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Old 05-18-2020, 04:54 PM   #1
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Brand: Thor Motor Coach
Model: Hurricane 34J
State: Michigan
Posts: 40
THOR #12625
Hissing sound from engine 2018 f53 2019 hurricane

I know I posted this in another thread, but I think I put it in the wrong place. I don't see how to move it.


Hello. I have a 2019 Hurricane 34j. So it sits on a 2018 F53 chassis. I have about 5k miles on the rig. Friday we started on a 8-hour trip and about 1 hour into the trip every time I press on the gas a really obnoxious howling and hissing sound starts and it gets louder as the engine revs harder and you can hear in the video that it gets really bad as it shifts down. Towards the end of the video you can hear as I level out that it gets quieter. This has never happened before and started again about 1 hour into the trip on Friday. There are no lights or codes and no issues found when I scanned the onboard computer. I looked underneath the motorhome around the engine I don't see anything out of place but I'm not a mechanic. other than it being extremely loud and obnoxious I was able to complete about a 16-hour trip over the course of 2 days. Any help or suggestions are appreciated. Thank you

The video starts with the hissing already pretty loud. Please watch the whole video and again you'll hear what normal sounds at the end of the video.

https://youtu.be/t0brtXYxn2E

Here is another video. You can hear in this video I'm pressing the gas and letting it up repeatedly for demonstration.

https://youtu.be/ZIpKAvN9vbQ
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Old 05-19-2020, 08:20 PM   #2
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Brand: Thor Motor Coach
Model: Hurricane 27K
State: California
Posts: 608
THOR #2544
I have a 2015 27K and I had a noise a year or so ago and what it turned out to be is a wire rubbing on the fan. Not that is your problem but you may want to lift off the dog house and see if you can see anything. Mine was easier to diagnose because it would happen at idle and I could start the engine with the dog house off. I would not, repeat would not try driving it that way.
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Old 05-24-2020, 01:47 PM   #3
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Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 18,613
THOR #8860
Check under the hood for a stray cat...
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