87Mirage,

https://cimg0.ibsrv.net/gimg/www.off...f864b999a.jpeg
https://cimg1.ibsrv.net/gimg/www.off...5c5f03b86.jpeg

I can’t tell you if this segment was between the elbow and the diverter or between the diverter and the tip, or whether it was on the upstream or downstream end, but I do remember seeing it on the port side only, which we all know runs a bit warmer than the starboard. I think I’ve since pitched it, but it seems like I had another segment with even more obvious extrusion of nylon on the end of the hose.

With what we found with the rubber seal disks on the ends of the heat exchanger, and the increasingly warmer running temps prior to the piston failure, a shortage of flow may have been the culprit. I do know the seawater impeller was is near perfect shape when I recently replaced it, so that wasn’t it.

Thanks. Brad.

Swollen heat exchanger end gaskets cause them to run hot so that is a good theory.

87Mirage,

https://cimg1.ibsrv.net/gimg/www.off...ed6276797.jpeg

Is this what you’d call “swollen”? :rolleyes:

I didn’t even know these were a thing prior to the disassembly of the heat exchanger. I’ll be having a look at these every spring from here on out.

Thanks. Brad.

Guys,

While we're on the subject, what's y'all's recommendations for exhaust hose? I see lots of options.

Thanks. Brad.

These work fine

That actually isn't that bad... Thats pretty normal for those heat exhanger rubber seals.. Not saying its good, but I've seen way worse. To be honest, I'm actually shocked nobody has come up with a more resilient solution for this yet as its so common... I wonder if you could make like a waterjet cut piece of silicone?? Might last longer?

On a side note, haven't visited your thread in a while, but I apologize for insighting a catch can riot lol..

AShipShow,

Oh, I'm sure. I'd guess a lot of people don't even realize they are a maintenance item. I didn't.

The one in the pic appears to be just a sheet of neoprene rubber, with no reinforcement. The ones I ordered and installed are nylon (I think) reinforced. I have to think they will last longer. Still gonna check them every spring. It's a pretty easy check, now that I know.

I might check with a seal and packing supplier here in Dayton and see if they've got an option that will be better than what I bought.

Thanks. Brad.

For 10 bucks.. these might be worth trying.. just pop the center hole in it and run it...
Would be interesting to try one on one end and the OEM on the other end and compare after a year.

https://www.mcmaster.com/1084N14/

EDIT: Just saw youre previous post... mind letting me know where you got reinforced gaskets?

AShipShow,

Kevlar reinforced. That's intriguing. I'll see what the local shop has along those lines.

​​​​​​​Thanks. Brad.

AShipShow,

https://a.co/d/1A6q0Kx

Thanks. Brad.