D4BF Boost and EGT issue

algor251 said:
Early this morning on my drive is when I blew the relief valve. It was completely gone. The only reasons I noticed that are I lost all boost and it sounded like I had a hole in my exhaust. I’m trying to figure out how it unthreaded itself. I never heard it blow off or thought of it until it was gone.
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So did you plug or replace the valve? If it's blowing too early, or sticking open it might explain some of what you're experiencing.

Specs for threaded plug here:

https://delicaforum.com/index.php?t...-i-install-a-boost-controller.2962/post-23776
 
algor251 said:
The valve blew out completely. It wasn’t even in the engine bay anymore when I went to plug it.
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Crazy! I have mine capped currently, because it's in there so tight (they used some kind of thread sealant) I can't turn it, to remove it, lol.

Just an off the cuff question for your trouble shooting consideration: any possibility something fell/wedged down the hole where the valve was and might be contributing to your issues?
 
Sputnik said:
Crazy! I have mine capped currently, because it's in there so tight (they used some kind of thread sealant) I can't turn it, to remove it, lol.

Just an off the cuff question for your trouble shooting consideration: any possibility something fell/wedged down the hole where the valve was and might be contributing to your issues?
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That very well could be. I’ve been trying to refrain from thinking that because of how big of a PITA it’ll be to get to, but it’s a possibility. I’ll have to take a look this weekend. I wish I had the valve to see what it looks. It blew off on the freeway and I have no idea where it went. I just lost all boost and it became very loud from right under my seat.
 
algor251 said:
That very well could be. I’ve been trying to refrain from thinking that because of how big of a PITA it’ll be to get to, but it’s a possibility. I’ll have to take a look this weekend. I wish I had the valve to see what it looks. It blew off on the freeway and I have no idea where it went. I just lost all boost and it became very loud from right under my seat.
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I believe valve model (at least for 4D56) is me201831, for you to take a look at it. The valve overboost release is supposed to happen around 12psi on that unit.

The red stuff on the threads is a thread sealant/thread locker, which is why I'm surprised yours unscrewed itself, but maybe it's different in a D4BF.
 
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