How it goes

[tinypanzer]

Buy a timing cover seal and a camshaft seal with the intent of doing your front timing cover. Take off the distributor cap, and you realize that your cap and rotor are fried. Take off the rotor adapter and you destroy it along with the back cover to the distributor cap. Bang out the old camshaft seal and you realize the dealer gave you the seal for the crankshaft.

And that's how a $25 job turns into a $250 job.

Oops. Just snapped an old brittle vacuum line......