Coolant bubbling in over flow, questions.

[The_EE]

Coolant starts to bubble in the over flow and pushes out. Happens when not in boost and after I go into boost., quicker when I get into boost.

Things that I have done to remedy the situation.

1:Replaced Thermostat.
2:Replaced Radiator cap.
3:Used Ultraviolet dye in system and pressurized
3a:Replaced Heater lines ( they were from 97 and Leaked when pressurized )
3b:Replaced lower radiator line ( Leaked when pressurized )
4:Switched radiators
5:Checked torque on ARP's and they all check out at 90 tf lbs
6:Checked compression, 180-180-180-180
7:Exhaust gas in coolant test came back clean
8:No oil in coolant
9:No coolant in oil
10:No smell of coolant in exhaust

I didnt replace the water pump since it was relatively low mileage on the old motor.

So only thing left is Water pump right?

I am getting ready to upgrade to 1600cc injectors and a gt3582r and I want to get this taken care of before I put an expensive water cooled turbo on the car .

Mods are listed down below. Engine has approx 650 miles on it.

97 GSX:Ross/Eagle combo,7-bolt block,JMFab 1g race SMIM, Fluidampnr,FIC 950's, Aeromotive AFPR,1g CnC ported head, 272's,1g TB,TD06H-20g,DSMLINK,3" Turbo Back N1, FP 4" Intake,AEM WB,Clutchmasters S5 4 puck unsprung Clutch,GReddy UICP & FMIC,5 Speed swapped,Eibach Prokit,RRE & Ingalls C-kits,Tial WG,Punishment Mani/o2, Findezza Cam gears -3* Exhaust +1* Intak

 

[Bubbs Malone]

Again, check for leaks....

 

[toojung2die]

Positive. I have a OEM Cap straight from Mitsu. I have tried 5 different brands of caps.

Is it a 13+ psi radiator cap? It should be.

 

[The_EE]

Again, check for leaks....

Ill rent the tool to presurize the system tomorrow when I can cash my checks as the bank is closed.

Whats the highest I can test to?

 

[The_EE]

Is it a 13+ psi radiator cap? It should be.

Yes it is, its a brand new OEM Mitsu Rad Cap, 13 psi and I pressure tested it as well and it held fine.

 

[The_EE]

Question.

Stock mitsu Head gasket on a engine .020 over.... Problem?

Seems Mitsu F'd up and gave me a stock gasket.

 

[jwcardy]

Its ## headgasket for sure...my (modded)srt was doin the exact same thing...normal drivin was fine but when the car go into boost it was pushin coolant past the head gasket and causing the car to overheat...changed the headgasket and better studs and problem solved...i went through every test u did...change the gasket, get new head studs and u back on the road...torquing the studs tighter isnt goin to help if ## gasket its done...
-wes

 

[The_EE]

Its ## headgasket for sure...my (modded)srt was doin the exact same thing...normal drivin was fine but when the car go into boost it was pushin coolant past the head gasket and causing the car to overheat...changed the headgasket and better studs and problem solved...i went through every test u did...change the gasket, get new head studs and u back on the road...torquing the studs tighter isnt goin to help if ## gasket its done...
-wes

I just wanted to see if it would change anything, didnt really do much, maybe a little.

Hopefully Sunday I will have the car running again. If I can get all my parts in time.

 

[CRAIG___]

my gst when i would cut my car off the coolant would bubble up and pour out of the overflow i figured out my fans wasnt working i hooked them to a switch when i run my fans it stopted it but the temp guage never got hot before but coolant ran out after i wired my fans to the switch never done it again

 

[The_EE]

my gst when i would cut my car off the coolant would bubble up and pour out of the overflow i figured out my fans wasnt working i hooked them to a switch when i run my fans it stopted it but the temp guage never got hot before but coolant ran out after i wired my fans to the switch never done it again

Already tried that, used DSMLink to keep the fans on 24/7 and no change.

 

[ricktb]

When you purge the system each time do you have the heater on high? maybe theres some air pockets in the heater core, I dunno if this would cause air bubbles in the resevoir, just a thought.

 

[GofaST4life]

I have a question...my car was doing this "pushing the coolant out" thing, and the car would run maybe a little hot and the gauge would be a little above dead center.

but i dont have the money to do all the things the OP has done, so i blocked off the overflow to keep all the coolant inside. Im thinking that was a bad idea(?)

