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Old 01-27-2008, 06:45 AM
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Back Flushing Heater Core

I was just wondering if that Prestone Kit, with the tee's that go on between the engine and heater core, is a good way of back flushing the cooling system?

I already have one installed and have used it before, but at the moment, I have no heat. My engine doesn't even get warm, so I'm thinking of swapping the thermostat.

Sometimes, I notice coolant on the passenger floorboard, does that mean there's a problem with my heater core? If so, what all is involved in replacing it?
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  #2  
Old 01-27-2008, 07:57 AM
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TurboBlew TurboBlew is offline
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yeap. And the heater core is a royal pain to replace.
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Old 01-27-2008, 12:19 PM
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Quote:
Originally Posted by TurboBlew View Post
yeap. And the heater core is a royal pain to replace.
Is that a 'yes' to the Prestone tee being a good way to backflush my cooling system or a 'yes' to my heater core needing to be replaced?
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Old 01-28-2008, 12:47 AM
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fuck it, Im going to convert those to HID and stick them in my heads, fogs, tails, double heads, and my butt so I make a halo while shitting

It would be like a holy shit, and maybe one around my penis for that illuminating experience a girl has hahahaahahahaah
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Last edited by TazRango; 08-18-2010 at 03:25 AM.
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Old 01-28-2008, 01:26 AM
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Quote:
Originally Posted by TazRango View Post
I think it was to both.. But the tee is only good at pushing the old coolant out of the system. In order to backflush the heater core you need to take both hoses off and alternate pressure into both ports. If there's coolant on the floor, then most likely the core is bad (and if you backflush it, you will most likely blow out any crap that is making it an intermittent leak and you will have a constant leak).

As far as replacing the core, it involves discharging the A/C and pulling the entire dash out, then you can pull the airbox. If you are going to do it, replace the evaporator core too, whether it needs it or not. It'll save you having to do the whole thing over when the evaporator blows.

According to Alldata, it's a 5.2 hour job by the dealer. However, that doesn't include the time to empty and then recharge the A/C system.
GROAN...
How long should it take if I do it? Approx. because everybody is different.

Also, how does that affect my engine not getting warm? I refuse to believe a clogged heater core will prevent my engine from getting warm. I mean, the heater core is like an enternal radiator for the cabin, so I would expect a clogged heater core to either make my engine warmer or get warm faster.
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  #6  
Old 01-28-2008, 05:17 PM
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"Ever had one of those days where you want to light someone's face on fire and try to put it out with a fork?"
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Originally Posted by Big_Texxan View Post
fuck it, Im going to convert those to HID and stick them in my heads, fogs, tails, double heads, and my butt so I make a halo while shitting

It would be like a holy shit, and maybe one around my penis for that illuminating experience a girl has hahahaahahahaah
Quote:
"Through this inscription I wish to enter my dying protest against what is called the Democratic party. I have watched it closely since the days of Jackson, and know that all the misfortunes of our nation has come to it though this so-called party. Therefore beware this party of TREASON." -Nathaniel Grigsby (1890)
Quote:
"How many times is Biden gonna say something stupid?" -Barack Obama (378 gaffes and counting!)

Last edited by TazRango; 08-18-2010 at 03:27 AM.
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  #7  
Old 01-28-2008, 06:10 PM
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UPDATE:

When I initially started this thread, I was in the process of swapping out the cheap 195 thermostat for a Duralast 180 thermostat that I replaced because I thought the lower temp thermo was responsible for my lack of heat, before I found it was due to low coolant because water pump was going bad.

While I had both thermos out, I decided to put them in some water and make sure they open when they should and are closed when they should. The 180 thermo didn't open til the water was past 180, I think 190 or 195. The 195 didn't open til well over 200, like 210. So I don't see how my engine wasn't getting warm, it definitely couldn't or shouldn't have been due to the thermo staying open. Under the impression that the heater core was toast, I put everything back together, using the 180 thermo. I mean why not, what's the worst that could happen, right?

So, I put the 180 thermo in, put coolant back in and start it up so the coolant can circulate and I can top the radiator off. After letting it run for a few min, I check the temp guage and the needle moved further then it had for a 10-20 min drive!!! So I turn the heat on and

VOLIA!!! I got heat!!! Well not take your clothes off heat, but I wont chatter and mess my teeth up for 10-15 miles.

I still think I may need to replace my heater core, however. And I may look into a temp sensor as well.

Quote:
Originally Posted by TazRango View Post
Your engine IS getting warm.. If the thermostat is stuck open, then it will take a LOT longer to get to operating temp.
How about never. The day after Christmas, I drove about 350 miles, from St. Louis, MO to Junction City, KS. Engine did not reach operating temps after driving almost 6.5 hours at 70mph. Same thing on the way back.
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Old 01-28-2008, 06:52 PM
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So.. was it the thermostat then?
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Old 01-28-2008, 11:15 PM
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Quote:
Originally Posted by Sour Diesel View Post
So.. was it the thermostat then?
It would seem so, but I still think I may wanna replace the heater core when it gets warmer.
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