My intake manifold leaks like a sieve

moper said
The knockoff I used leaked almost that quickly. But it was sealed. The coolant was coming from casting porosity. Pull it and make sure the intake
Actually fits- then you can choose a gaskets that should work.

This Knockoff ran fine on my engine for about 3 yrs and 50k of daily driven miles.
No leaks.
I replaced the heads and thats when the leak started.