Yes cam bearings can spin and block the oil gallery holes, therefore stoping oil from getting to the top of the engine.
Yes it does. Chevy did not use solid lifters in that engine.
Yes it does.
Specs for main bearings on a 2003 Chevy trailblazer with 4.2 engine .
Hydraulic lifters would be STOCK from the factory. On the 84 engine.
No it does not, Unless someone has MODIFYED it.
yes like 350 engine
There is no adjustment- the engine has hydraulic valve lifters.
yes
It's not recommended to change just the lifters. The cam and lifters should be replaced together. To get at the lifters, you can remove the rocker covers and intake manifold, loosen the rockers enough to get the pushrods out, then pull out the lifters.
In a 2003 Chevy Impala, the lifters are located within the engine's cylinder heads. Specifically, they sit on top of the engine’s camshaft and are responsible for transferring the camshaft's motion to the pushrods, which then actuate the engine's valves. Accessing the lifters typically requires removing the valve covers and possibly the intake manifold, depending on the specific repair or inspection needed.
Cam bearings, Rod and Main bearings. That will be all of the bearings required to replace when rebuilding a 350 engine.
hydralic lifters