Blow off valve

[SCMav22]

Apologies if this has been addressed already. I didn't see any threads that answered my questions.
I'm a newb to the Maverick AND turbos. I just bought a used 22 Mav (EB - 25k miles) and I was told that the PO may have installed a blow off valve. I have done some research about it and I understand what it's for and the noise it makes. My questions:
1. How does this engine/turbo come stock? Does it have a blowoff valve or something similar?
2. Is a recirculation valve a better upgrade and worth it?
3. What is important to know about maintenance for turbos?

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[Johnny0625]

Yes they come stock with a "diverter valve". The excess boost when letting off throttle is diverted back into intake before throttle body. The aftermarket ones vent that to atmosphere and give you the turbo "woosh". From what I've seen there's different variations being sold.
I personally don't care for any of that anymore and would put back stock if we're mine LOL

 

[Montana]

IMO, I've done the $5 mod from Panda Express or whatever it's called and it sounded wrong. Just so wrong. There is a HUGE difference between a blow off on a Supra/Skyline etc etc and this odd noise you hear coming from a Ford Maverick lol. It sounds like something is leaking air and not in a good way.

I'd just install the stock tube if I was you. Let us know if you decided to replace it and need a part number for the tube, assuming they did not throw it in the glove box or something. There is also a marketplace here you could easily sell it on, assuming it's an actual blow off valve and not just the cap and zip tie mod. Do you know where to look?

 

[SCMav22]

So what you seem to be saying @Johnny0625 and @Montana is that the stock setup is a recirculation tube and its better than the aftermarket valve I may have currently? I did not find the original part so how much would that tube cost me?

 

[Montana]

So what you seem to be saying @Johnny0625 and @Montana is that the stock setup is a recirculation tube and its better than the aftermarket valve I may have currently? I did not find the original part so how much would that tube cost me?

LX6Z9K308A is the part number for the tube and the wastegate actuator itself is CJ5Z9U465A

https://parts.ford.com/shop/en/us to have it shipped to your local spot and/or directly to you.

I don't know if I'd call the stock one better or worse? Maybe the best way to put it is "how the engineers intended it to be"

Maybe a pic of the one you have installed would help too. It's a very easy replacement. Just need to know exactly what you have on there currently.

 

[Dodeboost]

If you have the spacer type “Bov adaptor” all you need to do is remove it in order to return to stock. These are essentially an aluminum spacer that gets installed under the stock recirculation valve. If this is what you have, and you go back to stock you will likely need to source stock length bolts, as the aftermarket “Bov adaptors” require longer bolts.


stock bolts for recirculation valve

 

[Wetfoot77]

In answer to your query on turbo maintenance, oil changes are key. As you are already at 25k, plan on oil chnges every
5,000 miles, more often if you drive agressively or in very dusty conditions.

 

[BennyMav]

If you have the spacer type “Bov adaptor” all you need to do is remove it in order to return to stock. These are essentially an aluminum spacer that gets installed under the stock recirculation valve. If this is what you have, and you go back to stock you will likely need to source stock length bolts, as the aftermarket “Bov adaptors” require longer bolts.


stock bolts for recirculation valve

How do you go about removing the stock bolts?

 

[Dodeboost]

How do you go about removing the stock bolts?

e5 socket

 

[BlueSnake77]

In answer to your query on turbo maintenance, oil changes are key. As you are already at 25k, plan on oil chnges every
5,000 miles, more often if you drive agressively or in very dusty conditions.

I use a full synthetic oil and do changes every 4k. One important thing with a turbo engine which like 99% of owners probably never do is letting your turbo cool down after prolonged driving.

 

[BlueSnake77]

To be clear, when I said that probably 99% of people that own turbos don't let them cool down, I wasn't just referring to Maverick ecoboost owners but ALL owners of turbos of every make. Most vehicles made now come with turbos and many owners no nothing (or don;t care to) about how to maintain them properly.

 

[Master Blaster]

To be clear, when I said that probably 99% of people that own turbos don't let them cool down, I wasn't just referring to Maverick ecoboost owners but ALL owners of turbos of every make. Most vehicles made now come with turbos and many owners no nothing (or don;t care to) about how to maintain them properly.

I doubt that it would be necessary to wait for the turbo to cool down on the Maverick, seeing as the turbo is in the coolant path and is very effectively liquid-cooled. Perhaps you are thinking of some other engine where the air-cooled and red-hot or even straw-hot turbo cooks the oil sitting in it when you shut down.

 

[Chops]

I doubt that it would be necessary to wait for the turbo to cool down on the Maverick, seeing as the turbo is in the coolant path and is very effectively liquid-cooled. Perhaps you are thinking of some other engine where the air-cooled and red-hot or even straw-hot turbo cooks the oil sitting in it when you shut down.

Both coolant & oil stop circulating when engine turned off. To avoid “cooking” the oil in your shutdown turbo - let the engine idle for a minute before shutting off.

Also, current intercooler is air to air. The fan continues to rotate for a minute or so after you put Maverick in park - to help the turbo cool before shutting off.

 

[Master Blaster]

Both coolant & oil stop circulating when engine turned off. To avoid “cooking” the oil in your shutdown turbo - let the engine idle for a minute before shutting off.

Also, current intercooler is air to air. The fan continues to rotate for a minute or so after you put Maverick in park - to help the turbo cool before shutting off.

You should not that this is a bi-cooled turbo, not a straw-hot racecar turbo from 1970. Nobody builds air-cooled turbos anymore. The coolant on a really hot engine runs at maybe 230F, while the oil runs at maybe 400F. It cokes at about 300F to 600F in most dyno oil formulations depending upon the flow rates, and higher in synthetics. For most driving the oil is closer to the coolant temperature. Unless you are running the coolant dry, the max temperature that your coolant-cooled turbo bearings will see is maybe 240F or 250F, so it is extremely unlikely that you can coke the oil in the bearings by shutting down.

 

[Chops]

You should not that this is a bi-cooled turbo, not a straw-hot racecar turbo from 1970. Nobody builds air-cooled turbos anymore. The coolant on a really hot engine runs at maybe 230F, while the oil runs at maybe 400F. It cokes at about 300F to 600F in most dyno oil formulations depending upon the flow rates, and higher in synthetics. For most driving the oil is closer to the coolant temperature. Unless you are running the coolant dry, the max temperature that your coolant-cooled turbo bearings will see is maybe 240F or 250F, so it is extremely unlikely that you can coke the oil in the bearings by shutting down.

You should not that this is a bi-cooled turbo, not a straw-hot racecar turbo from 1970. Nobody builds air-cooled turbos anymore. The coolant on a really hot engine runs at maybe 230F, while the oil runs at maybe 400F. It cokes at about 300F to 600F in most dyno oil formulations depending upon the flow rates, and higher in synthetics. For most driving the oil is closer to the coolant temperature. Unless you are running the coolant dry, the max temperature that your coolant-cooled turbo bearings will see is maybe 240F or 250F, so it is extremely unlikely that you can coke the oil in the bearings by shutting down.

The Turbo Intercooler is air to air. Letting the Maverick idle for a minute will help cool down the turbo.
It will also keep the coolant from the radiator circulating through the turbo - cooling down the turbo.

BTW, I’m not a turbo expert But every turbo expert I listen to tell me warm up & cool down of turbo engines is critical for the health of your oil & turbo.

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