• Evo Magazine are looking for a mint and (and ideally unmodified) Leon Cupra Sub8 to drive and photograph for a feature. Find out more here .
  • Hey Guest👍👎 We're looking for reviews of your local CUPRA or SEAT Dealership - it's quick and easy to do: Leave a review now

kwlw

Active Member
Nov 22, 2019
38
9
Hi,

I was changing spark plugs on my 2018 1.5 TSI ibiza and after assembling everything back, engine idles smoothly, but no torque. Like it was boost leak. I have pulled back boost pipe from turbo to intercooler and realized that the end which goes to the turbo - has a seal, however the part which goes to the intercooler - does not have any gasket neither on pipe or intercooler. It's plastic-plastic connection. Even it's tight, I have certain doubts regarding it being sealed.

Should it be like this and only later 1.5 TSI (which side pipe connection near the turbo on boost pipe) have the rubber seal, or mine somehow disappeared (I lost or someone at the Seat service)?

Part #13 on the diagram.
image_2026-10-31_192708829.png