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I’ve had heater cores go before and they did that but still made heat. Maybe it is leaking enough that you engine cooling system is getting low. You don’t want to overheat the engine.
[quote=”Brins4runner” post=118453]Hi, I have 96 Toyota runner that’s blowing steam inside and fogging up windshield .Do you know whats causing this and how to fix it? is it heater core maybe? heater blows cool air also. thanks for your help..[/quote] does Eric the car guy answer? i thought this is where we ask him service and repair questions.
Eric does answer here, so he should be along maybe later in the day. Meanwhile, check your coolant level, as barneyb mentioned above. Is there any overheating or signs of coolant dripping underneath the vehicle?
Safe money bet is the heater core. Makes a slime coating on the windshield. Feel the carpet at the firewall. It’s probably a bit sticky and damp if the gasket seals on the heater box are weak and leaky.
Eric’s a busy guy! But we have a lot of really talented people that love to help others!!
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[quote=”Brins4runner” post=118453]Hi, I have 96 Toyota runner thats blowing steam inside and fogging up windshield .Do you know whats causing this and how to fix it? is it heater core maybe? heater blows cool air also. thanks for your help..[/quote]Smells like anti-freeze inside your truck too right ?
Heater core corroded and starting to leak.
yep,no over heating though. so do i need a new heater core or can i fix this one? is it easy to fix or replace? thanks for your help..
Unless they’ve gone to aluminum it can be fixed at a radiator shop. However, since it is so much work to replace and with a used core you chance another leak, it is an almost universal practice to replace with new.
Eric has a video on here about uncloging the heater core. do you think i should try this first or just go get a new one? thanks again for your help.
Replacement.
The issue with yours is a leak from the sounds of it. So trying to unplug it wouldn’t have much of any effect on the leak.
Pick up a Haynes or Clintons guide for your car/truck and see what it entails. As a final check it wouldn’t hurt to peek at the connections from the heater hoses to the heater core fittings. (Kinda do not think you will find any issue, but doesn’t hurt to look)
I’d check rock auto for a replacement and then compare their cost with local auto parts houses. Used in this case might make more work then the possible savings..install a used one that leaks? And you’ll be doubling up on the labor to R&R it.
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