Car noise from underneath , is it my fuel pump or cat? Just had some major engine work done, so sad

Maintenance/Repairs
1

I just got my car back I had some major engine work done, gaskets and remachined a couple heads + some other stuff, ~$2000 worth & I have had the car for about an entire week and now it is making some horrible noise from the underneath I am guessing exhaust system.

I have not taken it back to the engine shop b/c it just started yesterday and they far away and not open until Tuesday. I put a video on youtube and someone told me it sounds like my fuel pump. I will upload here for you to look at. I have had fuel pump failure before and I never heard a noise like this.

I suspect another costly repair of a failed component but I am debating if I should go somewhere else today to get it diagnosed then go back to the first place that I just spent all the money are or what. I don’t know what to do but have you seen the old poster that says “hit any key to continue” and the guy is standing there about to take a sledgehammer to his computer. I feel a little like that and also very sad about this situation.

Here is a video of the current noise: http://youtu.be/LB2rUimZXvg

Here is a video of my post engine repair you can see all the gasket sealer that was used: http://youtu.be/CgHyW1f-Wcw

2

Sorry, but I couldn’t make out anything from the audio. Just a lot of noise and no idea how it differs from “normal” sounds the car makes. Maybe someone else can help. What is the year, model, and motor in the car?

3

Ah its ok I dont think I was imaging the noise based on what I am used to hearing but it did not do it today when I was driving so I will keep an eye on it and if it gets worse or returns I will go back to the engine shop. It is a Pontiac Grand AM GT 3.4L & it seems to be running great now except my engine temp is a little fluctuating. It holds 200 then after 15-20 mins of driving it is goes up between 210-230 but it does not seem to go higher than that.

I am not using dexcool coolant though I am using the cheap brown watery looking stuff the shop put in that is generic for all cars, do you think that matters really?