blown head gasket?

[gtcoupeaust]

Took the car in to get tuned and they diagnosed a blown head gasket..
Compression test showed all cyl's at 160psi except no.1 which was at 140psi.
They did a radiator gas test and that showed positive.
It doesnt overheat. temps are low always and there does'nt seem to be radiatior pressurisation..
does this really mean a blown gasket or is it just slow weeping compression in to the coolant?
Do i start ripping it down in the morning or not? (Stock heads, stock gaskets)

[speedytang]

That PSI test is about in range. It could even be the lower intake gasket because your not showing any of the signs that point to a head gasket.

[gtcoupeaust]

will the upper intake gasket still show a positive on the radiator gas test. wouldnt it still be oxygen only at this point. and a head gasket showing carbon monoxide/dioxide which ever it is.. (and did you mean lower intake gasket?) i did recently just install a new intake

[speedytang]

Corrected - Lower Intake Gasket and Upper if the EGR port did not seal correctly.

[F=MA]

It's likely done a classic small block ford burnthrough to the upper coolant passages. It won't show as a big performance deficit but, it's blown nonetheless.

Hell, I drove my car like that for over a year once. Even went to the track a few times. :^)

F=MA