Intake valve cleaning?
Thread Starter
Racer
Joined: May 2007
Posts: 274
Likes: 55
From: Northern Virginia
Intake valve cleaning?
Are Porsche engines with DFI prone to intake valve buildup? My 2015 Turbo has 80k miles and I imagine it's time to clean the intake valves. What's the best way to DIY this?
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From: Winston-Salem, NC
If you've been using "Top Tier" gas and have not subjected your Macan to an excessive amount of "stop-and-go" driving, I doubt you've got a problem. If gas mileage and performance haven't changed, that would tend to indicate that all's well.
Thread Starter
Racer
Joined: May 2007
Posts: 274
Likes: 55
From: Northern Virginia
With the DFI engines, the fuel doesn't flow over the intake valves. So the type of fuel makes no difference on how clean the intake valves are. My understanding is that it really comes down to engine design. I did some more research and it seems that the oil separators that are installed on the engine do a pretty good job of keeping oil out of the intake tract, so maybe it's not an issue? There were a couple reports of some folks on macanforum who took their intake manifold off for other reasons and did see build up.
Banned
Joined: Jan 2011
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From: West Coast
1. This tool:
https://www.034motorsport.com/audi-a...ning-tool.html
2. Harbor Freight for a media tank, compressor, shop vac. They do make an all in one unit that make for an easy job. I have everything separate as I already had a compressor and a shop vac. Jus picked up this little piggy and I was off to the races.
Media Blaster Tank
The one and done way:
Burning Brakes
Joined: Dec 2021
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There is probably some build-up, but unless you have cold-start issues, or discern a power decrease, you are fine.
Be glad you don't have the new Audi 3.0 or 2.9 V6 engine in your Macan, the engine needs to be removed (!!) to do in intake valve cleaning........
Be glad you don't have the new Audi 3.0 or 2.9 V6 engine in your Macan, the engine needs to be removed (!!) to do in intake valve cleaning........
Banned
Joined: Nov 2012
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From: Oak Creek WI
All DFI motors will have excessive carbon buildup... my '15 Panny Turbo had considerable buildup at just 52K miles. Also, the GDI (DFI) injectors get coked on the spray ends as well.
Once I cleaned the nasty intake valves and serviced the injectors, car is happy as can be.
Once I cleaned the nasty intake valves and serviced the injectors, car is happy as can be.
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Back of intake valves look like this:
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What brand of gasoline do you usually use?
Last edited by Carlo_Carrera; Jan 30, 2025 at 05:53 PM.
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