Here is a video of me flushing out my heater core…here are the symptoms to make me do this: Heater had very little heat, even when the car was up to temper…
Here is a video of me flushing out my heater core…here are the symptoms to make me do this: Heater had very little heat, even when the car was up to temper…
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wow your lt1 runs with the needle at 3/4 of the gauge? mines usually right below the center mark when fully warm
76,000 wow nice i have 180,000 1995 lt1 it still runs great
I have the same car model ,but the car after when i changed water pump she taked long time to worm tell how to fic
Sounds like it might be in the grid…or the connectors to the grid…start there.
My rear defrost won’t work in my 91 caprice classic I changed the fuse didn’t help the light on the knob does come on. Any ideas where I should start ?
great job! I never thought about isolating the heater core to flush it separately!
For the heater core, you can do it when the car is completely cold. Otherwise, let temperature be your guide…aka not scolding hot…any other temp is fine, just make sure you release any system pressure first.
So how long shld I let car sit before flushing ?
thats best, just saying if you dont have any money and you just want a quick fix.
Yeah…but I’d rather rid the system of what’s in it vs. just moving it somewhere else.
If you just reverse the hoses it will run backwards and unplug it. I did that once and it worked like a charm.
Very well documented flushing of the heater core….
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Merrie-Merrie
I haven’t heard of air being an issue in the LT1, I didn’t do anything special besides re-attach the hoses. I think the positive flow from the water pump tends to displace any air that gets trap in there. The heater core is also relatively low, which might move air along.
Not really. The car is still using the same coolant, it hasn’t changed, I just ran water through the heater core and then cleaner to make sure there wasn’t any buildup holding up the works. The whole car is actually easier to do, but requires a much greater volume of material and time as you need to get the engine hot enough in each step to open the thermostat.
is this the same as a coolant flush? The dealer wants $140 and I doubt they’ll be this in depth…luckily they sent me a coupon to get a tranny fluid change for $110 instead of $220. Good video!
For an engine going on almost two decades, it sounds pretty good. I’m told that trapped air is the commonest cause of this but evidently you burped it before flushing. Good demo. I hate flushing cooling systems because of the huge weight of fluid that has to be trucked off to the recycler. Cheers.
I edited out the explanation. The 1994 LT1 runs a line from the expansion tank to the top of the radiator. Apparently this wasn’t need as it wasn’t on the 1995 model. My late 1994 lacks the radiator nipple but has the 1994 tank, so the factory plugged it with what you see.
Ben,why is the overflow hose at your expansion tank clamped off?
Well done !!