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If the crank shaft in a 1990 gmc pick up went bad how will truck drive?

A bad crankshaft in a 1990 GMC pickup will make the truck completely undriveable. Here's why:

* The crankshaft is the heart of the engine: It's the rotating shaft that converts the linear motion of the pistons into rotational force, which powers the wheels.

* A bad crankshaft can't rotate properly: If it's cracked, bent, or has worn bearings, it won't be able to spin smoothly.

* No rotation, no power: Without a properly rotating crankshaft, the engine won't produce any power, meaning the truck won't move.

Symptoms of a bad crankshaft:

* Loud knocking or rattling noises: This is usually a sign of worn crankshaft bearings.

* Engine misfiring: A damaged crankshaft can affect the timing of the engine, causing misfires.

* Engine overheating: A damaged crankshaft can cause the engine to overheat due to poor lubrication or lack of cooling.

* Oil leaks: Worn bearings can leak oil, leading to low oil pressure and potential engine damage.

If you suspect your crankshaft is bad, it's crucial to have the problem diagnosed and repaired immediately by a qualified mechanic. Driving with a bad crankshaft can cause further damage to the engine, leading to expensive repairs.