VOLVO D13 - I-shift transmission air leak

I had two boost leaks recently causing same issue. One at blue rubber on my cac and one at my flex pipe clamp.

 

Enko , when you get a chance please everyone know what you discovered about your sound. thanks

 

Ya...theres a junction block of little air lines(back behind the cab body). Notorious for leaking.Most of our old Volvos "went flat overnight".

 

Thank for your help , i have volvo 2015 I shift have same issue with this valve but I have different brand it's , Haldex 90555399 Pressure Protection Valve 60psi I don't know if this is the original or the old owner replace it before

 

I can't help with whether it's original or not for sure, but Haldex's website does show it as OEM/Original Equipment and offers 90555396 as an aftermarket solution

https://www.haldex.com/en/na/valves...s/haldex-pressure-protection-valves/90555396/

 

This is original get the same valve from Volvo careful it is directional. Air only goes one way

 

I also am having this issue on a 2013 Mack with MDrive. Any luck finding the cause?

 

I also am having this issue on a 2013 Mack with MDrive. Any luck finding the cause?

 

Hey Nas I am assuming that this pin hole is not suppose to be blowing air? When aired up it has a pretty good amount of air coming out and when shut off it just keeps leaking air until the tank is empty. Is it rebuilable or just replace it? Hole in the side of the pressure regulator for the 4th air tank that is

 

Is this the bottom valve you are talking about on auxiliary trans tank. If yes no it’s not supposed to leak not rebuildable better replace it.