Supercharger leak and PSI problem

**BullittGP1998** · 02-22-2010

I just changed the coupler and the oil in my supercharger, and after a little while I noticed that there was a slow leak below the nose of it. I had sealed the supercharger with the sealant I got in the kit the coupler came with (from ZZ Performance). After closing the SC back up, I waited a day before filling the supercharger with oil. After finding the leak, I cleaned it and waited to see if it would leak some more, and sure enough it came out of the bottom of the supercharger again. I ran the engine and even revved it to see if it leaked more, and it did, but less and less each time. Here's the thing: It's been a day and it has since stopped leaking. There is still oil in the supercharger, maybe 4/5ths of it, and it runs fine. It hasn't leaked since. Why was it leaking? Did I put too much oil in? I put in two bottles of 4 ounces GM supercharger oil. Should I have put in 1 1/2 instead?

Also, the supercharger was maxing at 3 PSI before changing the coupler, but after the change it has only gotten to 5 psi. What could it be? Just to note, the upper radiator hose looks like it is collapsing/flattening. Would that have anything to do with it?

Thanks in advance!

**almighty** · 02-23-2010

I think 1.5 bottles of gm oil is the correct amount, flat upper radiator hose sounds like coolant might be a bit low and need a bleed make sure you do this. and low psi might be related to bbv solenoid disconnect the hose that goes to the bottom of the canister, then block off the hose, leave the bottom of the canister open, then test. be careful if this fixes your boost issue you will want to tune torque management out of the motor and trans to prevent injectors from being shut off during low traction conditions, full boost and no fuel are a very bad situation.

**BullittGP1998** · 02-24-2010

Originally Posted by almighty

I think 1.5 bottles of gm oil is the correct amount, flat upper radiator hose sounds like coolant might be a bit low and need a bleed make sure you do this. and low psi might be related to bbv solenoid disconnect the hose that goes to the bottom of the canister, then block off the hose, leave the bottom of the canister open, then test. be careful if this fixes your boost issue you will want to tune torque management out of the motor and trans to prevent injectors from being shut off during low traction conditions, full boost and no fuel are a very bad situation.

Fantastic. Thanks for the advice!

BTW, I went backed and resealed the nose to the SC, just to be safe. No leaks so far.