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Between that and a timing chain it's a pretty proven platform. Not the most powerful engine out there but more than enough to get you in trouble. Seems like there isn't much you can do to it in terms of performance aside from an exhaust. Anything else you're better off with a different car or a GSF. Put it in Sport+ mode and enjoy it for what it is! A dependable well handling sports sedan.
I am glad our engines reduce carbon build up via the working of the port injectors. There will still be oil blow by, given not as much since its not forced induction. I wouldn’t want the oil reburned, snake oil or otherwise haha
I installed one in my 2011 Nissan Frontier 4.0 V6, it made a difference and collected 1/3 quart every 7500 miles. The engine ran smoother and a high temp ping it had during summer is gone, truck had ~70k miles when I installed and roughly ~130k now.
If one is trying to avoid carbon build up perhaps using only Top Tier gasoline would be a good idea. An independent lab AAA hired showed it really works. https://gasprices.aaa.com/fuel-quality/
That's not applicable to the carbon coking on DI engines that we're talking about here. The fuel never gets to hit the back of the valves so even the most detergent laden fuel won't help.
That's not applicable to the carbon coking on DI engines that we're talking about here. The fuel never gets to hit the back of the valves so even the most detergent laden fuel won't help.
FINALLY someone who gets it! The coking happens at the BACK of the valves. I'm sure lexus did their absolute best after the 3gs issues, but if i can prevent oil from getting into my combustion chamber i will. To OP who installed a oil can let me know if anything is caught . To the rest of the keyboard warriors who do not have one, dont care or think it's bunk , (which it could be) shut up and leave please. No one cares about your opinion. Here's you non-PC moment for the day.
FINALLY someone who gets it! The coking happens at the BACK of the valves. I'm sure lexus did their absolute best after the 3gs issues, but if i can prevent oil from getting into my combustion chamber i will. To OP who installed a oil can let me know if anything is caught . To the rest of the keyboard warriors who do not have one, dont care or think it's bunk , (which it could be) shut up and leave please. No one cares about your opinion. Here's you non-PC moment for the day.
To be fair, all the 4GS with the 3.5L V6 engines do spray fuel on the back of the valves. It's the special perk of Lexus's dual-injection system.
From what I hear though, certain driving patterns doesn't engage the port injection often enough to fully prevent the carbon coking but it generally works very well and some newer DI engines from other manufacturers do the same thing now.
To be fair, all the 4GS with the 3.5L V6 engines do spray fuel on the back of the valves. It's the special perk of Lexus's dual-injection system.
From what I hear though, certain driving patterns doesn't engage the port injection often enough to fully prevent the carbon coking but it generally works very well and some newer DI engines from other manufacturers do the same thing now.
So if you drive slow like my other half and never go about 3k in eco mode, you might get coking?
So if you drive slow like my other half and never go about 3k in eco mode, you might get coking?
No, not really. The Toyota system uses both port and direction at low load and low RPMs.
The ultimate strategy is combining both PI and DI benefits, using each to diminish the other’s negatives. Toyota, for example, fires both injectors during low to medium load and rpm conditions—in other words, during normal driving.
And as noted up-thread, the 2GR-FKS (GS350, 2016 and on) has a self cleaning cycle.
“When you go into a hot-idle situation, the system is going to look at the time that it ran, the number of cycles the injectors went through, the temperature of the injectors and then it goes into a self-cleaning mode,” Sweers says. “Because we have the port injection, I can continue idling the engine without having any side effects.”
06-07-19, 12:45 PM
