  We calculate the contribution of pions to the $\bar qq$-expectation value
$\kappa(\rho)= <M|\bar qq|M>$ in symmetric nuclear matter. We employ exact pion
propagator renormalized by nucleon-hole and isobar-hole excitations.
Conventional straightforward calculation leads to the "pion condensation" at
unrealistically small values of densities, causing even earlier restoration of
chiral symmetry. This requires a self-consistent approach, consisting in using
the models, which include direct dependence of in-medium mass values on
$\kappa(\rho)$, e.g. the Nambu-Jona-Lasinio-model. We show, that in the
self-consistent approach the $\rho$-dependence of the condensate is described
by a smooth curve. The "pion condensate " point is removed to much higher
values of density. The chiral restoration does not take place at least while
$\rho<2.8\rho_0$ with $\rho_0$ being the saturation value. Validity of our
approach is limited by possible accumulation of heavier baryons (delta isobars)
in the ground state of nuclear matter. For the value of effective nucleon mass
at the saturation density we found $m^*(\rho_0)=0.6m$, consistent with nowadays
results of other authors.
