This just happened on my way to work so I can't look at it yet fully. Noticed the noise of the procharger was gone, no boost, nothing out the bypass, not pulling air through the filter, no blow off, nothing. It's like someone ripped it out while I was driving. No big bang noise happened or anything it just stopped. I can see the belt turning and I did check it's very tight. Any ideas of what to do next or check? I'm going to pulley the inlet when I'm off to see if the impeller is turning but I doubt it.

Can really use a break here. The master cylinder went out on the way to a funeral on the second and i just got that fixed last night just for this to happen.

 

I'm not too familiar with Procharger head units but don't they take oil?? Maybe take a peek and see what's going on with the oil and if there's metal in there or not. Possible the gears inside left the party but I'd think you'd hear or feel that.

Next I'd check all the piping from the head unit thru the intercooler and to the throttle body. Maybe a silicone coupler blew apart/slipped off and everything is just venting straight to atmosphere

 

Never had that happen. Been through 3 of these head units and when the head unit went it took the belt with it (ie. locked up, or partially locked up). I would drop the blower and turn the pulley by hand. As you suspect, if the impeller doesn't move, time to send it back as a core and upgrade to a D1-x

 

Are the head units able to be rebuilt?? Or is the cost really high and not worth it?? I was wanting to go Procharger when I was in the building stages of things but ultimately went turbo

 

You can rebuild them. If it isn't grenaded it used to be like $600 - not sure what it is now. A handful of places do it.

You used to be able to buy rebuild kits online as well - probably still can.

 

There is a key on the shaft keeping the pulley driving the charger. Maybe it sheared. My buddy changed his pulley and a short time later it sheared the key. Lucky for him it ruined the key and pulley. Put the old pulley with a new key its been fine.

 

Okay so it seems like it's "working" now. That procharger noise is back, I can hear it blow off but my boost is super low. It was raining 6heavy that day and I did go through a pretty large puddle so I'm assuming it got real wet and I had serious slip.

I'm getting around three pounds of boost on a d1sc, 7.65 crank and 3.4 blower, 8 rib. All my couplers are tight but may crank them down some more, i checked for water in the y pipe looking pipe off the head unit and connected hoses, retightened the belt yesterday just to make sure, cleaned the filter, and even checked the plenum for water.

Last thoughts to go over are possibly water in the intercoolers, still maybe a boost/vacuum leak somewhere, adjusting the bypass, maybe the filter is completely plugged, not sure.

I was before seeing 7-10 pounds which I also suspected to be low for the setup but I'm building a 6.0L and going fmic route so I wasn't to concerned about all the culprits of low boost since it's all being addressed soon (boost leaks at couplers, worn rings, cracked intercooler, etc.) But such low boost now is alarming. I feel even like I can feel the difference and even hear my motor and exhaust more than I could before as all it was before was that procharger scream.

Tomorrow I'll check my connections, look at the belt but it probably has less than 1500 miles on it and it's real tight, maybe pull the filter for a single pull, basics to narrow this down.

and I do apologize for possibly jumping the gun making this post but leading up to all this but in the last month my alternator died so I swapped to the truck style knowing it's better for our platforms. That opened a whole can of worms with fitment I was dealing with just to swap back to the original style, shortly after had a passing in the family, on the way to the funeral is when the clutch pedal stuck to the floor, swapped the master cylinder to the tick adjustable (fantastic pedal feel), and then the next day this started happening. Just been a lot lately so just assumed the worst case when this happened.

 

well its odd a belt driven , gear driven internally unit stops making sound and then works again , i cant imagine you hydro locked it for some time and then it drained and its fine . Did you ever take the inlet off or the procharger off , even in rain mine wont get belt slip when its low rpm , it should always be making sound .

 

Didn't take the inlet off but did disconnect the line from the inlet to the bypass and the rubber cap off whatever the bronze barb fitting is and no water was felt. Yeah completely weird but there was literally 0 sound from it while running. It was heavy rain and I did go through a big puddle but still weird.

 

I'd still check that keyway, maybe it spun and grabbed again.
Last thing you want is to think it's all okay and it really destroys something.