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2G 1Gina2G: Cap Off to Burp but Coolant Flows Out After Warming Up

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boofer

Probationary Member
5
0
Mar 14, 2005
Northern, Virginia
I thought I just had air pockets in my coolant lines because my engine bay would seem a bit hot. So I drained the coolant to do a flush before adding new coolant and then trying to burp it.

I have a spill-free funnel that I attached to the thermostat housing cap (i have a Fluidyne radiator). I add the flush and then topped off with water from the hose. I started the car to let it run for 5 minutes but after 3 minutes the fans kicked on and the coolant started to overflow out of the funnel. Kinda like when your toilet backs up and you have to reach down and cut off the water.

I kinda confused on the cause of it overflowing. The thermostat is 1G 190* (88c) and works. I pulled it the other day to make sure I didn't have a stuck thermostat. I submerged it in boiling water the other day and it fully opened in about a minute.
 
When your car warms up to temp your coolant will rise out and come out of the neck with no cap on. If your coolant is bubbling up and being ''spit'' out of the neck, You may have other problems (In example, What usually happens when you blow a head gasket etc) I'm not exactly sure on your question though. Does it overheat?
 
Like I said I had the funnel on the neck. The funnel is about a 1/2 gallon and it filled up and out. I didn't happen to take a look at the temp when it happened. I was more fixed on not getting coolant flush everywhere. But the coolant itself was not hot.

My question, I guess is, if it's supposed to spill out everywhere because the video I watched about burping your coolant, his cap was off, had the funnel on and it only bubbled a tiny bit when an air pocket worked it's way out. That's not a experience I had, at all.
 
The only way coolant usually comes out is when it is over filled, When it reaches operating temp , when the t-stat opens up and the cap is off, And when you have issues with the actual engine (headgasket etc but then it would be ''shooting out''.
 
Compression tested. (1G w/ 8.3:1 & 0.02 Over) - 130-115-127-168

I'm not really sure what the true compression is supposed to be but I got this eerie feeling this isn't the good. This might also explain why my coolant looked like Old Faithful.

Thanks 1993 for the insight.
 
I think it's time to pull the head, And check the headgasket. This would explain why your coolant is ''shooting out'', as soon as you start the car. Your compression numbers are way out of line. I'm assuming as I said in a previous post, That you could possibly have a blown headgasket. If your coolant is ''milky'' (oil mixed into coolant), vice/versa, Then it is more then likly a sure shot that is your problem.

Hopefully, It is only a head/headgasket problem and not a problem with your shortblock. If you need ANY help, Just send me a mesage. I reply every day within hours, All the time.. I'm free all day every day aswell so if you needed to ''hear'' your help, then I can speak with you over the phone aswell if you planned on tearing it apart and needed some help/information/guidence.
 
Even with compression numbers being totally below the standard, Actually even below the recommended service limit? I'm not saying you are wrong, But the compression numbers are stating there is a bigger problem.

Please just keep the thread updated if you need any help, I'm around all day, every day, any time, To help you with what ever you need, Even if you need to talk over the phone about the problems you're having with the car.
 
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