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[Darth Loo-knee]

There you go then Albs get the pipe swapped around then Happy Days

[albitz]

I will have to spend a bit of time making certain that I havent got my wires crossed, I only had a quick poke around today. What Phil and Kevin are saying makes sense in one way, but the car has been running fine with its current plumbing setup until a few weeks ago, which doesnt add up to me, if it was plumbed wrong from installation it should have had the problem since day one. Which is why I want to do a more thorough check of my findings.I will try to do this tomorrow and report back.

[Darth Loo-knee]

I will have to spend a bit of time making certain that I havent got my wires crossed, I only had a quick poke around today. What Phil and Kevin are saying makes sense in one way, but the car has been running fine with its current plumbing setup until a few weeks ago, which doesnt add up to me, if it was plumbed wrong from installation it should have had the problem since day one. Which is why I want to do a more thorough check of my findings.I will try to do this tomorrow and report back.

Ok lately it has been quite hot weather so have you had the heaters on cold? or air con on? in which case the water would be cold going to your evapourator (hope I am right here as I hate Gas  ). So when you turn on your heaters to Hi the LPG would then work properly

[Lazydocker]

If all else fails, we'll meet up early next week and have a look see

[feeutfo]

Your evaporator has been plumbed in incorrectly!

Agreed. Some muppet has plumbed it in after the HBV so it only gets coolant flow when the climate is calling for heat.

All installs we have DIY'ed we have plumbed the vapouriser between the outlet on the coolant bridge and the HBV so it gets flow regardless of whether the heater matrix is in the circuit or bypassed.

Kevin

Aaeye, coolant bridge too vap, vap to hbv.

[feeutfo]

Your evaporator has been plumbed in incorrectly!

Agreed. Some muppet has plumbed it in after the HBV so it only gets coolant flow when the climate is calling for heat.

All installs we have DIY'ed we have plumbed the vapouriser between the outlet on the coolant bridge and the HBV so it gets flow regardless of whether the heater matrix is in the circuit or bypassed.

Kevin

Aaeye, coolant bridge too vap, vap to hbv.

As it is now, the vaporise cooling will depend entirely on the hbv settings which are controlled by the climate control. Fiddle with the climate, and the hbv can turn off cooling to the vap.

[Kevin Wood]

As it is now, the vaporise cooling will depend entirely on the hbv settings which are controlled by the climate control. Fiddle with the climate, and the hbv can turn off cooling to the vap.

Yes, and remember that the climate panel will use the heater in conjunction with the air con to achieve the correct temperature, since the air con is not controlled. It's only in the hottest weather that the climate panel would shut off the HBV completely, hence the problem only occurs sporadically.

Kevin

[feeutfo]

As it is now, the vaporise cooling will depend entirely on the hbv settings which are controlled by the climate control. Fiddle with the climate, and the hbv can turn off cooling to the vap.

Yes, and remember that the climate panel will use the heater in conjunction with the air con to achieve the correct temperature, since the air con is not controlled. It's only in the hottest weather that the climate panel would shut off the HBV completely, hence the problem only occurs sporadically.

Kevin

And would sun sensor alter it with no input from the driver?

[albitz]

Right then - I have taken the plenum and fanimold off so that I can see whs what and have observed the following.
1. The pigs tail pipe which comes from the coolant bridge and goes into the HBV from the n.s hasnt been cut into in any way, it is as original.
2.The lower pipe which comes out the o/s of the HBV splits into two.One goes off to the back of the engine  under the coolant bridge,the other goes through the bulkhead to the matrix (presumably)
3.The upper pipe which comes out of the o/s of the HBV goes into the side of a cylindrical shaped thing (dont know what its called ) which has an electrical plug attached to the bottom and another pipe which comes out of the top and goes to the evaporator (it is  the lower of the three pipes on the face ofthe evaporator) the middle of the three pipes on the evaporator is the LPG supply to the injectors. The upper pipe  has a tee, one side of which goes to the coolant expansion tank, and the other side to the transfer pipe.
I presume that this isnt quite right and I need to take a pipe off the "pigs tail pipe and connect this to where the HBV upper pipe goes at present ? and then reconnect the HBV pipe to where it originally went. Not sure from memory where that is but im sure there is a pic. somewhere.
Does the rest of the plumbing sound ok or will that need changing also ? :-/
Where can I buy tee connectors etc to alter the plumbing ? cant imagine Hellfrauds selling such things. :-/

