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How do you bleed a radiator?
03-23-2005, 10:23 PM
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How do you bleed a radiator?
Alright my fan isnt turning on and I've done a little research. I found out that when you flush out your radiator, air pockets gets in there, causing your fan not to turn on or whatever, and you would need to bleed it. Also, my lower radiator hose isnt gettin hot when my top radiator hose is hot. Anyway, I have a 98 Civic EX with a d16y8. I flushed out the radiator a few times before and just refilled my radiator. I didnt know how to bleed it. Now my radiator fan isnt turning on. Could anyone tell me how to bleed my coolant system? Thanks in advance.
03-23-2005, 10:32 PM
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there should be a bleeder screw near the radiator. I believe it's like 1/3 of the wway to the block. Looks just like a brake bleeder screw. I thinka ll you do is loosen it and wait for the bubbles to stop.
03-23-2005, 10:34 PM
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Re: How do you bleed a radiator? (akad3mikz)
1. There should be a bleeder valve (exactly like a brake bleeder valve) on upper hose inlet i believe (i have a teg LS engine, not too much a d-series guy).
2. get a clear hose to fit over the bleeder valve nipple and get a proper sized wrence and after the car warms up, crack the bleeder valve open and have a container to catch the coolant that comes out. Most of it will start coming out when the thermastat opens. When you stop getting air bubbles from the bleeder valve, snug it back down and make sure your temperature is where it should be. Also, your radiator fan doesnt need to come on unless your engine reaches a certain temperature. just because the engine is up to operating temperature and the thermastat is open doesnt mean that the radiator fan should be on. It's only going to come on if the engine reaches a certain temperature which is determined upon the coolant temperature sensor reacing a certain temperature. My fan hardly ever kicks on in my EG Hatch and it has a stock radiator with a Integra LS engine. So... if you want to see if you can get the fan to come on, after you bleed the system, rev the engine up to 2500 - 3000 rpm and hold it to see if the fan kicks on (shouldnt take more than 5 minutes)
2. get a clear hose to fit over the bleeder valve nipple and get a proper sized wrence and after the car warms up, crack the bleeder valve open and have a container to catch the coolant that comes out. Most of it will start coming out when the thermastat opens. When you stop getting air bubbles from the bleeder valve, snug it back down and make sure your temperature is where it should be. Also, your radiator fan doesnt need to come on unless your engine reaches a certain temperature. just because the engine is up to operating temperature and the thermastat is open doesnt mean that the radiator fan should be on. It's only going to come on if the engine reaches a certain temperature which is determined upon the coolant temperature sensor reacing a certain temperature. My fan hardly ever kicks on in my EG Hatch and it has a stock radiator with a Integra LS engine. So... if you want to see if you can get the fan to come on, after you bleed the system, rev the engine up to 2500 - 3000 rpm and hold it to see if the fan kicks on (shouldnt take more than 5 minutes)
03-24-2005, 02:38 PM
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Re: How do you bleed a radiator? (r3dh4tch)
help...i cant find that bleeder valve!!!! anyone got a picture of how it looks like and where it is on a d16y8? 
03-24-2005, 02:45 PM
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Re: How do you bleed a radiator? (tabrisakakaoru)
Yea i was lookin all around there for it. Is it like a small 10mm round thing that has a hole in the middle of it thats on the top of the radiator?
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03-24-2005, 04:14 PM
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Re: How do you bleed a radiator? (akad3mikz)
ok I was lookin at it again. How the hell do I loosen it up? The damn thing is round and the hole in the middle is round. I dont think I have a tool for that thing.
03-24-2005, 04:19 PM
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Re: How do you bleed a radiator? (akad3mikz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by akad3mikz »</TD></TR><TR><TD CLASS="quote">ok I was lookin at it again. How the hell do I loosen it up? The damn thing is round and the hole in the middle is round. I dont think I have a tool for that thing. </TD></TR></TABLE>
You must not be looking at the right thing. It has a noticable nut around the hole. You can't miss it. (Think it is a 10mm)
</TD></TR></TABLE>You must not be looking at the right thing. It has a noticable nut around the hole. You can't miss it. (Think it is a 10mm)
03-24-2005, 06:27 PM
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Re: How do you bleed a radiator? (r3dh4tch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by r3dh4tch »</TD></TR><TR><TD CLASS="quote">1. There should be a bleeder valve (exactly like a brake bleeder valve) on upper hose inlet i believe (i have a teg LS engine, not too much a d-series guy).
