From a quick search it seems a big job, has anyone done it or got a link to how to do it?

It would help people if you said which engine (size and code) you have fitted.

Octavia II 1.6 FSI 2008.

Engine code BGU?

If so it (item 31) looks like two nuts, one electrical connector and a hoseclip to remove? throttle valve control element; vacuum system; int... - Octavia(OCT) [EUROPA 2008 year] (7zap.com)

The nuts/studs will likely be rusty, so penetrating oil applied a day or two before trying to remove will be wise.  Wire brush them too if you can get a small brush to them.

43 minutes ago, Wino said:

Engine code BGU?

If so it (item 31) looks like two nuts, one electrical connector and a hoseclip to remove? throttle valve control element; vacuum system; int... - Octavia(OCT) [EUROPA 2008 year] (7zap.com)

The nuts/studs will likely be rusty, so penetrating oil applied a day or two before trying to remove will be wise.  Wire brush them too if you can get a small brush to them.

 

P0401 code. Exhaust Gas Recirculation (EGR) system flow is insufficient.

 

im just going to clean it.

 

You may well find that the valve itself is pretty clean (they run very hot); but there may be some blockage at the throttle-body end of the metal pipe coming off it. That may be much easier to get to.

 

When I say engine code, I mean the 3 or 4 letter code that precisely defines your engine type. More specific than 1.6 FSI. It's on the build data sticker in the boot and/or the service book.

 

Edited 25 January, 20215 yr by Wino

2 hours ago, Wino said:

You may well find that the valve itself is pretty clean (they run very hot); but there may be some blockage at the throttle-body end of the metal pipe coming off it. That may be much easier to get to.

 

When I say engine code, I mean the 3 or 4 letter code that precisely defines your engine type. More specific than 1.6 FSI. It's on the build data sticker in the boot and/or the service book.

 

 

It's 1KZ or 1FZ I think or something close, weird but that diagram isn't the correct diagram. My EGR has 4 X T30 fasteners and the 2 X hoses and electrical connector. I'm pretty sure I'm looking at the right thing, it's attached to the side of the cylinder block, maybe not though. I can take a pic?

 

As you would expect one of the T30 was rusted and it's now rounded out so have ordered a T35 and hopefully that will work otherwise another headache. Apart from that seems a very easy job.

Neither of those sound right for your engine code. Check the stickers.

The diagrams in etka are sometimes a bit generic, but what you are describing sounds more like the throttle body. Photos always useful.

3 hours ago, Wino said:

Neither of those sound right for your engine code. Check the stickers.

The diagrams in etka are sometimes a bit generic, but what you are describing sounds more like the throttle body. Photos always useful.

 

 

This is what I thought was the EGR but I also see a component on top of the inlet manifold which could be it. So the first 2 pics are what I initially thought and the 3rd pic the other possibility though both may be wrong. It was dark and I only spent a few minutes looking.

 

 

 

 

Those first two pics do look like an EGR, but not a type I'm familiar with.

 

The fitting at the inlet manifold, where the EGR output flow joins the airflow coming down from the throttle body, would still be the area I think you are most likely to find blockage.

Ringed in red here:

 

 

BTW, it seems like your engine code is BLF, and the diagram I linked before is the wrong one. Here's the correct one, showing the EGR valve looking more like your reality:

intake system; vacuum system; activated carbon fil... - Octavia(OCT) [EUROPA 2008 year] (7zap.com)

Edited 26 January, 20215 yr by Wino

6 hours ago, Wino said:

The fitting at the inlet manifold, where the EGR output flow joins the airflow coming down from the throttle body, would still be the area I think you are most likely to find blockage.

Ringed in red here:

 

 

BTW, it seems like your engine code is BLF, and the diagram I linked before is the wrong one. Here's the correct one, showing the EGR valve looking more like your reality:

intake system; vacuum system; activated carbon fil... - Octavia(OCT) [EUROPA 2008 year] (7zap.com)

Great work, thanks for the help!

 

That looks right.

 

Also looks like the fasteners are M6 spline not T30 torx. Very similar though.

Edited 26 January, 20215 yr by Aj77

12 minutes ago, Aj77 said:

looks like the fasteners are M6 spline not T30 torx. Very similar though.

Spline are 12-point, Torx 6 point, should be easy to spot which?

1 minute ago, Wino said:

Spline are 12-point, Torx 6 point, should be easy to spot which?

 

Yes it was dark and I guessed though the T30 did loosen 3 of the bolts they must have been a bit loose anyway but hence why I rounded one of them as it was a bit rusted also. I know now to double check. 

Have ordered an M6 bit.