This may have become apparent because unlike most people I rarely have the climate control switched on, I prefer to put the window down and have some fresh air, I only use it on LO if its reall hot, and since I got the car it hasnt been cold enough to need to use it for heat. If JCB and the previous owner were like most people and normally had the CC on and just adjusted the temp to suit, then they may never have known there was aproblem.

[Kevin Wood]

Sounds like someone's made a right pig's ear of that, but, importantly, the evaporator is fed after the HBV, so it will only get a feed when the heater matrix has hot water.

Sounds like they've had problems getting it to bleed as well, and added a tee up to the expansion tank.

The unidentified cylindrical device is the aux. coolant pump for the winter pack, by the way.

I have a drawer full of "T" pieces. If you want a couple PM me your address.

Having said that, the reason I have a drawer full is that we found it's best to do it another way on the Omega and hence don't use the ones that come in the LPG kits!

On all Omegas that have been DIY converted with Teilo's kits we have intercepted the pipe fr5om the coolant bridge to the HBV and fed this via the vapouriser and left everything else original (except I removed the coolant pump).

Kevin

[Kevin Wood]

If you could take a photo of the plumbing it might make it easier to explain how to make it right.

Kevin

[albitz]

I will try and take some pics and upload them Kevin (a major task for a tecnoretard like me) it may have to wait until tomorrow now as I need batteries for the camera which involves a trip of a few miles to a shop which sells them.
Thanks for the input so far, Im wondering if I should be patient until LD has a chance to have a look, but you know how it is when you start  into something, you want to fix it before putting it all back together.

[aaronjb]

Halfords sell big boxes of T-pieces, Y-pieces and pipe joiners up to (if I recall) 19mm in size.. at least in large Halfords, they do.

[Lazydocker]

I will try and take some pics and upload them Kevin (a major task for a tecnoretard like me) it may have to wait until tomorrow now as I need batteries for the camera which involves a trip of a few miles to a shop which sells them.
Thanks for the input so far, Im wondering if I should be patient until LD has a chance to have a look, but you know how it is when you start  into something, you want to fix it before putting it all back together.

You're welcome to stick it all back together and wait 'till I can make it down but I would just get on with it

You need to intercept the "Pig's Tail" pipe, take it to the lower of the coolant inputs at the Vaporiser and then return from the higher one to the HBV. Then repair the other pipes. Re-fill and bleed... Job done

[albitz]

I agree LD, now Ive got this far I might as well try and finish the job.It sounds reasonably straightforward, I think its been overcomplicated the way its been done. If I get stuck I will try to upload some pics for advice.
One question - when I take the coolant return from the upper outlet on the vapouriser to the HBV where do I connect it on the HBV ? back into the "pigs tail pipe" or into one of the pipes coming out the other side ? and if its one of those two do I tee it into the upper or lower one? :-/
Looking on the bright side I have done an "interim" tidy up of the wiring etc. today. I have moved the ECU down underneath where the air filter sits (near the bagpipes and bottom rad hose) its the only place I could see to put it for the moment without shortening some wires and lengthening others. I have rerouted quite a few wires and hidden some out of the way so there isnt an enormous bundle of wires cable tied together in front of the cambelt cover.This will also allow the air filter housing to be able to sit on its mountings which it wasnt doing with the ECU stuck in between it and the expansion tank.
I also fixed the leak at the LPG tank last week which has not only got rid of the farty smell in the car, but it seems to have noticably improved consumption, which had been slowly getting worse and I didnt know why.