The so called "NOODLES" do work very well if you have a instruction sheet.

The idea is to install them with the seal retainer. The retainer should be clean and dry and the same goes for the side seals. Lubricate the side web of the block with oil on both sides and install with the retainer. The seals will grip the retainer and slide along the block surface as the retainer is placed in the block.

Here are some instructions. Never had a leak with these when installed properly.