Pushing Coolant into Oveflow

[Clinical]

So I'm just mainly looking for other suggestions on other things to check before I replace my headgasket.

I'm pretty sure it's the headgasket but I just want to be double sure I'm not forgetting to check something else.

The car has never overheated, never gone past the middle at all. Car ran the track back to back 1st-2nd-3rd-4th gear 122-124mph runs without ever heating up.

It's pushing coolant into the overflow, I usually empty it every few days if I drive it much. The other day it was already about half full and I did a 2nd-3rd pull, and then another full 3rd pull.

I got home about 3-4 minutes after that and parked it and had coolant boiling all foamy out of the overflow. Mind you the car never heated up at all, I'm paranoid and check my temp gauge every 20 seconds basically after my talon had its issue heating up.

Radiator cap is brand new.

I'm running 25psi on E85 with only about 16degrees of timing on a eagle rod / ross piston bottom end with a built head with only an OEM headgasket. So I'm not going to be surprised if its the headgasket.

Just wanting to see if anyone else has any other suggestions to check.

 

[agentorange313]

sounds like you need to do a compression check to see if it you head gasket.

If you head gasket is blown, thee is a chance there is coolant now mixed with oil. Check both the oil and coolant to see if thee is a milky color.

What type of head gasket are you using?

If you coolant is boiling, and the temp gauge is not rising in correlation tot he temp then something is wrong with the temp gauge. Also there might be an issue with your thermostat.

 

[Clinical]

sounds like you need to do a compression check to see if it you head gasket.

If you head gasket is blown, thee is a chance there is coolant now mixed with oil. Check both the oil and coolant to see if thee is a milky color.

What type of head gasket are you using?

If you coolant is boiling, and the temp gauge is not rising in correlation tot he temp then something is wrong with the temp gauge. Also there might be an issue with your thermostat.

It's an OEM headgasket, completely mitsubishi oem.

I just replaced the oil about a week ago and it was normal looking.

I'll do a compression check hopefully next week as I'm all tied up with work this weekend.

 

[Boomdeeze]

My overflow tank kept filling up until I finally figured out I was missing the hose that hangs down into the overflow. Not saying that you are, but it could be something to check.

 

[agentorange313]

There are different oem head gaskets for mitsu.

ones that are stronger then others. Metal and felt oem gaskets.

Metal is the one you want to be using. Felt is for stock boost applications.

 

[Clinical]

Well yeah I know that, my whole deal is the fact I want to run a MLS headgasket anyway.

It's running a stock OEM felt gasket.

I have an aftermarket overflow, it isnt recirculated back into the radiator, however to my knowledge it shouldnt be pushing coolant period

 

[Jesse__c]

im having a similar issue. but i can see my gauge go up and im runnin link so its tellin me that im runnin hot but i dont know what the problem is. i dont have to empty my coolant though. it goes back and forth. and it doesnt do it all the time for me. it may be heat from my turbo and exhaust manifold heating up the radiator. just a guess.

 

[agentorange313]

what do you mean "however to my knowledge it shouldnt be pushing coolant period?"

The whole point of the coolant reservoir bottle is for the expansion of fluids. When coolant gets warm it expands and take up more space. As a result the fluid is pushed into the reservoir tank. When the coolant cools, it contracts, drawing through vacuum the coolant back into the engine.

What does the aftermarket coolant take look like? does it follow the same set up as the stock, with a vent tube? This is needed because with the constant changing of pressure to a vacuum or positive pressure environment, the air is needed to displace the coolant.

 

[ilovemy420a-t]

my car was doing the EXACT same thing i tried everything the only fix was my head-gasket

 

[JusMX141]

Do you recall what your head studs are torqued to? One of my close DSM buddies had trouble pushing coolant on an OEM gasket when his ARP studs were torqued to whatever ARP called for on the paper enclosed with the studs themselves. Now all of my ARP studs get torqued to 95-100lb/ft with moly lube.

 

[Calan]

Do a leak-down test before just yanking off the head. It will give you a lot more information about what is going on than a compression test alone will.

Compression and Leak-Down Testing

Do you have a blown head gasket?

 

[Clinical]

Here's an older picture of the engine bay.

However the coolant overflow is still the same spot and all.

 

[Bluefire16]

You are sure both fans are kicking on? I have mine wired so that if i want them on, i just hit my AC button and they both kick on....everytime.

 

[TSIfreek]

I would do a leak down test as well as it will tell you what cylinder your problem is. When doing the test have the radiator cap off so you can see if any bubbles start happening while doing the test. If you see bubbles the head gasket is not sealing.
Also check your upper radiator hose after doing a pull and see how hard it is. If its rock hard then there is excess pressure from the combustion chamber entering the cooling system and pressureizing it.
If you have had coolant boiling over inside the resivor then that most likely is a head gasket problem.
You should also have an over fill tube on your tank as if the tank gets to full it pushes it out on its own. It should not be sealed.
25 psi and 16* of timing is real safe on E85 Im running 20 at the very top.

 

[Clinical]

I would do a leak down test as well as it will tell you what cylinder your problem is. When doing the test have the radiator cap off so you can see if any bubbles start happening while doing the test. If you see bubbles the head gasket is not sealing.
Also check your upper radiator hose after doing a pull and see how hard it is. If its rock hard then there is excess pressure from the combustion chamber entering the cooling system and pressureizing it.
If you have had coolant boiling over inside the resivor then that most likely is a head gasket problem.
You should also have an over fill tube on your tank as if the tank gets to full it pushes it out on its own. It should not be sealed.
25 psi and 16* of timing is real safe on E85 Im running 20 at the very top.

Yeah there's a little hole if you can see it in the top of it that it comes out of when it gets too full.



And yeah both fans are kicking on, one comes on whenever it needs to and the other is controlled by a switch inside that I keep on most of the time.

 

[Jesse__c]

did you figure out the problem yet?

 

[Texas gst]

If it's boiling than you are losing pressure somewhere. It doesn't have to overheat but could still not hold enough pressure. Pressure test your cap even if it's new and make 100 pct sure there's not an air pocket in it. If that's all good. Prob head gasket imo

 

[overboosted1g]

I had the same problem the car ran great but was pushing coolant do a leakdown test but I'm pretty sure your headgasket is blown ... My .2

 

[DSM_Roller]

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[Jesse__c]

If it's boiling than you are losing pressure somewhere. It doesn't have to overheat but could still not hold enough pressure. Pressure test your cap even if it's new and make 100 pct sure there's not an air pocket in it. If that's all good. Prob head gasket imo

how do you do that?