Could REALLY use advice on PCV valve
04-18-2018, 07:33 AM
#31
AudiWorld Super User
Agreed w/ sentiments and thoughts about possible recall. Keep receipts for any out of warranty repairs. From watching situations like Audi coil packs and MAF's over the years, this feels like it may eventually end up w/ a recall and then reimbursement for any owner expenses already incurred.
Last edited by MP4.2+6.0; 04-18-2018 at 07:36 AM.
04-19-2018, 02:53 PM
#33
AudiWorld Member
04-25-2018, 06:02 AM
#34
Not a totally related issue but trying to post as much info for people in the future troubleshooting...
1 day after swapping the PCV the car threw the following code:
P0491 - Secondary Air Injection System Insufficient Flow Bank 1
I doubted the air pump would coincidentally go right after the PCV so poking around it seemed to be a vacuum line that wasn't re-attached properly!
Further reading: https://www.obd-codes.com/p0491
1 day after swapping the PCV the car threw the following code:
P0491 - Secondary Air Injection System Insufficient Flow Bank 1
I doubted the air pump would coincidentally go right after the PCV so poking around it seemed to be a vacuum line that wasn't re-attached properly!
Further reading: https://www.obd-codes.com/p0491
Last edited by Psy Wagon; 04-25-2018 at 06:05 AM.
04-29-2018, 11:10 AM
#35
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04-29-2018, 12:28 PM
#36
AudiWorld Member
Turbo removal is not necessary. My wife on vacation a few months ago experienced the oil separator/pcv failure in Phoenix on here way to Disneyland in CA. I'm a mechanic/shop owner by trade. After having my son help her pull codes and do some research, we concluded what the problem was. She rented a car, went about her way on vacation while I determined course of action. Drive the 4 hrs one way and attempt the repair on my own, load it on a trailer and pull it home or have a dealer do the job. After calling the Audi dealer service department, and hearing they were booked into the following week I decided I would attempt the repair in my parents driveway with simple hand tools bought at the harbor freight store as I didn't know what I would need. Long story short, it took about 5 hrs to do the repair. Most difficult portion was the intake on either head at the front of the car. Not much room to get those screws holding the halves together.
06-25-2018, 06:27 AM
#37
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Same problem here. 2015 S7 with 57,000 miles. Engine started whistling and just took in for service. I was told on the 4.0T, the valve is located underneath the engine and labor would be over $1200 with total cost of approx. $2,000 - this is crazy. I agree - There should be a recall on this as way too many issues and no way this part should fail with just over 50K miles.
12-29-2018, 10:19 AM
#38
AudiWorld Super User
Mine just failed at 86k. My CPO ran out about a month ago. Negotiating with Audi to see if they will cover it. I highly doubt they will. Seem like it won't be too difficult to do. The A8 and S8 don't require front bumper removal. I'm still driving the car while they make up their mind. With the CEL on it definitely prohibits boost. It hasn't affected fuel mileage though.
12-29-2018, 12:06 PM
#39
AudiWorld Member
Here is the parts list from when I did my PCV valve/Oil separator, 2013 A8 4.0T, total was about $480 all genuine Audi parts. Manual says to replace all gaskets, so that's what I did.
Description:OIL SEPARATOR.
Part Number: 079103542E
Quantity:1
Price:$292.00
Description:Air guide gasket. Intercooler gasket.
Part Number: 079129717J
Quantity:1
Price:$49.60
Description:Air guide gasket. Intercooler gasket.
Part Number: 079129717K
Quantity:1
Price:$49.60
Description:Adapter seal strip.
Part Number: 079145417B
Quantity:2
Price:$19.25
Description:GASKET. Throttle valve seal strip.
Part Number: 079145818
Quantity:1
Price:$13.10
Additional info:
I reused all my hose clamps as I found a nice tool for crimping them, similar tool on ecs:
https://www.ecstuning.com/b-schwaben...UaAmhPEALw_wcB
The only other "special" tool I needed was a very long 5mm hex/allen key, about 8 inches long. Other than that, have a good set of socket extensions and universal joints.
EDIT: You'll also need a coolant refill tool. This creates a vacuum in the system (simultaneously checking for leaks =]) allowing you to perfectly fill it with coolant.
https://www.ecstuning.com/b-schwaben-parts/coolant-refill-air-purge-tool/003466sch01/
Description:OIL SEPARATOR.
Part Number: 079103542E
Quantity:1
Price:$292.00
Description:Air guide gasket. Intercooler gasket.
Part Number: 079129717J
Quantity:1
Price:$49.60
Description:Air guide gasket. Intercooler gasket.
Part Number: 079129717K
Quantity:1
Price:$49.60
Description:Adapter seal strip.
Part Number: 079145417B
Quantity:2
Price:$19.25
Description:GASKET. Throttle valve seal strip.
Part Number: 079145818
Quantity:1
Price:$13.10
Additional info:
I reused all my hose clamps as I found a nice tool for crimping them, similar tool on ecs:
https://www.ecstuning.com/b-schwaben...UaAmhPEALw_wcB
The only other "special" tool I needed was a very long 5mm hex/allen key, about 8 inches long. Other than that, have a good set of socket extensions and universal joints.
EDIT: You'll also need a coolant refill tool. This creates a vacuum in the system (simultaneously checking for leaks =]) allowing you to perfectly fill it with coolant.
https://www.ecstuning.com/b-schwaben-parts/coolant-refill-air-purge-tool/003466sch01/
Last edited by sushistrip; 01-04-2019 at 11:47 AM.
12-31-2018, 06:03 PM
#40
Yep, $500 in parts and about a 4 hr job...did mine at 78k miles...easy job actually...also 4 hrs to do downpipes, and 2 hours to do plugs (but plugs will go faster next time)...