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Pcv, breather box help

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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TyRawr
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Re: Pcv, breather box help

Post by TyRawr » Sun May 24, 2020 3:40 pm

Thank you. I didn't know that that's how the coolant flowed through that pipe. When installing new banjo bolts do I need to line them up so the hole in the bolt is facing the hole in the pipe?

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abscate
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Re: Pcv, breather box help

Post by abscate » Sun May 24, 2020 4:27 pm

No, a banjo will flow no matter the orientation.



Technically, since there are two, they are dualing banjos

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TyRawr
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Re: Pcv, breather box help

Post by TyRawr » Sat May 30, 2020 3:20 pm

So i replaced the pcv coolant hose, breather box, coil packs, and the spark plugs and the car is still telling me I have a p0300, p0301, p0302, p0304. Which is misfires. But how can I replace all that and still have this problem?

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Re: Pcv, breather box help

Post by - Pete - » Sat May 30, 2020 3:34 pm

What are you using to pull codes?
I assume it is running very poorly, or barely at all?
You’ve ensured that all the wires that go to the coils aren’t pinched or severed somewhere?
I suspect there are other codes that you may not be able to see, if using a basic reader.
2001 V70XC 146k
2004 V70 AWD 141k
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Re: Pcv, breather box help

Post by TyRawr » Sat May 30, 2020 3:43 pm

I'm using an innova 3020. And it is running but poorly. Its acting exactly how it did before I replaced everything

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Re: Pcv, breather box help

Post by TyRawr » Sat May 30, 2020 3:43 pm

And yes I went over all wires

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Re: Pcv, breather box help

Post by TyRawr » Sun May 31, 2020 12:16 pm

Replaced the spark plugs, coil packs, coil pack wire harness, checked injectors, wired in new fuel rail wire harness. Problem still persists. Codes. P0300, p0301, p0302, p0304
Thinking head gasket needs replacing.

And cleaning that manifold really makes a difference. Before and after pics.
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Before
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After

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Re: Pcv, breather box help

Post by volvolugnut » Sun May 31, 2020 6:54 pm

TyRawr wrote:
Sun May 31, 2020 12:16 pm

And cleaning that manifold really makes a difference. Before and after pics.
What did you use to clean the intake manifold? It sure looks great.

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Re: Pcv, breather box help

Post by TyRawr » Sun May 31, 2020 7:42 pm

I used my drills. I have 3 I altered between and about 3 hours of cleaner and brushing. I used a couple wire brush attachments, actual wire brushes for those hard to reach areas and some chemicals. Here's a couple pictures of what I used. Gunk for outside, carb for inside.
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Re: Pcv, breather box help

Post by - Pete - » Sun May 31, 2020 8:11 pm

I have a couple questions for you.
I can’t tell on the coils; I tried zooming in on the high resolution images but I can’t quite make out if there is any writing on the tops of the coils. If they are no-name-brand/Chinese cheap coils, they will be blank & I would not be surprised if one or more of them are dead right out of the box. Also, what did you go with for plugs?

Now, before you buy more coils, have you checked your compression? Did you take a close look at your injectors, & possibly clean them?

From the looks of it you are doing very meticulous work, nice job on the wire loom!
Also, nice job on the intake plenum! Most of mine have mouse piss & years of ugly stuff on them :lol:
2001 V70XC 146k
2004 V70 AWD 141k
2004 V70R M66 144k
2004 XC70 287k
2006 XC70 155k Sold

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