Ran up to full boost and then noticed had no spool anymore. Initially thought it boost a boost pipe blew out of silicone boot but the exhaust was loud so knew had a leak. Opened hood and figured that the leak was because the 38 mm wastegate valve had not shut completely. To shut it took a punch and tapped it shut but not sure why did this maybe carbon built up?
Watched a video where someone forgot the metal ring that goes in between wastegate and flange on manifold. Mine never came with any kind of metal ring and never had this issue before. After getting it closed again ran up to full boost again 3-4 times and it did not stick open again.
So is this just something that happens when carbon build is excessive or are there other reasons like a wastegate starting to fail ??

 

What brand wastegate are you using? I've never had an issue with a Tial gate sticking open.

 

cheap Ebay wastegate I'm assuming....

 

Yes, its ebay wastegate. THis is first time it has stuck open though.

So you are saying that name brand waste gates never get stuck open due to carbon build up or other issues ?

 

A quality WG such as a "genuine" Tial does not have issues. Only issues you will hear about a Tial WG was caused by incorrect installation....during spring replacement.

Even an old school Turbonetics Deltagate WG is better than a new ebay one. Buy once, buy the right stuff.

 

Actually gentlemen, i have a geniune tial mvs. I had issues with me gate not closing all the way. Was not due to carbon buildup. The three screws that hold down the diapharm base were backing out. Has been documented in my thread years ago.

 

Blue Loctite

 

TO check this take off the top hat remove spring and find the other screws near the spring seat is ?

Or do you have link and photos on the previous documented thread ?

 

Yes once the top half is off its pretty evident. Therell be three countersunk screws. Its also documented in my thread with pictures. Cant remember what page. Thread is called simply black

 

Of course not. I'm just saying that you're less likely to have an issue with a name brand part, and if you do have an issue, you're way more likely to get some form of customer service when you contact the company.

 

My tial 38mm still holding boost after 10 years