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Discussion Starter · #1 ·
This thought just occurred to me. Being a DI engine, has anybody had a chance to look at their Intake ports and find sludge formations?

I tried googling more about the new Volvo engines and didn't find much information on it.

Anybody got more information on the same? Do we already have catch-cans installed in our Volvos? Do we probably need one? Do we not need one?
 

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Excessive intake valve deposits haven't been reported on the drive-e engines and the PCV oil separator appears to do its job well. It's not worth the effort and potential side effects of installing a catch can.

If you're worried about it, use a low NOACK oil (Pennzoil Ultra, Amsoil, etc). The oils with lower NOACK volatility/impurities have been shown to produce less intake valve deposits.
 

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I've had plenty of Drive-E intakes off and the valves always look nasty. Haven't had a problem attributed to the valves yet though.
 

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Discussion Starter · #4 ·
Excessive intake valve deposits haven't been reported on the drive-e engines and the PCV oil separator appears to do its job well. It's not worth the effort and potential side effects of installing a catch can.

If you're worried about it, use a low NOACK oil (Pennzoil Ultra, Amsoil, etc). The oils with lower NOACK volatility/impurities have been shown to produce less intake valve deposits.
Thank you for your reply. Yes. Even I am surprised to see no mention of intake valve deposits on newer Volvo Engines, although it might be too soon for Volvo engines to show valve deposit issues. The only reason I'm worried about is the inherent issue with DI engines and intake valve deposits (sooner or later).

I do use Pennzoil Ultra platinum for my oil changes.

If not a catch-can, I am wondering if there's any way to periodically clean the intake valve without having to take the engine off or damaging the super/turbo charger. I plan to own my Volvo for a zillion miles (if possible) and the longevity of the drivetrain does worry me at times.
 

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Discussion Starter · #5 ·
I've had plenty of Drive-E intakes off and the valves always look nasty. Haven't had a problem attributed to the valves yet though.
Dang! DI! Thou art a Bi**h. I wish there is some way to have preventive maintenance done for valves without pulling anything out! Or maybe the catch-can idea sounds good after all.
 

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Thank you for your reply. Yes. Even I am surprised to see no mention of intake valve deposits on newer Volvo Engines, although it might be too soon for Volvo engines to show valve deposit issues. The only reason I'm worried about is the inherent issue with DI engines and intake valve deposits (sooner or later).

I do use Pennzoil Ultra platinum for my oil changes.

If not a catch-can, I am wondering if there's any way to periodically clean the intake valve without having to take the engine off or damaging the super/turbo charger. I plan to own my Volvo for a zillion miles (if possible) and the longevity of the drivetrain does worry me at times.
When I have time I was going to install a catch can. Volvo dealer said no problem with warranty unless you do something stupid and cause a problem.
Also looking at CRC intake valve cleaner.
 

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Thank you for posting your concerns with DI engines and the issue of intake valve deposits inherent to DI engines. Asking around about these engines that have been used for several years by Volvo I don't find people speaking of issues related to service or warranty service issues. Unlike the problems with Volkswagen's that are easy to find on the net. I wonder if the super charger in the t6 version helps burn fuel cleaner. A local sales guy said he know of know issue with the Drive-E engines during the last few years. I have read the catch can is helpful. Hope they come us with ways to prevent this service issue. Nice engines, but it appears that only Toyota has come up with an engineered solution.
 

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Thank you for posting your concerns with DI engines and the issue of intake valve deposits inherent to DI engines. Asking around about these engines that have been used for several years by Volvo I don't find people speaking of issues related to service or warranty service issues. Unlike the problems with Volkswagen's that are easy to find on the net. I wonder if the super charger in the t6 version helps burn fuel cleaner. A local sales guy said he know of know issue with the Drive-E engines during the last few years. I have read the catch can is helpful. Hope they come us with ways to prevent this service issue. Nice engines, but it appears that only Toyota has come up with an engineered solution.

Oh, sweet, sweet irony.
 

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Drive-E Engines use the Evaporative Purge System to help keep valve deposits to a minimum. I've pulled plenty of intakes and the intake valves do get some deposits but nothing at all like I've seen on other brands such as BMW, Mini. I've seen BMW N54 engine intake ports almost completely blocked up where even a pencil would not make it past the intake passage. BMW also has known valve seal issues which also cause even more buildup of carbon. 2018 Drive E has a updated Purge System that should help even more.
 

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I use Techron direct-injection cleaner every 5,000 miles plus Techron fuel-injection system cleaner every 10,000. And Tier One gas. Yes, I know that Volvo says to not use any fuel additive, but I think that's more a matter of their not being able to test and verify every mouse milk on the market, so it's easier just to blanket prohibit them all. And what Techron uses in its cleaners is already in the high-quality gas you burn (assuming that's what you buy).
 

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Any drive-e with 40k miles or more has severe sludge on the valves. So much so that we ran a BG induction cleaner and then a wire brush on a drill to clean my co-workers engine out. He said the start/stop operated smoother and vehicle ran a ton better after doing so.

