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Omega Help Area => Omega General Help => Topic started by: Mart280 on 04 December 2012, 19:04:18

Title: Thermostat gone ? HBV ?
Post by: Mart280 on 04 December 2012, 19:04:18
Hi chaps, my Mig has been taking 30-40 minutes to get any heat going, the temp gauge is the same as it always is at 85-90 iirc, I assume it's the stat but have seen some people mentioning HBV, any advice welcome.
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 04 December 2012, 19:10:03
Doesn't sound like stat.

Try it with the vac to HBV disconnected.
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 04 December 2012, 19:19:59
Not likely to be the stat ! crikey glad I posted thought it was 99%, I'm just looking at the HBV removal guide, http://www.omegaowners.com/forum/index.php?topic=90574.0 it's up under the scuttle then, bit awkward to get to by the look of it, but the vaccum pipe I need to disconnect is the one arrowed in the pic.
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 04 December 2012, 19:23:08
If the gauge reaches approx mid point on the gauge within 2-3 miles, the stat is OK.

HBV vac is the small pipe on the top
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 04 December 2012, 19:29:34
Right thanks, I will repport back when I get the chance to disconnect vac pipe, probably over weekend, can I disconnect it without removing scuttle ?
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 04 December 2012, 19:34:44
Right thanks, I will repport back when I get the chance to disconnect vac pipe, probably over weekend, can I disconnect it without removing scuttle ?
I can, but then I've done it before. Basically, it is possible, but really tight/fiddly first time around
Title: Re: Thermostat gone ? HBV ?
Post by: tigers_gonads on 05 December 2012, 10:35:28
Don't forget to bung up the vacuum pipe with a piece of tape or a small screw  ;)
These engines don't like vacuum leaks  :)
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 05 December 2012, 19:31:07
Ok so disconnect vacuum pipe and bung it up, what am I looking for after ? should my heating work ? and if it does do I need a new HBV.
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 05 December 2012, 20:05:36
Ok so disconnect vacuum pipe and bung it up, what am I looking for after ? should my heating work ? and if it does do I need a new HBV.
1 step at a time ;)

If that works, you have a vac problem, that we can advise on :y

If it doesn't, I reckon you'll be flushing the heater matrix :(
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 08 December 2012, 15:26:07
My mate came round today and he got his hand in and pulled off the vac pipe(it's still off) we sealed it up but it didnt seem to make any difference to the heating, those pipes that come out of the bulkhead are hot though, so whats the consensus chaps ?
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 09 December 2012, 12:33:36
I see there are plenty of heater related threads as the weather gets colder :) am I looking at a matrix flush guys or possible HBV change or maybe something else ?
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 09 December 2012, 16:54:17
I would probably be thinking of a matrix flush....
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 09 December 2012, 16:56:56
Ok cheers, I think I saw a guide for that I'l have a look.
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 09 December 2012, 17:01:49
Ok cheers, I think I saw a guide for that I'l have a look.
Unless someone near you has decent code reading facilities, might be worth checking what the climate panel thinks the temps are...  ...although on HI, I think it should ignore temps, and just try to heat as much as possible
Title: Re: Thermostat gone ? HBV ?
Post by: Gaffers on 11 December 2012, 12:23:21
You can also get your hands on the metal pipes which feed the heater matrix through the firewall.  It's fiddly but possible.  If they are not as hot as the coolant in the engine bay (with the vac tubes off) then you definitely need to flush.  If they get hot in line with the engine bay then you need to look at the heater electrical system :y
Title: Re: Thermostat gone ? HBV ?
Post by: Marks DTM Calib on 11 December 2012, 12:26:36
Do check the climate control actuator rods are connected as per the maintenance guide
Title: Re: Thermostat gone ? HBV ?
Post by: Mart280 on 12 December 2012, 14:37:39
Do check the climate control actuator rods are connected as per the maintenance guide

What guide is that part in ? i've had no luck searching for climate control actuator rods.
Title: Re: Thermostat gone ? HBV ?
Post by: RobG on 12 December 2012, 17:01:36
Do check the climate control actuator rods are connected as per the maintenance guide

What guide is that part in ? i've had no luck searching for climate control actuator rods.
Same for both sides http://www.omegaowners.com/forum/index.php?topic=90575.0
Title: Re: Thermostat gone ? HBV ?
Post by: TheBoy on 12 December 2012, 18:45:45
Do check the climate control actuator rods are connected as per the maintenance guide

What guide is that part in ? i've had no luck searching for climate control actuator rods.
Same for both sides http://www.omegaowners.com/forum/index.php?topic=90575.0
As with all guides, if anyone does this, please take pics and send them to us :y