They have problems with yhe intake manifold gaskets. Felpro has a improved set that do not leak.
A blown head gasket could cause an engine to overheat, just like a bad thermostat in an Impala. One difference is the head gasket will probable leak coolant, either in the cylinders or in the oil.
It will solve the problem. The 3.4 is notorious for poor head gaskets. You can replace the gaskets on the engine without replacing the engine, and that will solve the problem for quite a while. It will be much less costly than an engine replacement.
about $600. Std. labor estimate is 5.47 hours to lift engine, replace gasket, replace engine and realign steering.
The cost to replace a head gasket on a 1995 Chevy Impala is between $1800 and $2200. This job is very labor intensive and requires replacing many of the engine major gaskets.
You need to purchase a Haynes Manual for you particular car. It will be a great investment if you plan to work on your own car.
Engine coolant leaking internally and/or externally.
What gasket?
that is a bad head gasket or blown head gasket the engine needs to be repair
If both surfaces are clean and flat and you are using a new gasket, no sealant is necessary.
The engine overheating, or a faulty gasket, or problems with hot spots in the engine.
The intake gasket(manifold) will not match the 96 engine. I believe the 97 engine was the last year for the older style.
scan for codes ?bad head gasket? check compression to verify