UPDATE!!! Do you guys think this is a supercharger coolant pump leak?

[Old Mopar Guy]

Interesting take from one of the guys on the other forum:

“Awesome pics. Never seen anyone take this apart. Appears be a shaftless ECM style (Electronically Commutated Motor) pump, like a hot tub circulation pump.

Now I'm confused. No coolant is supposed to be circulating inside the body (where the electronics are) and it appears to be dry and clean. So the o-ring is doing its job preventing outside contamination (and the stray coolant) from getting INSIDE. So where is the coolant leaking from? Can somebody clear my confusion?”

Awesome point this guy makes! I’ve got to think maybe the fluid is wicking up through the threads on the 1 screw holding the assembly together. 3 other screws go through the treaded casing. Only the one goes into the body. Screws appear to have thread compound. I’ll install a new o ring and thread sealant on the screws before equal torquing.

 

[Old Mopar Guy]

The rivets on the front make 0 sense. Ran across those on our Challenger. My Charger does not have any, just the plastic pins

The rivets were in the edge of the wheel wells. I don’t remember, but maybe I used them when I added the Phillips Flares? It’s been a while.

 

[Unholy707]

Yep, that front part comes off more and is most likely where it's leaking from. Not sure how to separate the front plate, you can see it's still 2 plates in the pic

 

[Old Mopar Guy]

The pump halves seem to split into 1/3’s. Very little lateral movement on the shaft from side to side. I don’t know what’s within spec. O ring looks great. The mystery deepens…

 

[Old Mopar Guy]

So all 3 portions of pump assy. disassembled. 3 o rings to replace (still need to measure)as well as thread seal the snot out of the assembly hardware. I don’t think I’m going to add paper gaskets between plate but I will Permatex plates when I reassemble.

 

[16GoManGoHC2]

That’s the culprit in these last pictures you posted, replace it and you should be golden. I would not use rtv, you’ll never get it apart again!! A new oring should seal it. 👍🏻👍🏻

 

[Old Mopar Guy]

Thanks Mike. Fingers crossed!

 

[2ndAmend]

Is the surface of the alum etched/corroded? Kinda looks like it in the photos, let us know. I agree to avoid RTV/Permetex if possible. But it helps when you need it when you have a bad situation and hope never to have to go back into it. If you are as old as me, I wouldn't worry so much!

 

[Old Mopar Guy]

Certainly seems a bit etched @2ndAmend. I’ll have to clean it all up, but I am having a prob finding proper sized o rings. McMaster Carr doesn’t seem to have them. Still searching. Never mind going back in, hell, I’ll JB Weld the pos together!!!

 

[BULL]

Certainly seems a bit etched @2ndAmend. I’ll have to clean it all up, but I am having a prob finding proper sized o rings. McMaster Carr doesn’t seem to have them. Still searching. Never mind going back in, hell, I’ll JB Weld the pos together!!!

Keep in mind, while not ideal, it would be ok to have to slightly stretch an undersized O.D. oring to fit your application.

The trick is figuring out what slightly means. As just one example, using a 100mm O.D. ring to fit a 4" application. The cross section is much more important

 

[Unholy707]

definitely where mine is leaking as well. Nice to see this taken apart

 

[2ndAmend]

Certainly seems a bit etched @2ndAmend. I’ll have to clean it all up, but I am having a prob finding proper sized o rings. McMaster Carr doesn’t seem to have them. Still searching. Never mind going back in, hell, I’ll JB Weld the pos together!!!

Yikes! If McMaster doesn't list the size, I'm not sure where to go or who to trust. Do you have a OD, ID and grove width? I can take a look. Bull is right, and larger o-rings tolerate a little stretching better than small ones.

 

[Old Mopar Guy]

I ordered a few different sized o rings earlier this am at a local WW Grainger. They should be in tomorrow. I’m bringing the pump to fit the rings.