Alright, I just removed and resealed my PS/VAC pump assembly. Got the seal kit from Cummins, took my time and did it right. I get the thing back on, go for a test drive and its STILL leaking oil (much less oil, though, and only from one place this time).

It's leaking from the first joint away from the timing case seal. It's the joint that doesn't even look like a joint when the pump is assembled. I'm guesing it's just worn/sloppy or something.

Here's my question: Can I add gasket maker here? I really don't want to buy a new Vac pump.

 

You replaced the o-ring there?

 

I did. I used the full Cummins seal kit with all four replacement seals. I thought I read somewhere about excessive wear at this joint necessitating a modified seal. I didn't fact check that, though.

I do know, however, that in the thread about the seal part number I made, you advocated buying a seal kit from a certain vendor. I already had the Cummins seal kit so I just used it, but I did note that the vendor that you mentioned included some sort of "improved, double lipped seal". Could this (or the lack thereof) be my problem?

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