Kent, as well as others, have seen valve cover leaks return within a few years after resealing. Some feel this may be a design flaw, but I contend the job was never done right in the first place. Let Kent explain why the leaks come back... IMPORTANT NOTE: This complete kit also includes our breather cover reseal kit that you see in the related products below.
Product Details
1. This is what will cause the breather covers to leak prematurely: Improper cleaning as well as the use of inferior sealant.
2. This is what will cause the valve cover gaskets to leak prematurely: use of low-quality gaskets, improper use of "sealants," and incorrect torque settings and sequence.
WHY do it yourself: The level of cleaning and attention to detail required is not something most shops can deliver. If they did, people would not be willing the pay. When you see what is required (above) to do the job correctly, which is NOT difficult but can be time-consuming, I think you can understand why if you want it done correctly, you will need to do it yourself. Do not let a mechanic do this job for you unless you drill him on how he is going the thoroughly clean the mating surfaces.
This complete kit includes the following:
- Our complete breather cover reseal kit which includes proper sealant and stainless bolts ( see details below)
- Genuine Mercedes R and L valve cover gaskets (DO NOT use cheap aftermarket gaskets on these V8 engines)
- 2 on-demand videos - One for removing and replacing the coil packs - One for resealing both the valve covers and breather covers.
Unless the breather hoses on top of your engine have recently been replaced, they most likely will not survive trying to reuse them after replacing the covers. More often than not, they will be so hard they will have to be cut to remove them from your breather covers. See related products below to order.
Related Products:
1998 to 2006 V6 and V8 Engine Breather Cover Oil Leak Fix Kit
M112 V6 and M113 V8 Mass Airflow Sensor Intake Air Critical Seals
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.
M112 V6 M113 V8 How to Fix Common Valve Cover Oil Leaks - On Demand Video
WHY does Kent stress doing this yourself - because my shops do not take the time to thoroughly clean and prep the covers for the proper sealant, or they do not use the proper sealant or use quality gaskets, or torque the bolts properly.
M112 V6 M113 V8 Ignition Wire and/or Coil Pack Replacement - On Demand Video
In this 10-minute installation tip video, Kent will show you a few things you need to be careful about when either installing new coil packs or ignition wires in your 1998 to 2006 V8 or V6 engine.
M112 V6 Complete Breather and Valve Cover Oil Leak Repair Kit w/ Video Instructions.
Kent and others have seen valve cover leaks return within a few years after resealing. Some feel this may be a design flaw, but I contend the job was never done right in the first place. Let Kent explain why the leaks come back...
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.