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Old 03-16-2009, 10:19 PM   #1
lcesardo
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Member#: 158841
Join Date: Sep 2007
Vehicle:
2002 WRX
Silver

Default Coolant not returning to radiator...

Well, If somebody can figure this out, it's be great.
My problem starts when I run high rpms and make full boost, and what happens is that my coolant reservoir fills up all the way till it spills. I've done several flushes and the coolant comes out clean,
with no oil in it, buy I must say that foam appears and some bubbles when hot, but then cleans up and settles.

Then, when the engine cools down, the coolant won't go back, the radiator will have full level of coolant, but the reservoir near the turbo has a low level of coolant, so what I have to do DAILY is pour the coolant
from the white reservoir to the black one. It doesn't overheat, or at least I don't allow it since I do that every time.

The other thing is that, IF i drive it slowly, no problems of this would occur, they only show up when I RUN the car, city drive gives me no issues at all, no air bubbles at idle.

I think it could be a headgasket, however there is no oil in the coolant or viceversa. However, I must say that my engine has DARTON SLEEVES, FORGED PISTONS AND RODS, and my mechanic says it could be a temperature issue, since I still have the stock radiator, with a 1.1 cap on the black reservoir and a 1.3 rad cap on the radiator, its a 2002 wrx.

Any ideas?
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Old 03-16-2009, 11:46 PM   #2
centeno711
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97 cummins 1ton 4x4

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could be lifting boost at high rpm/boost

run to kragens or whatever they call it in your neck of the woods and get the test kit.....its like litmus paper you dip in ther and it will tell you if you have combustion particles in your coolant.......then you know its the head. otherwise it could be in the plumbing. im not looking at a diagram right now so thats just a shot in the dark.
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Old 03-17-2009, 09:29 AM   #3
kevinh211
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sounds like a blown head gasket
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Old 03-17-2009, 11:24 AM   #4
jays05
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I thought that a non-OEM cap on the radiator was a no-no ?
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Old 03-17-2009, 01:34 PM   #5
squashman
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Symptoms sound identical to mine when my headgasket went. It's a small enough leak that it doesn't affect anything at low load/boost, but get on it and coolant is everywhere.

I'd say your HG is shot. And BTW, a hydrocarbon test on my car showed nothing. It was pulling the heads off that told the tale.
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Old 03-17-2009, 02:34 PM   #6
JoeT
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Yup, sounds like head gaskets. I had exactly the same thing happen to mine, I used Cometic head gaskets, retourqued and all. It would push coolant to the reservoir only during hard runs. I'll post a pic tonight of what the HG looked like after we took it apart. Both gaskets showed leakage of combustion gasses. The strange part was, it never did it when driving normally.

After every session / run with the car, I would let it cool down, then pump the coolant back into the radiator.

ARP Rods
Cometic HG
Forged Rods
Wiseco Pistons
Fluidyne radiator
etc. etc. etc.
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Old 03-17-2009, 03:41 PM   #7
lcesardo
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thank you all for the replies.
I think it could be a headgasket, however, Ive
got darton sleeves too, and what Ive read about
them is that stock cooling system wont get the job
done.

Also, if its a blown headgasket why isnt oil mixing with
the coolant or viceversa, or why am I not losing coolant
or getting air bubbles?

Could it be extra temperature due to the darton sleeves
causing coolant to be pushed out through the white reservoir
and generating the white foam?
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Old 03-17-2009, 04:31 PM   #8
centeno711
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97 cummins 1ton 4x4

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ok ill explain , everyone says head gasket and you still dont believe us. your rings are keeping the oil from passing the piston. if you have oil it will be in small quantities, also the overflow problem that your having is cause when(at high boost) air is bleeding into the water jacket through the hg. this is a big problem because it creates a hot spot in your engine where there is no coolant. the gas that escapes into the water jacket displaces the water and viola it goes everywhere. you could just not worry about it and pretty soon the water you do have will be boiling out of the radiator cap.........trust not good

pull the motor and throw new gaskets on it and viola your good to go. its not as hard as you may think. the boxer engine is very friendly to pull. correct me if im wrong but there what bellhousing bolts and motor mounts and then some accesories and your good to go.

do it yourself, youll have fun and save some bucks......oh yeah and do some new cams while your in there!!!!
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Old 03-17-2009, 05:32 PM   #9
lcesardo
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I know the symptoms point out to a headgasket problem, but I've
recently opened and replaced the gaskets since my darton sleeves
suffered the drop and I was losing coolant, bubbles showed up on the
reservoir tank, and apparently, everything went ok after that, till now,
since Ive started overflowing the reservoir tank at HIGH RPMS.

Im definitely opening the engine to check it out, but still wanted to
to know if anyone has had problems with darton sleeves causing too
much temperature on their engine, since Im getting a new radiator...
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Old 03-17-2009, 05:36 PM   #10
mick_the_ginge
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Oil Dry Sump Goodness

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I have darton sleeves in a closed deck block, sorry your issue sounds like a blown headgasket.
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Old 03-18-2009, 07:14 PM   #11
Fongers
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I'd try a new cap just to be sure its not failing (so much easier) but sounds like a HG issue...
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