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- Oct 19, 2025
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That l am aware of...
Cylinder Deactivation Delete/Disable
- Thread starter amateurbob
- Start date
OVERKILL
$100 Site Donor 2021
MDS isn't related to the lifter failure on the HEMI, it was a materials issue with the lifters which was mostly solved ~2018 with the updated German lifters.
Then you will pay. Even for used-unless you find a seller who is generous. There is plenty of competition in Toyota's vehicle segments-save for sedans. So I assume-you just want to buy a Toyota.
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Not at all. I actually enjoy finding diamonds in the rough but l also don't know everything. I know Toyotas 3.5 does not have cylinder deactivation yet and their hybrids are second to none. I seen multiple 3.5l engines and hybrids over 300k. I am very open to vehicles that have a proven longevity history.
Do you have any recommendations?
I don't buy very used vehicles-nor do I keep them that long generally. There are guys on here far better than me to answer your question(s).
Even then, as you’ve also stated, you can get to high mileage before a failure. ~200k
I’ve seen a few early 4th gens with over 200k, all original. (I know these people)
They’re all trucks that are always going and working.
SammyChevelleTypeS3
$50 site donor 2023
Old Man Boomer Rant #869: It is unfortunate but is a reality that almost all companies these days are going down the same path.
Buying what turns out to be poor to very bad parts - cheap made from all of the countries who have thrown up manufacturing plants all across the globe the last 25 years. In that time, there is barely any manufacturer products that can still live up to the quality they once had. It is truly sad but very TRUE. All one has to do is think about the outcome and the reliability (lack of) we are seeing from nearly every new appliances or major purchases one once could count on to last many years with trouble free use. How many times have new cars & trucks lately been found to have issues that end up not being a design or build problem but found to be a failure of a cheap - easily breaking part they used? Plus I am sure many did not plan it that way and bought what they deemed to be a good quality product to use.
We just did a re-wire and all breaker panels in the house about a year ago. My friend - who has been running his own electrical company over 35 years showed me something. He told me he was sorry to show me. All of the old breakers looked rock solid after over 50 years and said Made In USA. All of the new Made In China felt like they could break or fall apart in one's hands compared to what we replaced.
Chad told me , "Sam, for the past 20 years or more, every time I place orders for re-supply, even from the most expensive and reputable supply companies , the outcome is always the same." "The parts look cheaper and cheaper while the costs keep going up."
Buying what turns out to be poor to very bad parts - cheap made from all of the countries who have thrown up manufacturing plants all across the globe the last 25 years. In that time, there is barely any manufacturer products that can still live up to the quality they once had. It is truly sad but very TRUE. All one has to do is think about the outcome and the reliability (lack of) we are seeing from nearly every new appliances or major purchases one once could count on to last many years with trouble free use. How many times have new cars & trucks lately been found to have issues that end up not being a design or build problem but found to be a failure of a cheap - easily breaking part they used? Plus I am sure many did not plan it that way and bought what they deemed to be a good quality product to use.
We just did a re-wire and all breaker panels in the house about a year ago. My friend - who has been running his own electrical company over 35 years showed me something. He told me he was sorry to show me. All of the old breakers looked rock solid after over 50 years and said Made In USA. All of the new Made In China felt like they could break or fall apart in one's hands compared to what we replaced.
Chad told me , "Sam, for the past 20 years or more, every time I place orders for re-supply, even from the most expensive and reputable supply companies , the outcome is always the same." "The parts look cheaper and cheaper while the costs keep going up."
OVERKILL
$100 Site Donor 2021
Yep, we had a whole fleet of peak lifter failure year trucks (2011/2012) and they all went 200,000 miles before eating a lifter.
At 12,000 a year, you will hit 300,000 in 25 years.
As someone who still owns a vehicle with 420,000 miles on it - all mine except the last 25K which were my daughter who still lives here - I will likely never get there again.
I would honestly say transmissions are you most likely weak link at this point. All brands seem to have some issues.
As someone who still owns a vehicle with 420,000 miles on it - all mine except the last 25K which were my daughter who still lives here - I will likely never get there again.
I would honestly say transmissions are you most likely weak link at this point. All brands seem to have some issues.
- Joined
- Feb 6, 2025
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Do the Chevy trucks have variable valve timing in addition to multi-cylinder deactivation?
4wd
$50 site donor 2026
1. Preventing the thousands of actuations will minimize failures of both the VT and TC. Takes minutes - skill level of a teen.
2. A full delete will indeed outperform 1. but at ~7X the cost - and has zero effect if one decides to delete later on. It will be in the shop for a while - and hopefully it’s GMBoy or Clinebarger et al.
BTW: a number of failures are the non AFM lifters anyway …
It’s been fun revisiting GM small block V8’s - but the OP wants a Toyota - so I’m done here …
4wd
$50 site donor 2026
The front end will leave a RAM before the power train …
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How about we make an engine with the following:
1. Multi-Cylinder Deactivation by eliminating the use of some valve lifters at different times
2. Variable Valve Timing by using camshaft phasers
3. Direct Fuel Injection by keeping the intake valves dry all the time and no way to wash them off with fuel vapor
4. Dual Overhead Camshafts because one single camshaft is too simple
5. Start / Stop
6. Hybrid Part Time Electric Motor
1. Multi-Cylinder Deactivation by eliminating the use of some valve lifters at different times
2. Variable Valve Timing by using camshaft phasers
3. Direct Fuel Injection by keeping the intake valves dry all the time and no way to wash them off with fuel vapor
4. Dual Overhead Camshafts because one single camshaft is too simple
5. Start / Stop
6. Hybrid Part Time Electric Motor
Yes.
VVT is excellent for maximizing low end torque and high RPM HP.
VVT on LS/LT is not a problem. While a lot of folks delete it when doing a DOD delete and run a non-VVT cam, it’s really cool when VVT is kept and tuned appropriately.
4wd
$50 site donor 2026
Let’s meet at the CAFE and discuss - what’s the address ?
Using a scan tool, I've confirmed on my 2025 Pilot that using drive modes Sport or Tow prevents the VCM system from activating as well as disables auto start/stop. I believe the 2026 Pilot still uses the J35Y8 engine. Bonus (to me) that it's also naturally aspirated.
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- Oct 19, 2025
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Very good to know!
Here's a link to my post showing the graph when cylinders were being deactivated. I've done a lot more testing since then and feel pretty confident in what I said above is true. We're driving to Wisconsin next week, so will have plenty of time to mess with the scan tool when my wife is driving in regards to the VCM system and more.
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