Odd Issue with 2.0 LSJ
 

Don't know what to do...my car started leaking coolant and i have no idea where its going ..ive took it into the dealer 3 times and they cant figure it out....they say there are o leaks..i dont see oil in the coolant and my oil doesnt look milky like the coolant is mixing witht the oil and any suggestions yall would have to look at please give me some advice im at my wits end....

you say leaking coolant...how do you know it's leaking, the tank keeps going low, or?

yeah every week or so depending on how much i drive i get the low coolant on the DIC and the resivor is almost empty

I have the same problem, only mine is after a few month. They pressure tested and everything, and found nothing....

Probably your head. Buddy that came down to get tuned was having the same problem, eventually they came up with head, switched and I believe it ceased.
Unless your head is lifting under boost, which you could see it stain the block/head.

Any white smoke (not condensation) coming from the exhaust?

When a headgasket goes, it can leak coolant into the combustion chamber instead of the oil, which obviously will make the oil appear normal.

Zero White Smoke...isnt that something the dealer would look for i mean those are in the top reasons that coolant is leaking i hope my dealer is a little smartter than that

If no smoke then prob def what I said. Ask them about a porous head, if you still have warranty, lol.

Mine was leaking from here once. One of the washers wasn't in place. Never found any coolant because it only leaked under pressure and burnt off while driving.
http://i839.photobucket.com/albums/z...705-1828-1.jpg

no warranty...how does it costs to get one of those replaced ? and by porous what do you mean is there damage to it like it needs to be replaced to can it be repaired ?

how did you end up figureing it out ?

Well you dont wanna go to a dealership if u don't have warranty, I'm not saying it's 100% your problem but buddies car had the same symptoms. Porous as the inside of the head is jacked up lol IDK how to explain it but some of the lnf heads have the same problem I believe.

Situation was a little diff....we just swapped the motor. My mechanic and i were looking at it and he could see a little residue and when he squeezed the radiator hose with car off it started oozing out of that feed.

looked on the internetz and this is what is said about pourous heads

The quickest way of telling is to look at the coolant tank. As mentioned before if a head has gone porous, then water and oil mix. This produces a brown sludge like substance, similar to curry in the coolant tank . Its most obvious of the coolant cap as you take it off as the pressure builds up in the tank and leaves a residue on the inside of the cap. But that could also mean the head gasket as gone as well. What ever the reason, if you find the brown sludge in the coolant tank, its bad (expensive) news.

u ever change ur header ?

yes i got the GM honed exhaust manifold..

did you have mess with the water pipe when installing the honed manifold? oe pry against it or anything ?

Good idea sunburst......even if it isnt the issue....alot of people overlook that

not sure had it installed by the dealer when the stage 2 many moons ago..this started wayyyy after that

Any other thoughts ?

bump

I had the same problem, had to replace the heat exchanger pump. I guess the the coolant wasnt pumping through the heat exchanger and boiling out the overflow.

this has been going on in my car. i seen the sludge coming from the head but i figured they were just from the mechanics. i have to get this fixed its getting on my nerves. i hate filling my tank every 5-7 days. thanks for all the info guys.

he is talking about the engine coolant not the heat exchanger coolant. They are 2 seperate systems
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Yeah the engine coolant....im hearing this clicking sounds when i start the car also...doesnt seem to mkae a sounds once the engine is warmed up and my coolant Temp seem to hang aroung 160 while im driving highway city it starts 160 but i have to be drinving for awhile for it to get 180+

anyone?