I just had an early valve failure where the valve separated from the stem. Have you seen this before? I had never seen a failure like this. The valve is press fit, so I guess it explains part of it. It only had about 5000 miles before it failed.

Are they known to do this?

 

Holy ****, thats a first.

legit tial usa wastegate. I thought my gate issue years ago was a fluke. Good thing is you should be able to by a replacement valve. Prolly a flaw in the metallurgy. After you clean the stem, can you check and see if there was any pockets or bubbles that couldve been there on the stem or valve.

 

No, the stem and valve looks perfect. I know that turbosmart makes a one piece valve that would have prevented that kind of failure.

 

Wow... That's a bit interesting.

 

Hmmm. Oh i didnt know they were a press fit design, two piece, or whatever style. I wouldve thought it would be forged one piece. Treadstone sale the valves. I just looked, and it does show a small inner circle where it looks like it could be the stem. Also checked tials tech section. Downloads didnt really have much on the the valves. Seen mostly breakdowns and pressures. I skimmed though.

mite be worth a shot to email tial. If its a true tial product. And low miles like you say.

the hole in your pics, looks smaller than the circle of the stem on treadstone pic of the valve. Which is prolly a generic pic.

 

What fuel were you running with this? 93?E85? This makes a difference

 

I am using 93 low boost and 50/50 water meth for high boost.
What makes you think fuel has caused the valve failure?

 

Depending upon the year this was made, the valve for the F38s had no higher compound coating ( not sure of the name of that treatment right now), and was therefore susceptible to feature when using anything other than 93 octane. Lager valves had the treatment already, (before mv-s came out) and didn't have this issue.

For some reason TiAL didn't put the treatment on all valves until much later. So if you were running something outside of 93 octane, running race fuel or methanol, you could destroy the valve.

 

i am gonna buy chinese...

 

No, Russians make better wastegate.

 

It says on their website that the treatment is for running leaded fuel. From their website : ''TiAL's F38 is equipped with the racing valve stem. The Wear Coating is resistant the the corrosive effects of Lead oxide which is present when running leaded racing fuel.''

I never ran leaded fuel. The valve is 2 parts that is press fitted and seems to be spot welded. That's what I think failed.
Do you know anyone who sells replacement valves?

 

OMG that was perfect! LMAO

 

Tial Wastegate 38mm Valve- TREADSTONE PERFORMANCE

 

That information is based upon the last few years. The older ones F38 did NOT have the racing valve. (Websites can only give so much information, that is why they have phone numbers to confirm) That was why I asked how old it was or if the serial number was on it to call and confirm.

TiAL has replacement valves, no other company keeps those except TiAL dealers. By the time you find it, you might as well get a replacement valve or even a Turbosmart Ultragate and be done. (They run the same flanges)