QSC Aftercooler Part Identification

[Tom Bartolomei]

In the attached diagram, there is a ring between the two O-rings (#11). I’m not familiar with what that ring is so any help would be appreciated. My aftercoolers are on the bench now at a local shop as I could not get the cores out on my own. I just want to have all the required parts upon my reassembly of them. I do have the O-ring kits and more than enough lube from seaboard.

Thanks,
Tom

Topic

[Rob Schepis]

Those strips were “intended” to channel the flow of air flow.

[Tom Bartolomei]

Thanks Corey. I removed the silicone strips. As an old mechanical engineer myself, I can’t understand their intended design purpose frankly. As to the pitting, its location was on the inner bore surface of the housing and was minor compared to various photos I looked at on SBMAR. The actual sealing surfaces of the housing and the cores themselves were very smooth and clean. Greased them all up, o-rings on, aluminum sealing rings in, and done.

I did run the engines up to 1100 RPM with the manifold hose disconnected. Wrapped an industrial paper towel around the aftercooler discharge to see if any water spray or drops were evident. Saw nothing.

Deemed all was okay and back together again.

Tom

[Corey Schmidt]

Of course we’ll need to see some clear pictures re: the pitting…

We throw the silicone strips away as they are junk and always a hassle….. some people cannot live without them however…

[Tom Bartolomei]

Is the current thinking still to remove (and discard and not replace) those 3 silicone strips that run along the length of the cores?

The cores cleaned up nicely, pressure tested checked out. I do have a concern at the bore of the aftercooler housing as there is some localized pitting. I will try to get a picture but any rough guidelines as to what level of pitting on the housing bore surface would be problematic?

Tom

[Tom Bartolomei]

Thanks Corey. Will see what condition mine are in once pulled apart. Are those aluminum rings a sort of compression ring?

I also presume that upon re-assembly, all of that should get plenty of grease.

Tom

[Corey Schmidt]

Yes, that is an aluminium ring that needs to be there… we have those in stock if you need them.

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