Replacing the valve cover with a new one was expected, not only a better look but also a better seal. When we completed the installation, it was disappointing that it actually leaked oil. The first thought was is there something wrong with this new engine valve cover. But after re-examining it for a while, it became clear that what looked like a very easy installation step actually had a lot of little problems in the installation. Next we step by step to troubleshoot the problem:
Clean Up Old Gaskets and Silicone
One of the main reasons the bonnet still leaks after a gasket change is because it was not completely cleaned of the old gasket and silicone residue. The residue of the old gasket and silicone will leave an uneven part of the bonnet, which will cause the new gasket to not fit completely on the surface of the bonnet, thus triggering a seal failure.
Therefore, it is critical to ensure that the old gasket and silicone are completely removed from the bonnet and cylinder head.
When removing old gaskets, it is recommended to use a scraper or a plastic cleaning brush. Never use a wire brush to clean the surface of the cylinder head, as the wire brush will scratch the metal surface, which will easily affect the sealing.
Preventing Gasket Shift
Gasket displacement is one of the common causes of oil leakage even after replacing the bonnet gasket. During installation, if the new gasket is not secured properly, it may shift when the bolts are installed, resulting in a poor seal.
To prevent this, a moderate amount of silicone can be applied to help hold the new gasket in place while it is being installed. It is best to apply the silicone in several of the locations labeled below the diagram:
Tighten bolts properly
Using the wrong tool or tightening method can cause the bonnet seal to fail. Impact wrenches can cause uneven force on the bolts and may even damage the cylinder head or bonnet. So don't use an impact to tighten bolts, but it can be used to start bolts in place.
The way to do it right is to use a torque wrench and tighten the bolts according to the manufacturer's specifications and sequence.
In general, tighten the bolts progressively in a “center out” sequence, or progressively in a diagonal (symmetrical) sequence to ensure an even seal.
Attention to bolt details
Bolt details should be noticed in the installation of the 2007 Dodge Ram 1500 valve covers. After applying the silicone, wait for it to initially cure before tightening the bolts to ensure the best possible seal.
At the same time, it is important to ensure that the bolts used are of the correct length and that the threads are intact. If the bolts are too long or broken, there will be no clamping force between the two.
Another point to keep in mind, do not pinch the harness during installation. If the harness gets pinched, it will leave a gap. Not only will this lead to oil leaks, but it could also damage the harness and affect the normal operation of the engine.
Avoiding Accidental Damage to the Bonnet and Proper Use of Silicone Gel
When replacing the bonnet gasket, improper handling may result in damage to the bonnet. For example, forcibly prying the bonnet without completely removing the bolts may deform or even crack the bonnet, which will eventually prevent it from sealing properly.
In addition, the amount of silicone used needs to be appropriate. Too much silicone may cause the gasket to fail to fit flat, or even squeeze into the engine interior, affecting the sealing effect.
The proper way to do this is to apply a thin layer of silicone to ensure that the new gasket is able to perform its proper sealing function.
If you find that all of the above minor problems are avoided, then the problem may not be in the valve cover.
Concerns about oil jugs and oil and gas management
If you have purchased an oil pot along with a valve cover, it is possible that due to the lack of functionality of the oil/gas separation, the gas coming out of the oil pot contains oil stains and leads to oil leaks.
SPELAB has found a solution to this problem and is working on a new, more efficient oil separator and an upgrade to the primary version of the bonnet. Stay tuned!
Author's Note
This is my summary of some common small problems about oil leaks, relatively low tech, even the first time diy friends can do it. But be sure to have patience. If you have any other questions, share them in the comments section and get better together!