 

[RedWagon]

to add more to this topic, I recently replaced my head gasket and installed ARP head studs and I noticed that when I run my AC my car will overheat. Once I shut off the AC it stops overheating. Im only using 1 fan since my turbo/intercooler allows only 1 fan to fit.

 

[EagleTSIawd]

... i blocked off the overflow to keep all the coolant inside. Im thinking that was a bad idea(?)

yeah, that is a bad idea. since you blocked it pressure will build up possibly blow one of your hoses then you will loose all of your coolant. You need to replace that headgasket and get some arp studs. since you are low on cash, try to avoid boost untill you save up enough to replace it but i would try not to drive at all if possible.

... I noticed that when I run my AC my car will overheat. Once I shut off the AC it stops overheating. Im only using 1 fan since my turbo/intercooler allows only 1 fan to fit.

to run a/c you need to use both fans, its just too much work for a single fan. you can use two slim fans and that should solve your problem but when you are not using the a/c you might melt the a/c fan because its too close to your turbo. Although, if you have a heatshield and wrap the turbo and o2 housing you can decrease the chances of that happening

 

[GofaST4life]

yeah, that is a bad idea. since you blocked it pressure will build up possibly blow one of your hoses then you will loose all of your coolant. You need to replace that headgasket and get some arp studs. since you are low on cash, try to avoid boost untill you save up enough to replace it but i would try not to drive at all if possible.

i was really hoping it wasnt the head gasket, that really ruins my day...

 

[triggerx]

While I know this is an old topic, I have had the same problem, so hopefully this advice helps.

Replace the Radiator Cap, Upper Hose and Lower, 50/50 maybe even add slightly more water.
After that mine stopped boiling, havent had the problem since

 

[ramsack]

AIDS tests are sometimes false positives, so maybe the tester for the exhaust in the coolant is giving you a false negative? it could be such a miniscule leak or your exhaust doesn't contain what the tester is looking for? what do they test for?

 

[One Equals Two]

I noticed my car would overheat when anything was amiss. When the entire cooling system was replaced, and when I added waterwetter, and when I flushed it, and when I put high flowing fans on it, it finally stopped overheating....unless I idled for 20 mins or so. It was just too modded and making way too much heat and would always overheat regardless of how good a shape the cooling system was in. It ended up needed a twin (big and small radiator) and that solved it.

 

[BIRDCLAWTSi]

Is it possible something got put in wrong on the rebuild? I had a vette come in during the summer doing the same thing. The last shop to do the lower intake gaskets put them in wrong and the coolant passage was blocked by the gasket. When the car warmed up it boiled out of the overflow bottle. I just cant really think of anything that could be in backwards on the 4g63, I dont think the headgasket could even be put on wrong. If you have a cooling system pressure tester, Hook it up and start the car,Watch the gauge,If it build pressure fast then i would say headgasket. You wont always have combustion gas in the coolant from a headgasket going bad. Good luck.

 

[EclipticalGS]

not sure but I had this same problem and my heater core was pugged and needed replacement and my boiling coolant went away

 

[macks96boltdsm]

I have the similar issue going on right now with me and i need help. I have about a half a bottle of coolant overflowing into my overflow bottle but absolutely no bubbling and car will see temp of 223 and 226, if i dont keep my heat on it will see these temps regularly. it only really bad on hot day also. But if i have my heat on and turn the ac fan on it will only have temps of 210 213. Im trying to not ride around wit the heat on in the summer time any more, my radiator is not in the best condition and i am going to switch to a 180 thermostat. But i wanna get opinions on if its a head gasket or a heater core problem since keep the heat on keep it from gettin hott, just trying to save myself some money.

 

[GSTurbo1]

Yeah I read your thread, I remember that,

I dont think its anything to do with any cracks in the block, block checked out fine before I assembled the motor.

I am just going to order a OEM Waterpump ( as the one on the car is not OEM ) and a head gasket and just do both at the same time so I dont leave the last two stones unturned.

What I will most likely do is this, replace the water pump and see if that solves my problem, if it doesnt then I will pull the head and replace the head gasket. I dont have the cast to get the engine o-ringed as I am currently unemployed and really, dont know of any shops local to me that could do the work. I am new to my area and there really isnt a whole lot around.

Moved from So Cal to Misery ( Missouri )

Same problem for me, I am in the process of Cometic HG replace and new water pump. Crossed fingers!

 

[Aramane]

Maybe a plugged heater core? I know it's rare but, I say this because the heater core hoses were leaking, maybe there's a blockage making it pressurize in that area.

 

[danielkile]

head gasket