I apologize for jumping in with such a long first post but...
I have an 07 MKV GTI 140K BPY. Bone stock. No tune. It had been making a low, flute-like noise on acceleration for a few months, but other than that no other noticeable symptoms. Then a few weeks ago the whistling noise went away and was replaced by a metallic rattling sound that kind of goes away after the first few moments of the car running. The car was producing abundant smoke from the exhaust and the engine eventually cut out.I was unable to restart because of an EPC condition which I've since come to learn is due to the spark plugs being completely charred.
It's now demonstrating many of the "classic" symptoms of a failed PCV. There is oil pretty much everywhere. It's seeping out of both ends of the upstream (but not downstream) intercooler pipe. There is oil dripping down onto the drive axle. It's in the combustion cylinders fouling the spark plugs as previously noted.
Error codes pulled from the Torque app are the ones you would expect for misfiring spark plugs as well as boost leak (P0299), system too rich (P0171), as well as too lean (P0172). I also get intermittant P0506 and P0106 which I assume means my MAP sensor and throttle body need a good cleaning when this is all resolved. But they're not the main problem.
I replaced the DV with the latest revision which of course had no affect. The old plunger style DV I removed was perfectly fine other than the fact that it was covered in oil.
I replaced the PCV with the latest revision from Beck Arnley and it actually made the problem even worse. I even purchased a different PCV from Vaico just in case there was a defect in the first. Still worse than the original. So I've put the original PCV back on.
I changed the valve cover with a used one off ebay. No improvement. The valve cover came with yet another old style PCV. All four PCVs pass the "blow test." I feel resistance when blowing on the input end.
I've done an engine compression test and the result was 190 psi in all four cylinders. The engine should be good.
At this point, I've reluctantly decided that it's probably a blown turbo. With the engine cover removed, I can just barely reach back and under the turbo's exhaust manifold and feel the waste rod actuator arm. It seems to be firm. I'm thinking that the rattling noise on start is an important clue. Maybe part of the compressor has broken free. I have a no way to know without removing the turbo. And if you're removing the turbo, you may as well replace it.
The car is driveable. But barely. It struggles to make power. I can drive at low speeds for short distances. Any hard acceleration at all produces smoke and is liable to barbecue the spark plugs. I've gone through three sets already. They're cheap, but it starts to add up. I've also burned through a whole jug of nice 0W40 Pennzoil Euro. I've temporarily switched to Amazon Basics 0W40 Euro until I can get things sorted.
I've been reluctant to take it to a VW dealer because they'll take one look at the smoke coming out of the exhaust and say oh yeah, that's a blown turbo -- since that would be the most expensive (and potentially most lucrative) repair. My fear is that they will collect an easy $125 diagnostic fee without doing a lick of work.
So I've gone ahead and ordered a used, low mileage K03 turbo taken from another VW with a BPY engine. I'll find someone to install it, but before I do, I thought I'd quiz the forum members for anything I might have missed in either my thinking or analysis that should give me pause before pulling the trigger on the turbo replacement.
Indebted for any help provided.
I have an 07 MKV GTI 140K BPY. Bone stock. No tune. It had been making a low, flute-like noise on acceleration for a few months, but other than that no other noticeable symptoms. Then a few weeks ago the whistling noise went away and was replaced by a metallic rattling sound that kind of goes away after the first few moments of the car running. The car was producing abundant smoke from the exhaust and the engine eventually cut out.I was unable to restart because of an EPC condition which I've since come to learn is due to the spark plugs being completely charred.
It's now demonstrating many of the "classic" symptoms of a failed PCV. There is oil pretty much everywhere. It's seeping out of both ends of the upstream (but not downstream) intercooler pipe. There is oil dripping down onto the drive axle. It's in the combustion cylinders fouling the spark plugs as previously noted.
Error codes pulled from the Torque app are the ones you would expect for misfiring spark plugs as well as boost leak (P0299), system too rich (P0171), as well as too lean (P0172). I also get intermittant P0506 and P0106 which I assume means my MAP sensor and throttle body need a good cleaning when this is all resolved. But they're not the main problem.
I replaced the DV with the latest revision which of course had no affect. The old plunger style DV I removed was perfectly fine other than the fact that it was covered in oil.
I replaced the PCV with the latest revision from Beck Arnley and it actually made the problem even worse. I even purchased a different PCV from Vaico just in case there was a defect in the first. Still worse than the original. So I've put the original PCV back on.
I changed the valve cover with a used one off ebay. No improvement. The valve cover came with yet another old style PCV. All four PCVs pass the "blow test." I feel resistance when blowing on the input end.
I've done an engine compression test and the result was 190 psi in all four cylinders. The engine should be good.
At this point, I've reluctantly decided that it's probably a blown turbo. With the engine cover removed, I can just barely reach back and under the turbo's exhaust manifold and feel the waste rod actuator arm. It seems to be firm. I'm thinking that the rattling noise on start is an important clue. Maybe part of the compressor has broken free. I have a no way to know without removing the turbo. And if you're removing the turbo, you may as well replace it.
The car is driveable. But barely. It struggles to make power. I can drive at low speeds for short distances. Any hard acceleration at all produces smoke and is liable to barbecue the spark plugs. I've gone through three sets already. They're cheap, but it starts to add up. I've also burned through a whole jug of nice 0W40 Pennzoil Euro. I've temporarily switched to Amazon Basics 0W40 Euro until I can get things sorted.
I've been reluctant to take it to a VW dealer because they'll take one look at the smoke coming out of the exhaust and say oh yeah, that's a blown turbo -- since that would be the most expensive (and potentially most lucrative) repair. My fear is that they will collect an easy $125 diagnostic fee without doing a lick of work.
So I've gone ahead and ordered a used, low mileage K03 turbo taken from another VW with a BPY engine. I'll find someone to install it, but before I do, I thought I'd quiz the forum members for anything I might have missed in either my thinking or analysis that should give me pause before pulling the trigger on the turbo replacement.
Indebted for any help provided.
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