Good morning- I have a Universal m25xp on an ‘87 Cat 30 trbs. For the last month or so when I shut down the engine I can hear water trickling back into the muffler. Shutting the cooling water intake valve stops the trickling. A couple times, when the valve wasn’t closed soon enough, the first spit of water out the exhaust is huge. Yesterday, I found that I had forgotten to close the intake valve and the engine would not turn over. Is it possible for water left between the muffler and the exhaust exit to flow back into the muffler? And in such volume that it finds it’s way back into the exhaust manifold and into the engine? Has anyone else experienced this? Ideas on a cause? Thank you for any insight.