These seals getting totally neglected. I consider the bottom one the "forgotten" seal on these engines. They can be very frustrating to change out if you don't know the right sequence. Kent includes free video instructions on how to remove the airflow sensor housing and the lower intake elbow so these can be replaced. You will need to pay close attention to his tips to get it all back together correctly.
Product Details
RECOMMENDATION: If you are replacing these seals you have to remove the mass airflow sensor. This will give you open access to replacing the engine breather hoses. Check those hoses. If they are hard and brittle you should replace them. To purchase see related products below.
Related Products:
M112 V6 M113 V8 U.S ( Not AMG or Euro Spec ) Breather Hose Replacement Kit w/ Video Instructions
For most U.S. V6 and V8 engines from 1998 to 2006 with mass air flow sensor at the back center of the engine.
WILL NOT FIT AMG ENGINES.
1998 to 2013 V6 and V8 Air Induction and Fuel Injector Cleaning Kit
Why is this not regularly done? Why don't a lot of shops recommend it? The results can be dramatic with regard to engine smoothness, acceleration, and fuel economy. Watch the video below, and Kent will explain the kit contents in detail.