Review on 🔧 MITZONE Upgraded Yellow Aluminum Valve Covers (Front & Rear), Compatible with 2002-2009 Nissan Altima Maxima Murano Quest Infiniti i35 VQ35DE 3.5L… by Jeff Wells

Covers generally look good. One thing that worries me is that the plastic shields inside are held in place by self-tapping screws. There is no thread sealant or other way to keep them from falling out and falling into the engine. I drilled and tapped them for 10-32 pan head screws which I install with Loctite. Another big issue is that the right side cover, which is without a filler cap, has extra material that will break your head and allow broken material to fall back into the engine. You can see in the photos the area you need to unload so you don't damage the area where the gasket seals. This happened to me on one of our $25,000 race engines. As I tightened the screws holding the cover in place, I heard a noise. I removed the cap and found that the aluminum area where the caps seal over the cams was broken. In the end, the broken part was discovered after removing the timing cover and oil pan. A few minutes of work with an angle grinder will save you a lot of nerves and money.