Gotpepsi

During an oil change, upon the first start-up, I noticed that the oil light stays illuminated longer than usual. During this time, I can also hear tct noise until oil pressure builds. Does this cause wear on the engine?

sillyboybmxer

you're fine.

Slowcrash_101

Is that really TCT noise? I noticed it doesn't sound like that if I fill the filter with oil and crank the car a few times without letting it start.

B serious

It is the TCT. The reason you don't hear it is that you're cranking the car to oil prime it.

Its a pretty normal scenario. Oil priming will eliminate the rattle. But...oil priming is probably pretty hard on the starter.

Slowcrash_101

No harder than starting the car, I just go 2 cranks pause then start her up.

B serious

Ah, ok. Usually, oil priming from scratch means unplugging the fuel and/or spark delivery and then cranking for 15 seconds at a time until the oil light goes away.

If just bumping the button works, then that's good.

Gotpepsi

Why is there low oil pressure? Is it because there is a little air in the oil filter?

B serious

Because you drained the oil from the pan and pump.

Gotpepsi

So does the engine essentially run dry for a brief second?

sillyboybmxer

not "dry" but yes . You gotta think about the oil that is stuck to the internal engine parts. Its still there but this is why most of an engines wear occurs at start up and having a thin oil at start up is important