you didnt say what motor, there are like 8
but if it is like this 8v , this will help
block is same on 16v.
id have a car HOT, and full pressure under RAD cap, 12.5psi (normal)
then with a mirror and running, look behind head.
look careful.
there are no freeze plugs on rear of head or block so that is not it.
my guess. it s comming from intake gasket bad or cooling tubes,
but you didnt say what engine so i can help too much.
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