ok guys heres the thing, i fill up the radiator car runs good awsome power dyno @ 298 whp. i drive the car to work everyday about 120miles a day RT and is all HWY, so im looking about 3k miles a month last night i noticed my car was starting to over heat and i immediately pulled over and check the radiator it was empty, last time i filled it up was 2 months ago there is NO milkie stuff in the oil. Does NOT smoke, and the compression is GOOD, i did a search but couldnt find anything. what can it be?

 

DANG noone?

 

DANG no info...
what car?
what motor?
hom many psi?
built block?
head studs?
could be a coolant leak under boost... head lifting?

you said that you did a compression test
what was the results?
do a leak down test.

 

Its probably a blown headgasket, especially if it starts overheating every now and then. Thats what happened to me anyways.

Fill your radiator up and do a leakdown with the cap off. Let the leakdown force air into your cylindeer for about 30 seconds and notice if any air bubbles come out of the radiator.

 

I used to get those issues every now and then. When i pulled the head it was always small tiny hair line cracks in the upper area of the sleeve.

 

Do you have a cometic head gasket by any chance?