I made the statement yesterday that DoD in the Gen IV LS engines was “bad”. I stand behind this statement but clarification is needed.
Most of the LS architecture engine family prior to Displacement on Demand had expected lifespans of about a quarter of a million miles (about 430,000 km). The problem is the components used to implement DoD are not as reliable as the rest of the engine and have the tendency to destroy the rest of the engine when they fail, at the worst, or simply render the engine inoperable at best.How to diagnose DoD problems, DISPLACEMENT ON DEMAND – DOD, Repair Cost and Return on Investment. Chevy Tahoe Collapsed Lifter and that was just the first two videos on the search results that extended for multiple pages.
So even if cam or lifter damage is present since I’m converting the engine to fixed displacement anyway, but I still want to retain the VVT, all I have to do is buy the DoD delete kit and new lifters (sold as LS7 lifters on Amazon and eBay) and a VVT compatible cam for a larger engine than I have and I have improved performance over stock at minimal costs. Basically since I have to buy the cam and lifters as part of the repair anyway, the costs of buying the delete kit are the only cost of the delete, but I have to have the engine in hand before I do this because some engines had DoD delete from the factory, and some didn’t have VVT even though they are Gen IV engines. I have to make sure I get VVT, but that is a simple visual inspection before purchase as even though it’s an internal engine part the control hydraulics are part of the timing cover and visible at a glance.
Now, on the other thing, I’m still having allergy problems. I was supposed to go get my toes done and hair cut, but my allergies just made me sleep later than usual. I woke up about 1530 instead of my “normal” 1400, and my mind never revved up to cruising RPM before the venues were closed for the day. I wasn’t fully functional until after 2000 which is about the closing time for the nail place, and 2 hours after the barbershop closes.
And to end the post here’s a link to a video of stupid fun My Best Burnout EVER Ended With a Huge Methanol Fire… *WAR BIRD Extra Spicy Edition* as you can see from the video the friction from the spinning tires has polished the surface to a high gloss. That’s amazing, concrete polished by spinning tires. AFAIK concrete polishing is usually done when slightly soggy.