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[Radar]

Thanks - part ordered on sale or return - picking up this morning.

[TheBoy]

Scuttle off is enough. Still a bit fiddly.

No need to drain coolant, but obviously your hands will get very wet. You will lose a load of coolant doing it. Worth picking up some coolant from dealer as well.

[Andy H]

Changed mine last week.
Took the scuttle off but still couldn't get my hands in comfortably so I took the wiper mechanism out as well. It is held in by 4 bolts. The wiper arms have to come off to get the the scuttle off so it took about 2 minutes to get the mechanism out as well (after I had taken that apparently useless bracket out that screws to the bottom of the windscreen frame).

With enough space to work I was able to swap the HBVs one pipe at a time and I didn't lose any more coolant (the header tank was almost empty already though ).

If the header tank is still full then drain a few pints from the radiator drain (into a clean container) & pour it back in when finished

[Radar]

Thanks!
Got new hbv and coolant - will do in a bit ..... if I don't fall into an afternoon nap!

P.S. Andy I think you need to take your car out for a long drive to say..... Maidenhead, just to be sure its stopped leaking. There is liquid refreshment and indian food waiting for you

[Andy H]

I probably ought to mention that I used to really hate hose clips until I bought one of these


not sure I could have got the HBV done without it

Maidenhead? tempting but not practical. Going to try to lay 100 blocks this weekend without getting sun stroke. An ice cold Cobra would suit me just fine right now  (but I wouldn't lay any blocks........... )

[Radar]

LOL!! Sorry you have got the 2 bob bits

There is a leak from the bottom plastic pipe on hbv (the side which has two pipes - the connecting rubber pipe looks intact) and hbv is off but no cracks visible. Just wondered the bottom pipe on hbv (side which has 2 pipes) is hard to blow through and only very very little air travels - is this normal? Also this pipe has a little layer of dried coolant on the inside (the other 2 hbv pipes run blow through easy).

Is the fact that I cant really blow through the bottom pipe mean its knackered or is it supposed to be like that please?

P.S. Little bit tricky getting those clips off - couldn't find my mole grips so resorted to pliers!

[TheBoy]

get someone to suck on the small outlet on the very top, then see how easy it is

Got the new one on ok?

[chrisgixer]

It is a valve, so one or other is supposed to blocked, depending on the position if vac applied, or not.


Usually, the failure mode is, ime, a leak from the diaphragm disc shape bit in the top. Or along one of the moulded joins.

[chrisgixer]

One of my old posts

http://www.omegaowners.com/forum/index.php?topic=105900.0

[Radar]

Thanks, looks like internal damage is the likely culprit. As I could see no rubber pipe damage I am putting the new one on - two pipes and hose clips in place - last one to go - but it is as mentioned many times a bit fiddly - I want to get it connected tonight and test quickly and leave overnight with card under to see for drips..... if I can get the last one on!

[Radar]

Put it back together and did a little test with no leaks - will check again tomorrow before resealing scuttle.

Thankyou to all who offered advice and support - without it I couldn't have got this far

I found my mole grips (too late now!)

Then my brake pad warning has come on.....and when I went indoors swmbo told me the dishwasher is broken. Another busy day tomorrow with a bit of painting due too!!

[chrisgixer]

Oh she noticed that was broken did she?

[TheBoy]

You may need to top up the coolant over the next couple of days of use, as there will now be small air pockets in the system that will work their way out...

[Radar]

Thanks, sorry I missed your post about sucking the top pipe. Will keep an eye on coolant level.

SWMBO noticed that all was not normal with the dishwasher in double quick time!! Now why is that not surprising Happy holidaying Chris.

Thanks to Andy H for the wiper mechanism tip - I needed to take it out

I hear some members on here have small (and large air pockets that work there way out too!!!! It reminds me of the time when my little one was about 3 months old and I kid you not because I counted them, did 48 "pops" on the trot - that has to be a world record!

[sjc]

I can't get my hands down there without removing the wiper mechanism either.  Did you find you had to run the motor briefly to move the linkages so you could get at the top bolt?

Sounds like you've got it sorted.

My suspicion is that it's lack of use that makes these go faulty - i.e. they never move all winter and then when things hot up and the climate control decides to fully by-pass the heater matrix, suddenly you're operating a valve that's done nothing for months.  Just my suspicion, could be talking mince.