On Oct 23, 1:49 pm, Raul <alpesh.pa...@gmail.com> wrote:
> My 94 Civic has the check engine light on. Mechanic says its the O2
> sensor, which sounds reasonable. However, he says that the sensor is
> essentially melted onto the intake manifold, so that the IM needs to
> be replaced too. Does this make any sense? The IM replacement is way
> more expensive.
>
> Thoughts?

Like everybody said, it's probably stuck into the exhaust manifold,
and it's probably more feasible to remove it with penetrating oil,
heat, and brute force than replace the manifold. Because if it's
stuck, then i can guarantee you that the mounting studs and nuts for
the manifold to the head and the catalytic converter are going to be
equally stuck, and there are more of them than just the one sensor,
and it's less feasible to just destroy them to get them out and
replace them than it is with the sensor.