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One More Air Leak Resolved - Holset Air Control Valve


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I aired up the coach with shop air and heard an air leak from 20' away.  It was the Holset Turbo Actuator  Air Control Valve 3770742 .  Inland Kenworth had it in stock so a couple of hours later and a much lighter wallet that leak has been resolved.  Who knows how long it was a small leak and in an inaccessible spot that I probably would have never discovered it. 

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Edited by Hypoxia
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I guess this is another "Pay to Play" type parts, they think highly of it and after a quick search the price is pretty much fixed.  

So you couldn't hear a leak after you parked, only after you filled your compressed air system remotely???

 

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4 hours ago, Hypoxia said:

I aired up the coach with shop air and heard an air leak from 20' away.  It was the Holset Turbo Actuator  Air Control Valve 3770742 .  Inland Kenworth had it in stock so a couple of hours later and a much lighter wallet that leak has been resolved.  Who knows how long it was a small leak and in an inaccessible spot that I probably would have never discovered it. 

0cd6c83a-29a6-4b63-b6e4-0d33d5d48dbc.thumb.jpg.77a74fec02e54c1a12774e857cdb8bc7.jpg

 

 

c3ab9778-74a0-42f5-93f2-8c8d9d2112ac.thumb.jpg.8ef1db5fb688372dfefde09d95d3e830.jpg

Did you consider a rebuit one, or, a rebuild kit?

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It was just a coincidence that I heard the leak using shop air.  It may have been a slow leak that turned into a large leak or possibly a diaphragm ruptured at that point in time.

I considered a rebuilt one but the ISX guys convinced me to get a new Holset.  If it saves a problem while travelling it's worth it but we'll never know about that now.

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  • 3 weeks later...

Started the coach for a fuel run, no air.  Fortunately I could hear an air leak coming from the compressor governor so I ran to Inland Kenworth and purchased a replacement ($15).  An hour later I had air!

 

 IMG_3135.thumb.jpg.83991512b4286ae5e81c6c472fac3c73.jpg

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