Wastegate Diaphram

[duncan]

What happens if you pinch the diaphram in a tial wastegate changing springs? Boost creep, no boost, slow to boost? Has anyone ever done this, what should one look for?

[Alen Danial]

well if you have some form of way to check for leaks i would do so i had a tore diaphram and it was causing me to loose boost at the starting line not good double check to make sure no leaks

[Cycle Concepts]

put a vaccum on it..if it holds, you're good..it not, replace it.

[Oz Booster]

Pinching the diaphram under the top cap can stop the wastegate moving thru its normal range, may overboost
Can cause a cut in the diaphram then boost pressure cannot push the valve off its seat , again overboost

[mattz14]

x2 overboost check to be sure, you motor might just thank you for it!

[NLRsystems]

you cannot tell if you pinched the diaphragm by pulling vacuum or applying pressure. You need to put it together carefully so you dont pinch it.
If there is a rupture in the diaphragm then you can tell by applying pressure to the top.

[rocketgeezer]

you cannot tell if you pinched the diaphragm by pulling vacuum or applying pressure. You need to put it together carefully so you dont pinch it.
If there is a rupture in the diaphragm then you can tell by applying pressure to the top.

This is how I found a problem with mine