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bubble in my radiator.

 
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Old 04-11-2014, 11:58 AM
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bubble in my radiator.

Hi guys, i have question.
Yesterday i check my coolant level on my 90 prelude. I see the coolant level is a bit low but there are bubbles in it. And the coolant is abit dirty too. I just got the car for 3 weeks ago. when i bought it i go with my friend and everything looks good. When i started it and start to rev it, i see a lots of small bubbles coming out. Is this a sign of blown headgasket for sure? This is what i am afraid of. i just got the car for 3 weeks and now this thing happens.
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Old 04-11-2014, 02:40 PM
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Re: bubble in my radiator.

When you say "dirty", what color does that translate to? Can't say for sure, but brownish coolant and bubbles doesn't bode well.
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Old 04-11-2014, 05:05 PM
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Re: bubble in my radiator.

How about your motor oil? Does it appear normal?
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welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
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Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
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I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

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Old 04-12-2014, 01:20 PM
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Re: bubble in my radiator.

Compression test?
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Old 04-14-2014, 04:03 PM
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Re: bubble in my radiator.

sorry for the late reply guys. the motor oil looks normal.
I havent check the spark plug and do compression test as well as cooling pressure test yet. its been busy lately due to work full time and school full time not to mention its almost the end of semester.

I also notice that, my cooling temp sensor isnt working correctly. I mean it takes forever to raise to normal operating temp, and sometimes when the engine is hot ( i know from turn on the blower) but the temp gauge show its still not hot at the normal operating temperature) is it my coolant temp sensor?
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Old 04-16-2014, 12:43 AM
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Re: bubble in my radiator.

i check it today for bubble in my radiator, but somehow all the bubble is gone now.
when i rev it i dont see bubbles appear anymore.
i do the cooling pressure test, it seems fine, it doesnt lose pressure very fast.
my friend have a borescope (not sure if i pronounced it right) and we take a look inside all 4 combustion chambers, all 4 chambers are full of carbon. but none of them is clean like there is a sign coolant run into the chamber. but engine run pretty hot....
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Old 04-16-2014, 08:55 AM
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Re: bubble in my radiator.

Change out that sensor and go from there. I run 2 temp gauges in mine.
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Old 04-16-2014, 02:45 PM
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Re: bubble in my radiator.

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Originally Posted by TheNutsCracker View Post
i check it today for bubble in my radiator, but somehow all the bubble is gone now.
when i rev it i dont see bubbles appear anymore.
i do the cooling pressure test, it seems fine, it doesnt lose pressure very fast.
Could have been just a little air in the system -- that's not unusual. Is the color still odd? And how fast is "doesn't lose pressure very fast"?
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Old 04-16-2014, 03:14 PM
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Re: bubble in my radiator.

seems like its holding pressure, i put 15-17psi in the system. it takes 5-10 minutes to drop about 0.5 psi, my friend told me that maybe just the pressure test kit seal is not sealing tight.
Coolant color still dirty. i guess i will flush the coolant.
As for the temperature gauge faulty not working properly, i will replace the thermostat and see how it goes. my friend told me that might be the thermostat stuck open so thats the reason why it takes forever to get the temperature gauge to go up.
i hope its not the head gasket... ouch!
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Old 08-02-2014, 03:42 AM
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Re: bubble in my radiator.

I find out what the problem for my bubble in the radiator
I decided to do timing belt because it has 150k miles and I don't know if the original owner ever get the timing belt changed.
So, I find out that my water pump is leaking. I think that cause air being sucked in to water pump when the engine is running and create bubble.
I think I'm lucky to change the timing belt because that belt is about to snapped. I also replaced thermostat and gasket and spark plug, wire, cap and rotors.

Now the engine is running. But the problem now is coolant temp goes up really quick, so far no overheat. Before timing belt being replaced, the coolant temp goes up really slow. On top of that, engine idle speed goes down to 500-600 RPM right after you let go the pedal after your rev it high.

I haven't adjust the timing yet. hopefully everything is good and the timing is work on the right mark/line.
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Old 08-02-2014, 07:32 AM
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Re: bubble in my radiator.

5-600 is normal for idle.
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Quote:
Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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Old 08-02-2014, 11:08 AM
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Re: bubble in my radiator.

Oh okay. i thought normal operating temperature idle speed is around 700-800. I guess im just being paranoid because before my cae will idle really high. Its idle at 1400-1500 rpm after startup and goes down to 800-900 after engine warm up.

And im more sure about this. I also not sure if you guys pay attention on your rpm gauge when driving. My rpm gauge become slighty retarded after new timing belt is on. I notice it when i drive on freeway with 65-70mph and 3200rpm. After i let go the pedal the rpm gauge is not going down ar normal speed (on level surface, not uphill or downhill). Is takes around 4-5 seconds to drop from 3200rpm to 3000 rpm.

Maybe Im just being paranoid coz i have a 95 civic 4door and it doesnt have rpm gauge, so i cant tell if is normal. Thank you all for sharing knowledge about this 3rd ge prelude :)
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