SDPC Tech Tips: DOD/AFM Delete 101

hello everyone my name is Nick I work performance parts here at Scoggin deke and today we're going to discuss what is involved with deleting DoD out of your Jin 4 LS based v8 displacement on demand or active fuel management as it's also called it's actually a pretty simple system GM introduced it back in 2005 on the five threes that came in the trailblazer an envoy and then the front-wheel drive five threes that came in the Pontiac Grand Prix GX Pease what we're going to discuss today includes those applications as well as any gin four based v8 that uses the dod system while GM does still use displacement on demand and a very very similar system on the gin v LT based engines that you can find in the trucks the Camaros the Corvettes what we're going to discuss today we're going to keep it to each inform LS based of v8 now to describe how the system works when your engine computer senses low load cruising situations usually around town or on the highway it will deactivate four out of the eight cylinders in your engine essentially turning it into a v4 by cutting off fuel in spark but it also has to shut off the valves to those engines as well it does that through this valley cover here that kind of looks like a brain and inside of it are these four solenoids that shoot high volume high pressure oil into these eight ports you can see here in these circles through the block down into these lifters these are special lifters that when the high volume high pressure oil reaches them they actually collapse they still run along the camshaft but they do not actually the valves it's actually a pretty simple system works fairly well unfortunately with time with age that system that does tend to malfunction and gets the symptom that everybody seems to here is the ticking noise this thing will stay collapse it'll get stuck and you're hearing this tab against the camshaft so as with any engine malfunction it is best to address the situation as soon as possible unfortunately if this is ignored you can leads to further engine damage and in some extreme cases we've seen where it's led to complete engine replacement so let's stay away from that what you get in our kids is six team brainy lifters for new lifter guides you also get two head gaskets to exhaust manifold gaskets in a set of head bolts you do would need these parts cuz you have to remove the cylinder heads to get to these lifters when it comes to the dod manifold the valley cover there's a couple different ways you can delete that as well in our kids we offer of course the stock valley cover on non dod engines these use these o-rings to block off those ports but if you want to save a couple bucks another way to do it is to use these nifty bullet-shaped pieces of steel to tap into those ports on the block we offer it both ways to help you delete that system but we do get some pretty frequently asked questions with these kits and doing this kind of a job we kind of wanted to address some of those to help you guys out the first one is as people say well I'm doing a a D of D delete do I have to change my cam chef yes you absolutely have to you cannot use a DoD factory cam once you delete the system the reason we do not include a camshaft with our kids is every customer wants a different camshaft for their application we offer everything to be purchased on the side from a complete stock replacement camshaft some remorse all the way up to high performance camshafts if you have any questions of what you need it to fit your needs feel free to give us a call we're more than happy to help you out another question that we get is if I'm deleting Neo D do I have to delete V V T or variable valve timing no you do not they are completely separate systems even though they are both involving the valvetrain variable valve timing is actually a pretty good system it's proven to be relatively reliable and it helps you maintain low-end torque without sacrificing high end horsepower if you're using a stock camshaft or a model performance camshaft we recommend keeping it if you are going to a higher performance camshaft sometimes it's required to delete variable valve timing while deleting DoD we have all the parts in stock to help you with that when you call about your cam recommendation ask us about that as well we can provide those parts to you a third question that we get that's pretty common is if I'm replacing a live and replacing the cam chef don't have to replace pushrods Val Springs stuff like that no if you're using a stock replacement camshaft you actually don't have to replace those parts the push rods are the same regardless of which lifter you're using the same thing with the valve springs they will work as long as you're still using a stock replacement camshaft naturally miss you do a higher performance camshaft you are going to need higher performance push rods paul spaghetti different lengths you are going to need a stronger valve springs when you call us about a camera commendation we can also find what parts you're going to need to replace to match that new camshaft last question not as common but people do ask is the dod engines came with a higher volume oil pump to go with this system when I delete the system do I not have to change the oil pump no you do not actually that is perfectly fine in turn you get a higher volume or pump in your new slightly rebuilt engine we have this kit as well as many more parts on our website that is SD parts comm thank you for joining us today

Channel: Scoggin-Dickey Parts Center

Views: 344,294

Keywords: sdpc, scoggin, dickey, chevrolet, gm, ls, engine, dod, displacement, on, demand, delete, kit, about, faq, how-to, how, to, truck, silverado, gmc, sierra, lsx

Id: DNxBaSDD5q8

Length: 5min 33sec (333 seconds)

Published: Mon Mar 11 2019