There was a discussion here a while back about these engines having issues and causing failures around the 75-80k mile mark. Anyone remember this?

It’s inherent in the design across the board be it GM, Chrysler, Honda, etc.
The best thing you can do is disable it as soon as possible if you have to purchase and engine with that nonsense.
Once it becomes an issue you are pretty much past the point of no return.

quote:

Originally posted by Black92LX:
It’s inherent in the design across the board be it GM, Chrysler, Honda, etc.
The best thing you can do is disable it as soon as possible if you have to purchase and engine with that nonsense.
Once it becomes an issue you are pretty much past the point of no return.

Disabling it doesn’t do much, at least on GM V8s. The bad lifters still fail. Only real remedy is a new cam and lifters which is expensive.

I’ve heard the Hemi killer isn’t so much the cylinder shutdown system but a bad oiling system that with lots of idling time will wipe out the #7 lifters which in turn eat a cam lobe.

A Hemi with a CDA is a disaster waiting to happen.
As noted they already have an oiling issue, adding that nonsense is just a stake through it's heart.

Decent video on a Honda teardown with it.

I believe the Hellcat oil pump is supposed to help the oil pressure issues.

Thread was mine. $6k engine rebuild. The eco crap they put in the engines does it no favors, but the oil pump is wildly underpowered for the 5.7 Hemi in the Ram 1500. High idle hours with low oil pressure causes the lifters to stick, which eats the cam shaft. Headers also apparently like to go in these engines.

OEM Hellcat oil pump is the fix. I had about 13 pounds of oil pressure before the rebuild. With the Hellcat pump, I have 30-40lbs at idle and upwards of 80 when I stomp on it. The mechanic who did my truck has one also, and he says he was getting around 8lbs in his and asked Chrysler about it. Chrysler said it was fine ( ). He told me after doing mine, he had already ordered a Hellcat oil pump for his and was going to do it over the weekend. He couldn't stop raving about how big an improvement it was.

I've done a lot more reading up and looking into it. Basically, you cannot drive these trucks the way we're all taught to drive a truck - slowly coming up to speed. That sort of driving does the Hemi no favors. It wants to eat, you gotta feed it, as they say. I've found I'm actually getting better mileage around town since I adopted a fast acceleration and cruising once I'm up to speed style of driving. It's also a little more fun.

quote:

Originally posted by P220 Smudge:
I've done a lot more reading up and looking into it. Basically, you cannot drive these trucks the way we're all taught to drive a truck - slowly coming up to speed. That sort of driving does the Hemi no favors. It wants to eat, you gotta feed it, as they say. I've found I'm actually getting better mileage around town since I adopted a fast acceleration and cruising once I'm up to speed style of driving. It's also a little more fun.

It's basically the same with the modern turbo engines: Ride the near instant torque to the speed limit and coast. It keeps boost down, improves fuel economy, and you still have that reserve power waiting when you need it.

They (or some, anyway) may have fixed the oil pump issue. My `22 Ram 1500 5.7 shows about 47 pounds oil pressure at idle.