IF i end up keeping a Volvo for more than 2 years/15k miles, I would do the same exact thing.
 

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Discussion Starter · #12 ·
When I have time I was going to install a catch can. Volvo dealer said no problem with warranty unless you do something stupid and cause a problem.
Also looking at CRC intake valve cleaner.
I do look forward to a DIY thread if you end up doing it yourself. I'll most probably have the same installed soon.

Drive-E Engines use the Evaporative Purge System to help keep valve deposits to a minimum. I've pulled plenty of intakes and the intake valves do get some deposits but nothing at all like I've seen on other brands such as BMW, Mini. I've seen BMW N54 engine intake ports almost completely blocked up where even a pencil would not make it past the intake passage. BMW also has known valve seal issues which also cause even more buildup of carbon. 2018 Drive E has a updated Purge System that should help even more.
Yes. I've heard horror stories about ze german DI engines choking up the intake. But that does not help our cause. Any Vehicle with DI will more or less end up with intake valve issues no matter how efficient the system it. It's the nature of the beast. Unless you add a port injection and/or use cleaners to flush out the crud from the intake, it will happen, sooner or later. Maybe much much later than the german DI engines, but it will, none the less. And that's what gets me worried.

I use Techron direct-injection cleaner every 5,000 miles plus Techron fuel-injection system cleaner every 10,000. And Tier One gas. Yes, I know that Volvo says to not use any fuel additive, but I think that's more a matter of their not being able to test and verify every mouse milk on the market, so it's easier just to blanket prohibit them all. And what Techron uses in its cleaners is already in the high-quality gas you burn (assuming that's what you buy).
Yes, Sir. I only use 93 Oct fuel in my Vehicle. Thank you for the Techron suggestion. I'll surely do some more looking around on it and end up probably using it.

Any drive-e with 40k miles or more has severe sludge on the valves. So much so that we ran a BG induction cleaner and then a wire brush on a drill to clean my co-workers engine out. He said the start/stop operated smoother and vehicle ran a ton better after doing so.

IF i end up keeping a Volvo for more than 2 years/15k miles, I would do the same exact thing.
I am already at 33-33.5k miles on my 11-month old V90CC and this is exactly what I'm worried about. I'll look into the induction cleaner and I hope I end up finding something which is more hands-on and doesn't require me to take my Vehicle to the shop every time I need to do my preventive maintenance. Thank you for the suggestion. I'll also ask around my local dealership if they have any periodic cleaning programs that don't cost an arm-and-leg.
 

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It's not worth the effort and potential side effects of installing a catch can.
I had a catch can in my N54 BMW (infamous for carbon build up) for 40k miles and only got benefits from using it. This is the first time I hear about side effects or disadvantages or putting a catch can. Can you share what those side effects are?
 

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I'm confused by the people saying they use various cleaner/additives to deal with build-up on the valves. It's direct injection, so your additive, along with the fuel, is being injected directly into the combustion chamber and is never hitting the valves in the first place.

Am I missing something?

I'd also be cautious on changing up your oil, for oils that are low in zinc and phosphorous. You need those for the health and longevity of the turbo.
 

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Discussion Starter · #15 ·
I'm confused by the people saying they use various cleaner/additives to deal with build-up on the valves. It's direct injection, so your additive, along with the fuel, is being injected directly into the combustion chamber and is never hitting the valves in the first place.

Am I missing something?

I'd also be cautious on changing up your oil, for oils that are low in zinc and phosphorous. You need those for the health and longevity of the turbo.
Yes. You're right. Additives put into the Gas tank are useless to clean up your Intake in case of DI. The CRC spray mentioned here is for spraying directly into the air intake path. Behind the MAF and before the Throttle body. That does help breakdown build-up.
 

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I use Techron direct-injection cleaner every 5,000 miles plus Techron fuel-injection system cleaner every 10,000. And Tier One gas. Yes, I know that Volvo says to not use any fuel additive, but I think that's more a matter of their not being able to test and verify every mouse milk on the market, so it's easier just to blanket prohibit them all. And what Techron uses in its cleaners is already in the high-quality gas you burn (assuming that's what you buy).
How does Techron clean the valves?? Fuel injectors yes, valves??
 

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I'm mainly concerned with keeping the injectors clean and spraying properly. Dirty valve backsides, not so much.
But the injector isn't going to get any dirtier because it's DI. The backsides of the valves do. That matters because it can eventually impact their ability to properly close and give proper compression.
 

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How does Techron clean the valves?? Fuel injectors yes, valves??
The ridiculously high pressure those injectors shoot out stops them from getting clogged. I have yet to see that happen.
 

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The injectors don't need to be cleaned, nor will it reduce carbon build-up on valves, so you're wasting your money on Techron. Any benefit you feel is placebo.

A high quality catch-can (one that actually has sufficient baffling) can help a little.

After a valve cleaning, a water injection system can help prevent the build-up from reoccurring, but the real fix -and this was my comment earlier- is returning to port injection.
 
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