If oil pressure is low or drops to near zero during an idle, the bearings are shot and the engine needs to be rebuilt. If the compression is low (run a compression check on all cylinders) on one or more cylinders, you probably have bad valves. If you have blow-by or burn oil you probably have worn rings and/or tapered cylinders. If you EVER hear heavy knocking when the engine is first started you probably have bad main/rod bearings.
Yes, any engine can be rebuilt unless the block is cracked. Just because it overheated does not mean it will needs to be rebuilt. Have it inspected by a tructed mechanic.
Need to know the price on a 1976 el camino
unless you know previous owners, you pretty much cannot tell if rebuilt
Sounds like the linkage that goes from your gearstick to the transmission needs adjusting.
The timing chain needs no maintenance. It is designed to last the life of the engine and is replace when the engine is rebuilt.
Just the engine... it will depend on the year and if it is complete in running condition or needs rebuilt.
sounds like to me your transmission needs to be rebuilt
It may need oil? Or motor needs rebuilt.
Their are very few physical advantages of having a rebuilt engine. The only actual advantage of having a rebuilt engine is that it is much cheaper than a new engine.
It usually requires a valve job at the minimum.
Everything that got destroyed would need to be rebuilt.
The engine needs fuel, compression and spark to run. You are missing one of those. Whoever did the install forgot something.