2024 BMW 5 Series
#46
Lexus Test Driver
It's only been 4 years, but I haven't heard any horror stories about Ford's implementation yet, and there have been a LOT of Coyotes sold in that timeframe. Every GM variant--including DFM, the current iteration--was replete with failures within months of launch. It seems like Ford might have gotten it right.
It can always be coded out, is automatically coded out if you add a supercharger (which of course you should do. ), and disabled temporarily in either sport or tow/haul mode. Even when enabled, it only operates during high speed low-throttle cruising.
I don't know enough about CD in the B58 yet to have formed an opinion yet.
It can always be coded out, is automatically coded out if you add a supercharger (which of course you should do. ), and disabled temporarily in either sport or tow/haul mode. Even when enabled, it only operates during high speed low-throttle cruising.
I don't know enough about CD in the B58 yet to have formed an opinion yet.
Yeah so far it seems to be okay. I believe they have a different implementation than the GM and Dodge systems. What worries me is the change to a belt driven oil pump. Reading that that's an engine-out maintenance item.
#47
Super Moderator
Ford's system disables the rocker arms. Two rockers in each head have a "split" rocker arm where the fulcrum (the fixed connection to the head) is controlled by a solenoid. To deactivate a cylinder (it does all 4 at once like the old GM systems), oil pressure causes the piston of the solenoid to retract. So when the cam pushes on the rocker, the end that would normally be fixed is depressed instead of the side that actuates the valves. Release the pressure and the solenoid extends, restoring normal rocker operation.
You're looking at a >$1500 replacement cost either way, but <fingers crossed> it looks like failures may be less frequent with the belt-driven units, as well as being less catastrophic when they happen, as it doesn't result in shards of metal flowing through the oil passages. That's why nearly every Coyote build I've ever seen includes replacing the oil pump gears with billet units.
Last edited by geko29; 09-11-24 at 01:47 PM.
#48
Lexus Champion
Those belt drive pumps are hell. Massive regression in all the other engines so far, maybe the 5.0 will be spared but I'm not hopeful. It is ford after all lol!
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