2. get a clear hose to fit over the bleeder valve nipple and get a proper sized wrence and after the car warms up, crack the bleeder valve open and have a container to catch the coolant that comes out. Most of it will start coming out when the thermastat opens. When you stop getting air bubbles from the bleeder valve, snug it back down and make sure your temperature is where it should be. Also, your radiator fan doesnt need to come on unless your engine reaches a certain temperature. just because the engine is up to operating temperature and the thermastat is open doesnt mean that the radiator fan should be on. It's only going to come on if the engine reaches a certain temperature which is determined upon the coolant temperature sensor reacing a certain temperature. My fan hardly ever kicks on in my EG Hatch and it has a stock radiator with a Integra LS engine. So... if you want to see if you can get the fan to come on, after you bleed the system, rev the engine up to 2500 - 3000 rpm and hold it to see if the fan kicks on (shouldnt take more than 5 minutes) </TD></TR></TABLE>
you only have to do this once? or do you have to repeat it again
2. get a clear hose to fit over the bleeder valve nipple and get a proper sized wrence and after the car warms up, crack the bleeder valve open and have a container to catch the coolant that comes out. Most of it will start coming out when the thermastat opens. When you stop getting air bubbles from the bleeder valve, snug it back down and make sure your temperature is where it should be. Also, your radiator fan doesnt need to come on unless your engine reaches a certain temperature. just because the engine is up to operating temperature and the thermastat is open doesnt mean that the radiator fan should be on. It's only going to come on if the engine reaches a certain temperature which is determined upon the coolant temperature sensor reacing a certain temperature. My fan hardly ever kicks on in my EG Hatch and it has a stock radiator with a Integra LS engine. So... if you want to see if you can get the fan to come on, after you bleed the system, rev the engine up to 2500 - 3000 rpm and hold it to see if the fan kicks on (shouldnt take more than 5 minutes) </TD></TR></TABLE>
you only have to do this once? or do you have to repeat it again
03-24-2005, 06:46 PM
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Re: How do you bleed a radiator? (byronl)
Ok I dont have that bleeder valve. Anyone got a picture of a Coolant System bleeder valve from 96-00 Civics with a d16y8?
03-25-2005, 12:14 AM
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Re: How do you bleed a radiator? (137)
uhh I jus replaced my thermostat last week. While replacing it, I found out that my old one was still in great condition. But since I already baught a brand new one from Honda, I might as well change it. I did some research on this and my other problems that Im gettin. I found out that my other problems isnt causing this and I also found out that when air pockets develop in there, this will cause your lower hose to not become hot. Which will also cause your fan not to go on. 
03-25-2005, 01:10 AM
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Re: (Andres-eh2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andres-eh2 »</TD></TR><TR><TD CLASS="quote">From the 96+ SOHC's ive seen they do not have that bleeder screw like the -95.</TD></TR></TABLE>
Haha cool, almost felt like I was the only one that didnt. So anyone got a pic of it?
Haha cool, almost felt like I was the only one that didnt. So anyone got a pic of it?
03-25-2005, 05:40 AM
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Re: How do you bleed a radiator? (komat)
hey Komat, that picture is of a wrench on a bolt that takes off the valve cover. whats that got to do with the radiatot?
03-25-2005, 05:55 AM
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Re: How do you bleed a radiator? (Redline96LX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Redline96LX »</TD></TR><TR><TD CLASS="quote">hey Komat, that picture is of a wrench on a bolt that takes off the valve cover. whats that got to do with the radiatot?</TD></TR></TABLE>
maybe you should look again at the little red circle/box he drew.
maybe you should look again at the little red circle/box he drew.
03-25-2005, 06:02 AM
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Re: How do you bleed a radiator? (dreamer)
my bad. totally didnt see that. funny too, i was lookin at that pic for like 2 minutes and failed to notice. gotta stop smokin weed i suppose. good info, thanks.
03-25-2005, 12:27 PM
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Re: (Andres-eh2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andres-eh2 »</TD></TR><TR><TD CLASS="quote">From the 96+ SOHC's ive seen they do not have that bleeder screw like the -95.</TD></TR></TABLE>
A nother reason I don't like EK's. I would suggest just removing your rad cap and squeeze the hose till bubbles stop coming out (Do this while car is running). Also does it ever start to overheat? Maybe you installed the thermostat backwards. That could do it too. Just a thought. Good Luck
A nother reason I don't like EK's. I would suggest just removing your rad cap and squeeze the hose till bubbles stop coming out (Do this while car is running). Also does it ever start to overheat? Maybe you installed the thermostat backwards. That could do it too. Just a thought. Good Luck