[2016 Versa]

I'd wondered about the problems associated with direct injection and what effect it would have on the Versa in the coming years. Today I started doing a little research and found out the HR16DE has two injectors per cylinder and is both port and direct injection so we should have the best of both worlds. Thought there might be others here who have wondered about this so thought I'd post it for everyone's benefit. https://en.wikipedia.org/wiki/List_of_Nissan_engines

 

[Q Myers]

Actually the Versa HR16DE engine doesn't use direct injection. I uses one injector behind each intake valve, of which there are eight.

 

[PoMan]

2016 Versa, I don't think your info is correct. Like said, the HR16DE is not direct injected. The only DI engine that I am aware of in Nissan's lineup for the US is the VQ35DD used in 2017+ Pathfinder, Murano and Maxima and I believe the V8 in the Titan.

I own a 2019 Pathfinder with this engine. I wish it was both port and direct injected but it is only DI.

 

[amc49]

The D there stands for DOHC not direct injection, look at the VG examples given.

 

[2016 Versa]

I'm new to Nissan and not going to argue the issue. I didn't notice there were two "D" designations one for DOHC and the other for DI so everyone else is probably correct. I'm glad the engines are PI if they don't have both PI and DI. Maybe it'll keep the valves clean and be one less thing to worry about as the car ages.

 

[PoMan]

I'm new to Nissan and not going to argue the issue. I didn't notice there were two "D" designations one for DOHC and the other for DI so everyone else is probably correct. I'm glad the engines are PI if they don't have both PI and DI. Maybe it'll keep the valves clean and be one less thing to worry about as the car ages.

For sure port injection is the simpler and more desirable method for gasoline IMO. I didn't know our 2019 Pathfinder had DI until after I got it and discovered the high pressure cam driven pump up top in the engine bay covered in a thick foam rubber sound insulator. Loud little things. There's still a standard fuel pump/sending unit in the tank that feeds the high pressure pump. Too many parts!

 

[tutti57]

The Juke has DI and the system does have some drawbacks. I had an intake manifold off one with 11k miles and the valves were cakes with carbon. The 2019 Altima has it but they also use the additional injector setup to try to fix the known DI valve issue. I'm not aware of any US Versas that have it.

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[scarecrowdjinn]

Tutti57,

Is there any recommendations on how to prevent carbon build up for the DI's without additional injectors at the valves? Or is it just something that has to be physical cleaned as part of a yearly maintenance?

 

[tutti57]

None that I'm aware of, which is why they ended up adding that additional injection set up.

A lot of aftermarket sources recommend an induction service every 15k miles on GDI engines but I don't think it does anything. (I personally don't recommend any of that type of stuff, but some swear by it). That carbon is sooo hard. Some manufactures use media blasters to clean the valves. Some people spend hours with a pic. Some people install water/methenal injection kits, but I think I'd accept that it's the nature of the beast and if a drivability issue comes up because of it, I'd pay for some mechanical cleaning.

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[PoMan]

I wonder if these induction services or a DIY can of CRC intake valve cleaner might work or at least help if you started them at 15K miles and did one very 6-12 months afterwards.

I'm totally with you in that once a heavy build-up of carbon is present, no magical can-o-goodness is going to do anything. It's gotta be manually removed.

I guess if you do nothing, you wait for pinging or performance issues and do the spark plugs at the same time since the intake manifold has to come off.

 

[tutti57]

Maybe, but I'm not sure. I've never seen a good conclusive before and after at lower intervals.

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