Just got my engine swapped, runs fine for a week,now I start to hear some knocking and rattles from engine, I got some leaks as well, got it re sealed for engine oil pan but took it to the dealer and couldn't locate the actual leak and mentioned it was engine oil but no solution. For the sound they said it was coming from the back of the engine, they used the noise detector ear thing. Anyway, I've been getting some grinding noise once in a while also, mostly from letting off the gas pedal or coming to a stop. I'm getting no engine lights or anythings and power is still at full throttle when I hit it. No burning smell or any smell at all.

Any ideas?

I placed white paper towel under the engine and got 2 colors.

 

For this, have a look at your ABS pump. The symptoms you described are indicating that it will fail soon.

Sorry I couldn't help out on your other issues.

 

Sounds like a failed water pump noise but then I just got it replaced a few days ago and with a new drive belt and pulley as well. But the sound is very similar.

 

Oh man, my car shook so hard I swear it was gonna blow up (I'm not even exaggerating). It was loud as hell and people on the sidewalks even saw my car shake and of course check hybrid lights and stuff came on.