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Propex exhaust racket!
Posted: 17 Mar 2009, 10:03
by barney
Hi Folks
I'm after some advice from all you propex users.
I've just fitted a propex heater and I'm a bit surprised by the noise out of the exhaust.
It sounds really uneven - if that makes sense, like a car exhaust with an uneven tickover.
From inside the van it reminds me of trying to sleep at a music festival with a bassline rumbling away!
Is this normal?
Should I maybe try shortening the exhaust?
Has anyone tried fitting a silencer to their exhaust?
Am I just too light a sleeper?!
Ta for any advice
Barney
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 10:54
by Titus A Duxass
I've just fitted mine and it's relatively quiet.
I didn't change the length the pipes that came with the kit.
We don't intend using it when sleeping.
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 11:08
by Gunslinger
If I remember correctly the inlet and exhaust pipes should be the same length, ie balanced. But not sure if that would cause the symptom you describe
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 11:46
by jamesc76
Is it new ??? How much gas in the bottle etc?
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 12:01
by barney
Yeah - tis new...and I will be giving propex a shout, but just wanted to make sure this exhaust humming/burbling wasn't normal.
No problem with the sound coming from the actual box itself - just the exhaust.
Full bottle of propane...but it's just occurred to me that maybe the regulator is shafted - could that account for uneven gas flow into the unit and out the exhaust...or is that unlikely?
Thanks folks
Barney
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 16:05
by T'Onion
Have you got it clamped up correctly ? sounds like its vibrating , trying getting underneath it and seeing if you can see if it loose anywhere , remember the exhaust gets hot very quickly
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 16:19
by barney
Inlet and exhaut pipes are both secure, facing the correct way and the recommended distance from each other.

Re: Propex exhaust racket!
Posted: 17 Mar 2009, 18:46
by T'Onion
so is it noisy with the exhaust on ?
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 19:45
by barney
Yes, it's noisy with the exhaust on...like the exhaust gas is coming out unevenly. Not making a spluttering sound or anything really loud, just an uneven rumbling.
Does that sound normal or should the exhaust be giving a more constant note?
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 19:53
by gti mad man
im sure they dotn have to be the same length
well it does have a van in it so will whirr a bit
you could try mounting it on rubber mountings if its a vibratrion
Re: Propex exhaust racket!
Posted: 17 Mar 2009, 23:24
by matty o
mine does the same sounds like a didgeridoo i was told it was normal.
Re: Propex exhaust racket!
Posted: 18 Mar 2009, 06:27
by Titus A Duxass
matty o wrote:mine does the same sounds like a didgeridoo i was told it was normal.
That's what mine sounds like (great description Matty), but I wouldn't call it loud.
You can hear it in the van but the fan is louder.
Re: Propex exhaust racket!
Posted: 18 Mar 2009, 16:10
by barney
mine does the same sounds like a didgeridoo i was told it was normal.
Yep - that's the noise described perfectly.
Guess I'll just have to get some ear-plugs or drink a lot more beer too make me sleep through it!
Ta for all your help folks.
Barney
Re: Propex exhaust racket!
Posted: 18 Mar 2009, 17:40
by kevtherev
I find it a hypnotic drone.