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everytime i take my rad cap off, coolant explodes everywhere, why?

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Old 07-26-2005, 03:58 PM
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Default everytime i take my rad cap off, coolant explodes everywhere, why?

im running a homemade setup on my stock b18a.. using a civic single core rad.

does this mean i have a blown headgasket?
Old 07-26-2005, 04:16 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (djay86)

Its cause you change the boiling point of the fluid when you take the rad cap off and then the fluid blows out.
Old 07-26-2005, 04:21 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (mike1114)

keep in mind i can take the cap off days after last running the car.. and it still blows out.
Old 07-26-2005, 04:54 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (djay86)

Could be a block in the system. How old is the radiator? Lines? Motor?
Old 07-26-2005, 05:47 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (rainmanef)

rad is brand new. motor has 156k.

lines are as old as the engine.

could i possibly have air in the coolant system from when i changed the radiator?
Old 07-26-2005, 07:13 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (djay86)

I know you said it's new but you might want to try another radiator cap. If the headgasket was blown I'd imagine your radiator would have air in it.
Old 07-26-2005, 07:15 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (djay86)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by djay86 &raquo;</TD></TR><TR><TD CLASS="quote">keep in mind i can take the cap off days after last running the car.. and it still blows out. </TD></TR></TABLE>
haha i was about to say...taking it off right after running it is bad
Old 07-27-2005, 03:29 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (SOHC_MShue)

so does anyone else have this problem?
Old 07-27-2005, 03:56 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (djay86)

I did. After a flush and changing out a few spongy lines/hoses, my problem went away. Just my .02, though.
Old 07-27-2005, 04:05 PM
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Default Re: everytime i take my rad cap off, coolant explodes everywhere, why? (jeef84)

which spongy lines and hoses?

when doing a flush do you just open up the bleeder on the head, and keep the rad full?
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