressure.
Propflux01
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I had an older Ford years ago that had a neglected cooling system. It was sold to me as "heater sometimes works". Ended up pulling the hoses off the heater core and back flushing it in order to clear it up.
I'm thinking your old thermostat was stuck partially open, that's why IT read a lower temp. And you may still have air trapped in the system. Your heater core may be partially blocked with crud. But before I'd go tearing the dash apart, keep an extra bottle of anti-freeze in the car and drive it around a while to be sure it isn't air bound.,,
Most car thermostats that I am familiar with are designed to run about 190 to 195F. Maybe your Buick is different. IDK. I would find that out first before you start to think you have a problem, which may not exist. Maybe they put in a 192 thermostat? Which would be a perfect and simple explanation to your inquiry.. Also when flushing with city water, you need to make sure it is all removed before you fill it up. City water has electrolytes that will accelerate corrosion. Yes to bilt465, use lower pressure than standard house water pressure. Ask me how I know. Being Somewhat sarcastic for comic relief.
i used one of these on my van after i used the rislone flush stuff when i did my rad. was trying to get that stopleak garbage out and it seemed to work based on all the junk that came flowing out of the top of the rad. I'm sure if i didn't have a massive leak over winter (which meant i was replacing a gallon pretty much weekly) the coolant would still be green
