I replaced my injectors on my 300sd, and noticed that after washing the engine, there are little bubbles around the injectors.

When I ordered the injectors, they told me I would have to order heat shields, and that I needed 10mm ones. When I got the parts, the injectors came with them. The ones that came out of the car had a smaller inside hole than the new ones. Would this cause any issue?

Any ideas? Is this common. I tried to clean the holes in the head, and torqued them down to 55ft lbs.

Thanks.