Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Abiton on 18 November 2009, 21:23:01

Title: Guts of the HBV
Post by: Abiton on 18 November 2009, 21:23:01

Just wondering, has anyone dissected one of these pesky Heater Bypass Valves to see how they work and analysed the various possible failure mechanisms?

I'm guessing its a vac-powered flap valve, but never having seen one, except the outside of them in pics, I'm intrigued.

Someone must have taken a hacksaw to a duff one?

Title: Re: Guts of the HBV
Post by: Andy B on 18 November 2009, 22:11:54

There's a diaphragm inside that the vacuum pulls or not pulls to divert water one way or t'other. The diaphragm perishes.  ;)

Title: Re: Guts of the HBV
Post by: Abiton on 19 November 2009, 13:00:43

Thanks Andy, I'm sure you're right.

I was hoping to go into a bit more detail about how it comes to leak, whether the thing can jam in the 'no heat' state, etc.

Anyone got a duff one I could have a go at?
Happy to pay the postage.

Title: Re: Guts of the HBV
Post by: Kaycee on 19 November 2009, 15:15:22

im sure there are loads of duff ones about should get one from your local breakers

Title: Re: Guts of the HBV
Post by: footloose on 19 November 2009, 16:20:11

Mine got so encrusted due to the last owner not putting enough antifreeze in . it got stuck.
You don't need to hacksaw it if carefull i think you cn get it apart without too much damage.