2001 Sunfire, 2.4 L, Engine Shaking

[Static Sloth]

Hello,

I have a 2001 Pontiac Sunfire with a 2.4 liter engine.

I just had the waterpump replaced and the lower coolant tube, I believe it's called, by a mechanic, which was quite a long job and a bit of a costly bill.

I went to pick the car up earlier and as soon as I started it up, the car was shaking back and forth as I was sitting in park. I immediately got out and went and told the mechanic. He looked under the hood, and the engine was very clearly shaking back and forth.

He couldn't give me an explanation as to why it would be shaking like this - and it wasn't doing it before I brought it in to have the waterpump changed.

It's the weekend now and he's closed on the weekend, but he said to just drive it for a couple days to see if it evens itself out.

I'm wondering if anyone knows what would be causing this and if there's any issues that could have occurred when he was replacing the waterpump that could cause the engine to do this?

Thank you for any assistance.

 

[melsg5]

Do you have a check engine light on? As you already know it's related to something the mechanic did or didnt do and he has to determine what it is that he overlooked.

 

[Static Sloth]

No, the check engine light is not on.

I will speak with him more as soon as possible. However, in the meantime, are there things you can think of that are commonly overlooked for a repair like this that would cause this problem?

Thank you.