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I am in the car purchasing mode but not happy with the changes in engine technology. I'm not happy about the turbo trend but I could live with that. What I really dont like is the direct injection. From what I've read, the engines tend to develop carbon build up on the intake valves and there is no way to remove it. Then the owner is stuck replacing the heads. Have I got the story about right?
You can clean the engine with various foams and walnut blast method but it is pain. The biggest downside to manufacturer's going DI to meet CAFE is that exhaust from DI is too small for human body to filter out and it lands in our lungs. Good for environment via more MPG, but terrible for our bodies.
You can clean the engine with various foams and walnut blast method but it is pain. The biggest downside to manufacturer's going DI to meet CAFE is that exhaust from DI is too small for human body to filter out and it lands in our lungs. Good for environment via more MPG, but terrible for our bodies.
I have a GDI you put in Direct Fuel Injector Cleaner into the gas tank every 5,000 miles or use top tier gas. Most manufacturers are going to GDI. My 2016 Kia Sorento has never had a problem and it’s covered by a 100,000 mile warranty, just do the maintenance that’s specified in the owners manual.
You can clean the engine with various foams and walnut blast method but it is pain. The biggest downside to manufacturer's going DI to meet CAFE is that exhaust from DI is too small for human body to filter out and it lands in our lungs. Good for environment via more MPG, but terrible for our bodies.
Walnut blasting involves removing the intake manifold and your average driver isn’t going to do that. GDI engine gets better MPG also.
I have a GDI you put in Direct Fuel Injector Cleaner into the gas tank every 5,000 miles or use top tier gas. Most manufacturers are going to GDI. My 2016 Kia Sorento has never had a problem and it’s covered by a 100,000 mile warranty, just do the maintenance that’s specified in the owners manual.
The way GDI work, anything you put in your gas tank won't clean anything. If it did, you wouldn't have any issues to begin with. Cleaners that clean GDI engines go in from under the hood of the car.
Some recommend using 'CRC 05319 GDI IVD Intake Valve & Turbo Cleaner' every 10 - 20K.
That or Seafoam.
Generally you can squeeze the straw in just past the MAF sensor and spray away.
Might work, might not if there's too much crud built up. That said this is something diesels have experienced since they were diesels. Don't see folks crying into their beer about dirty intake valves of diesels.
The way GDI work, anything you put in your gas tank won't clean anything. If it did, you wouldn't have any issues to begin with. Cleaners that clean GDI engines go in from under the hood of the car.
I have to laugh at the way Hyundai recommends that. It may keep the injectors themselves clean, but it doesn’t even touch the valves.
Toyota has both direct and port injectors in their new turbo engines and surely enough, they start showing signs of build up after 70K miles. We already have reports of that in Club Lexus.
Honda does nothing. Ridgeline had DI engine for years and thousands of miles and I have not noticed much gripe about it in Ridgeline Owners Club.
Germans had DI engines about the longest of them all and they are known to have problem with carbon build up.
Walnut shell blasting is beyond average DIY guy and is roughly $600. Dealer. As dealer said "oh, build up is not a problem, you just come here and we blast them valves". Of course....
Thing is, no one really asks buyer if they want DI. You want more power, better mpg - you get DI engine. Period. You are Ok with lower mpg, still decent power - you buy old school V6 or V8 and enjoy the car.
It's you call.
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