2014 Superb Estate, 4x4 @ 63K. Exhaust  diesel fumes entering cabin with car standing still, engine running. Indie replaced the clamp ring and metal gasket disc which showed signs of blow by on 1/2 the gasket face and all the V segments of the clamp. Parts replaced with genuine VW parts. Leak still there.

Indie does not know what to do next, said he would 'research' into it but basically thanks for the money, go away. They are an VAG specialist.

Anyone have a similar technical issue (as opposed to garage attitude) and found a solution please?

I can only think of changing the parts again.

Thanks, Graham.

There are several other connection points in the exhaust system where gases could escape. You'll need to work through them one by one until the culprit is found.

Thanks for your reply. By the absence of responses it this a rare problem?

 

When the specialist took the old clamp off he had already 'felt' with the engine revving the bottom connection, the flex joint and then this top joint.

He and the other mech decided it was the leak area.

The old parts came off and the steel metal gasket had been blowing past the lower half as evidenced by the soot and similarly the clamp all round, black with soot (I saw the parts that came off).

 

Thus they changed the gasket and clamp. Being a 4x4  there is very little space up there, but he had to free the DPF/downpipe to move it sideways to get access to the turbo/dpf joint.

 

He is now really saying they did the right thing, changed the parts they felt were at fault and the fact it is leaking is one of those things.

They also said I was confusing the general cabin smell with the exhaust fumes and set a CarPlan odore pack off in the interior which has made the inner space a very unpleasant place to be, never asked if this was ok, but they felt it was actually what was wrong....I have not paid for this magic cure.

 

Considering hiring a car lift at a garage near me and doing the job all over myself, but feel very aggrieved.

Here are a couple of similar threads :-

http://www.vwaudiforum.co.uk/forum/showthread.php/171109-Smell-related-to-DPF-Regeneration

http://www.vwaudiforum.co.uk/forum/showthread.php/183502-Getting-gassed-out-Turbo-to-DPF-connection-leaking

 

Everyone seems to say that replacing the band & gasket should be an instant cure.

 

I would say, get the turbo to DPF connection perfectly clean & square to each other.

Get the connection done up tight before tightening up the DPF to engine bolts.

 

The last think you want is inhaling diesel particles, especially when you have a DPF fitted to remove the harmful stuff.

 

Best of luck fixing it & let us know how you get on.

Thank you for these links.

You are dead right to get it all true and tight and then snug tight the mountings.

Iam giving the garage until Wed to offer a solution, doubt they will respond.

Went to my local Skoda dealer this morning and bought a new gasket and clamp ring, cheaper than eBay, VW parts.

Have found a local place where I can hire a car lift for a day for £40, so plan to book a day and do it my self.

The only reason I took this to the specialist was getting access to the underside esp as the 4x4 makes the area under there very tight indeed.

I struggled to reconnect mine when I done the egr valve.

I had the two bolts removed from the support bracket to the block and also further back to the sub frame but ended up having to loosen the two bolts on the dpf to that bracket before I could get the dpf to line up with the turbo correctly without having a fight or forcing it.

once it was clamped back up then went back and refitted/tightened the support bolts

Thanks for the tip.

I've seen that on a few videos on FWD Superbs doing this job, get that L shaped bracket free, do the gasket/clamp tight and get the bracket back on.

With the 4x4 box in the way it has to be done blind...

Not particularly looking forward to doing it unless the specialist comes back to repeat the job for me, but not holding my breath.

I'm sorry to hear about the ongoing issues with your 2014 Superb Estate. Exhaust fumes entering the cabin can be quite concerning. Given that the clamp ring and metal gasket disc have already been replaced with genuine VW parts, it might be worth considering a few additional steps before revisiting the same parts again.

1. Check for Other Leaks: Ensure there are no other leaks in the exhaust system. Sometimes, issues like these can be caused by leaks in different sections, such as the exhaust manifold, EGR system, or even a cracked pipe.

2. Examine the DPF: A clogged or malfunctioning Diesel Particulate Filter (DPF) could cause backpressure and leaks. Although not specific to your vehicle, issues with gaskets related to the DPF, like the Cummins/Paccar DPF Gasket 5417859, could provide some insight. Ensure your DPF is functioning correctly and that all gaskets and connections are intact.

3. Inspect the Seals: Check the seals around the cabin air intake and other areas where fumes might enter the cabin. Ensuring these seals are intact and functioning can help prevent fumes from entering.

4. Pressure Test: Have a pressure test done on the exhaust system. This can help pinpoint any hidden leaks that might not be obvious during a visual inspection.

5. Consult Another Specialist: If your current garage is unable to resolve the issue, it might be beneficial to get a second opinion from another VAG specialist or a mechanic with extensive experience in exhaust systems.

I hope these suggestions help you find a solution to the issue. Good luck, and I hope you can resolve this problem soon.

Edited 27 July, 20241 yr by clampguy1

@clampguy1  Welcome.

The last posts were nearly 4 years ago.  I hope the members had their issues resolved. 

This issue with the car is still with us, no worse despite the years past, but no better either. Guess that means something.

 

I like the idea of pressurizing the exhaust system presumably from the tail pipes up to the turbo.

Back then I hired a hoist at a local motorcycle garage (£10/hour) so could really look around and found nothing.

 

Many years ago i had a Jaguar X Type estate, 2 litre deisel and that have a similar issue, one of the floor pan sean was displaced, fume crept in when stationary.

All clear when fixed 9by Jaguar them selves.)

Will explore the options listed above, thank you.

It's unfortunate that your garage can't fix the DPF/turbo gasket issue. Since this is a critical component, especially for engines like Cummins or Paccar, you want to ensure it's repaired correctly to avoid further damage. Given that your garage can't handle it, here are a few steps you can take next:

1. Seek a Specialist: Look for a repair shop or a mechanic that specializes in diesel engines, particularly those familiar with Cummins and Paccar systems. They should have the expertise to handle a "Cummins/Paccar DPF Gasket 5417859" replacement.

2. Consider OEM Parts: Ensure that the replacement gasket is an OEM (Original Equipment Manufacturer) part, like the "Cummins/Paccar DPF Gasket 5417859," to maintain the integrity and performance of your engine.

3. Get a Second Opinion: If possible, get a second opinion from another garage. Sometimes, what one mechanic can't fix, another can, especially if they have more experience with heavy-duty diesel engines.

4. Consult with Cummins or Paccar Support: You can also reach out directly to Cummins or Paccar customer support for advice. They may recommend certified service centers in your area that are better equipped to handle the repair.

5. Check Warranty: If your vehicle or parts are still under warranty, check with the manufacturer or dealer to see if the repair can be covered. This might save you from out-of-pocket expenses.

Taking these steps should help you get the DPF/turbo gasket issue resolved efficiently.

If your garage is struggling to fix the DPF/turbo gasket issue involving the 20592783 Exhaust Clamp, consider the following steps:

1. Confirm the Part: Double-check that the 20592783 Exhaust Clamp is the correct specification for your vehicle's DPF/turbo setup.

2. Seek a Specialist: Visit a specialized exhaust or turbo repair shop. They may have more specific expertise in dealing with such components.

3. Replacement Parts: If the current clamp isn't sealing properly, it might be necessary to replace it or consider using an alternative model that offers a better fit.

4. Check for Additional Issues: Ensure there aren't other underlying issues contributing to the problem, such as misalignment or damage to adjacent parts.

Taking these steps should help resolve the issue with your DPF/turbo gasket.