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Techron With GDI Engines Intake Vale Cleaning ? #5439049 05/26/20 06:58 AM
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ChrisD46 Offline OP
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In most cases Techron gas additive doesn't do much for cleaning GDI engine intake valves because the mixture never reaches the Intake Valves ... *Now I read where just for an instant Hyundai / Kia GDI engines provide a brief "squirt" of gas to the intake vales of their GDI engines at start up so there is a chance some Intake Valve Cleaning cleaning may now be going on ?


'17 Hyundai Sonata 2.4L GDI 5W30 PUP / Fram Ultra #9688
'10 Hyundai Elantra 2.0L 5W30 (50%) / 5W20 (50%) QSUD / Fram Ultra #9688
'07 Kia Sedona 3.8L 5W30 Castrol EP / Fram Ultra #9999
Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439062 05/26/20 07:14 AM
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BMWTurboDzl Offline
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I've read that some automakers add an additional pulse of fuel while delaying the closing of the intake port as away to get some fuel mist to wash over the immediate back side of the valves.


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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439094 05/26/20 07:55 AM
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LotI Offline
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Theoretically, fuel could come in contact with the intake valve if the engine is in Atkinson or Miller cycle operation.

The intake valve in these engines is left open longer than Otto cycle to improve efficiency. Less compression stroke, longer expansion. It would also require fuel to be injected early in the compression stroke so vapor could exit the combustion chamber. The charge in a DI engine is not homogeneous so that’s an obstacle

Theoretically!


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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439130 05/26/20 08:53 AM
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ARCOgraphite Offline
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Given typical intake lobe centerlines on any particular engine cam phasing,

There would be absolutely no technical barrier to add a "cleaning cycle" to inject fuel when the valves is fully open.

But you would loose the D.I. benefit of Late -cycle injection and charge cooling and densification.

and - there is a high velocity intake charge washing over the valve.

This may ;lead to hard knock if done under load when fully warmed.

I Would say that a GDI 2000+ psi is a pretty healthy "power washer", but surely not enough volume of fuel is
injected to have high energy droplet impingement on the valve head. I will wet it if for a few milliseconds.

- Ken


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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439157 05/26/20 09:30 AM
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UncleDave Offline
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Originally Posted by ChrisD46
In most cases Techron gas additive doesn't do much for cleaning GDI engine intake valves because the mixture never reaches the Intake Valves ... *Now I read where just for an instant Hyundai / Kia GDI engines provide a brief "squirt" of gas to the intake vales of their GDI engines at start up so there is a chance some Intake Valve Cleaning cleaning may now be going on ?


Honda placed a multi pattern injector behind the intake valve to do just that.

UD


Uncle Dave
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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439166 05/26/20 09:40 AM
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ARCOgraphite Offline
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I only have my Jetta as a lease vehicle for two years, so its back to VW ( if they are still in business in the US)

in 7 months. I would guess the turbo helps in minimising intake reversion and valve coking due to the positive pressure in the valve bowl when the the intake is on the opening ramp at say 10 degrees BTDC


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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439254 05/26/20 11:25 AM
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Kawiguy454 Offline
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Ive had injectors get weird twice on late model gm truck. I'm hoping regular usage of PEA helps the injectors stay clean as the impact on performance is yuuuge in caparison to valve deposits. For valve deposits i invested in a good catch can. I have heard that ford avoids the problem with phasing and fuel reversion onto the open valves. ...sounds like balancing a stack of dominoes to the moon though.

Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439263 05/26/20 11:33 AM
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UG_Passat Offline
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Keep the injectors clean, so that the fuel atomizes properly when sprayed, which leads to a more complete combustion with less particulate matter formation.


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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5439388 05/26/20 01:55 PM
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pbm Offline
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There are several IVD cleaners on the market that work by introducing them into a vacuum port or directly into the intake while keeping the
RPM's up (but not over 3000RPM)...CRC, STP, Berryman etc....make them. I'm wondering if using Regane or Techron (or anything with PEA)
would work by directly misting it into the intake while the engine is running (a low dose mist to avoid hydrolock). It would be cheaper than
the kits. Thoughts?


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Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: pbm] #5443534 05/31/20 08:35 PM
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buddylpal Offline
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Originally Posted by pbm
There are several IVD cleaners on the market that work by introducing them into a vacuum port or directly into the intake while keeping the
RPM's up (but not over 3000RPM)...CRC, STP, Berryman etc....make them. I'm wondering if using Regane or Techron (or anything with PEA)
would work by directly misting it into the intake while the engine is running (a low dose mist to avoid hydrolock). It would be cheaper than
the kits. Thoughts?


Try it and let us know the results.

Re: Techron With GDI Engines Intake Vale Cleaning ? [Re: ChrisD46] #5445744 06/03/20 09:03 PM
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nicholas Offline
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Crc works amazingly well.
I use it every 6 months.
We do lots of low kms city driving.


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