Mystery Coolant leak

[canthus90]

Ok so i been dealing with this for about 8 months now....

I have replaced both head gaskets.... water pump and gasket and the lim gasket and i still have coolant leaking from some where and it's not in the oil.... and no white smoke out of the tail pipe...... flipping driving me crazy oh and not on the passenger side below the carpet

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[Eagle]

elbows?

 

[canthus90]

nope replaced that I only have one it's the old style.... i don't leave any spots it so weird but the low coolant light kicks on.... driving me bat sh*t crazy

 

[slowchevy]

Is it on the ground outside the car?

 

[slowchevy]

I had a bad pet cock that would only leak while the car was running, that's something to check

 

[canthus90]

i tried that i let it idle and get hot enough to kick the fans on nothing

 

[canthus90]

I even rechecks head bolts to make sure they where torqued down.... Only thing i can think of is that there is a small hole in the bottom of my radiator that fills up the tray and fly's out as i am driving

 

[1quick]

have you tryed to pressure test the coolant system?

 

[canthus90]

that i haven't do i take in to do that or is there a tool i can buy/rent?

 

[02BlueGT]

Na or supercharged? The NA UIMs warp, sometimes internally and a small amount of coolant will leak either into the intake and burn, or out onto the transmission.

Either model, a small leak in the throttle body gasket can go un noticed (it just burns in the intake)

any other symptoms, hard starts after sitting for a while? Thick exhaust smoke? Clean spark plugs?

Also, how fast are you leaking, are we talking a gallon a week, or you need to add coolant after 3 -4 months?

Also, LIM end cap under the throttle, look for a leak there...

 

[1quick]

that i haven't do i take in to do that or is there a tool i can buy/rent?

im sure you could rent one someware or they are like 100 bucks to buy if you think you would use it more than once

 

[canthus90]

It's super charged and the coolant to the throttle body is blocked off... nope no hard start fires up the first turn. nope hardly any exhaust smoke.... i changed the plugs when i did the head gasket they looks pretty good on the chart little hot... like half gallon a week....

 

[canthus90]

so i found the dang leak after ripping it down to the heads. The rubber from lim got tucked under the lim aluminum piece and was leaking down the side of the head and on to the header i just never saw any smoke....