check ur radiator cap, if dats still good, then it may be ur head gasket. if dats the case, a compression test may be in order to determine the real problem..
check the radiator also...try flushing it first...better yet service it...i've seen rust material clogged up the water passage in the radiator...pressure built up and the water got nowhere to go...end up escaping and overflowing the reserve tank...
try change cap 1st.
still overflow?maybe head
check ur radiator cap, if dats still good, then it may be ur head gasket. if dats the case, a compression test may be in order to determine the real problem..
xtremeleo bro,
i wanna to tumpang thread ya...may i know how to use the method compression test onto our 4age 20v?:wavey: