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[tigers_gonads]

I removed mine when I fitted the Lpg Kit 2 years ago. (gave me more space to play with)

I know that my heater matrix is starting to get restricted so i'm looking to improve the flow at low revs by re fitting the pump 

Which way the water flow through the pump ?
Anybody got a picky of which pipe it goes on and which way ?

I've had a sleep since I removed it and can I hell as remember 

[tigers_gonads]

Looking at H21's guide here   http://www.omegaowners.com/forum/index.php?topic=90533.0

I can see the pipes but not sure which one to cut.
My pipes have been moved about to plumb in the vapouriser
Anybody with a V6 fancy poping outside and having a look for me please 

[Kevin Wood]

The easiest place to put it will probably be in the feed to the vapouriser as the original pipework will probably have been removed along with the pump. It does depend how your vapouriser has been plumbed in, though.

FWIW, I removed mine when I converted to LPG and noticed no difference in heater performance whatsoever.

[tigers_gonads]

The easiest place to put it will probably be in the feed to the vapouriser as the original pipework will probably have been removed along with the pump. It does depend how your vapouriser has been plumbed in, though.


FWIW, I removed mine when I converted to LPG and noticed no difference in heater performance whatsoever.

Iirc, I basicly removed the pump, extended the pipes and connected it to the vapouriser which seems to work ok 
Trying to work out which pipe is "in" and which one is "out" without pulling the pipes off the vapouriser or removing the scuttle / plenum too trace it by hand 


I know what your saying Kev 
I know the matrix is pretty clogged up with crap so i'm just hopeing to boost the flow a little at low revs    Just trying to avoid cutting holes in the dash to change the matrix 

When your driving at a fair speed with the revs above 2000, its not  bad at all but when your sat in traffic or doing 30 mph in 5th (just over 1000 revs), its bloody freezeing 

[tigers_gonads]

Now sorted (I think)

Cheers Daz (loo knee)   

[feeutfo]

Those little pumps are puny at best, and only affect heater performance while engine is off. It allows the heater to circulate residual heat while sat in the car with engine off,  afaik.

Also, the usual way to plumb the vap is to fit it inline, between the coolent bridge outlet  and the hbv. So flow is from bridge > vap > to hbv and the rest as normal.

If the matrix is blocked, and I'm hasey on the plumbing post hbv, I can't see the tiny amount of flow that pump provides making much odds tbh.

I wired one up to a battery once, there's not much to it. Plus the wiring extras, As the car wiring won't activate it with engine on as I understand it. ...?

[tigers_gonads]

Those little pumps are puny at best, and only affect heater performance while engine is off. It allows the heater to circulate residual heat while sat in the car with engine off,  afaik.

Also, the usual way to plumb the vap is to fit it inline, between the coolent bridge outlet  and the hbv. So flow is from bridge > vap > to hbv and the rest as normal.

If the matrix is blocked, and I'm hasey on the plumbing post hbv, I can't see the tiny amount of flow that pump provides making much odds tbh.

I wired one up to a battery once, there's not much to it. Plus the wiring extras, As the car wiring won't activate it with engine on as I understand it. ...?

Wirings already there Chris 
Just sticking it back where it was to see if it makes any difference 

At the end of the day, the matrix is pretty much blocked so really needs replacing if I can't get the sludge to move 
The missus has 2 days off in a row next week so i'm going to drain the matrix, stick a couple of pipes on it and hold them "high level" so I can fill it with fernox for a couple of days to see if I can loosen some of the crap in there 

Question anybody .................. has anybody blasted compressed air threw the matrix before ?

[feeutfo]

Those little pumps are puny at best, and only affect heater performance while engine is off. It allows the heater to circulate residual heat while sat in the car with engine off,  afaik.

Also, the usual way to plumb the vap is to fit it inline, between the coolent bridge outlet  and the hbv. So flow is from bridge > vap > to hbv and the rest as normal.

If the matrix is blocked, and I'm hasey on the plumbing post hbv, I can't see the tiny amount of flow that pump provides making much odds tbh.

I wired one up to a battery once, there's not much to it. Plus the wiring extras, As the car wiring won't activate it with engine on as I understand it. ...?

Wirings already there Chris 
Just sticking it back where it was to see if it makes any difference 

At the end of the day, the matrix is pretty much blocked so really needs replacing if I can't get the sludge to move 
The missus has 2 days off in a row next week so i'm going to drain the matrix, stick a couple of pipes on it and hold them "high level" so I can fill it with fernox for a couple of days to see if I can loosen some of the crap in there 

Question anybody .................. has anybody blasted compressed air threw the matrix before ?

as said wiring from the car, I am almost cirtain, runs with engine off/ignition on/heater on. Is that what your planning...? The flow from that won't touch a blockage if the flow from the much beefier engines water pump can't shift it.


I'd go with flushing option, defo.

[tigers_gonads]

Cheers Chris 

Any danger in giving the matrix a blast of compressed air after i've softened up the crap in there with a dose of fernox ?
Will the matrix take the pressure or am I liable to knacker it completely ?

[albitz]

Imo compressed air might easily blow a hole through the matrix.A safer option would be a hose with reasonable pressure,particularily if the crap in there has already been softened by fernox.

[feeutfo]

If there's is some flow I would be happy to blow it through.

If no flow at all, unlikely I know, then no for fear of too much pressure.


I wouldn't give it full beans from a compressor, short blasts, personally.


What symptoms are you getting?  How is vap plunbed in ?
Wondering if the LPG plumbing to vap could be affecting heater?

[amba]

From my experience last year,if the matrix is really blocked no ammount of chemicals or flushing will get it back to its original condition.

The pipes are so thin that even if you get it to a point where you have a constant flow through it with a hose you might only just be pushing it in and then back out just the very first part of the pipework.

If you want heat to be restored best advise is fit a new matrix...sounds drastic  but if you go the cheats way and are carefull you will end up with an almost invisible repair and be certain that the heater will work well.

From start to finish removing the old matrix and replacing it along with cutting bits takes around 2-3 hours tops.Both metal feeds into the matrix will require new rubber "0" rings which are stupid money  from VX but essential to getting it sealed properly.New matrix is around £40 so proper heating should be restored for sub £60 including coolant flush and washers.

If you go that way you then know its all working properly ready for the cold spell.

[tigers_gonads]

Albitz ...........  Water pressure round here is poo    Especially at the end of a 40 foot hosepipe 
Wouldn't blow a cobweb away 

Chris ...........  Yes, they is some flow. Once you get up to a fair speed for a while, its not too bad but as soon as your back in traffic and the fans are on (pre facelift / no climate) then its freezing within 30 seconds.
Its been 2 years worth of sleeps since I did the plumbing for the lpg but i'm pretty sure the vapouriser water feed came straight of the back of the coolant bridge at the back of the block.
No problems running on gas other then the low voltage fault that does my head in now and again 

Amba ................. Thanks for the prices 

[2woody]

the pump is part of the "winter pack" - an options pack supplied with the car from new. The pump improves the heater by actively pumping coolant through the matrix in addition to the main coolant pump. It means that the heater is better, as it gets more flow ( the pump runs any time the ignition is on ) plus it gives the ability to pump coolant through the heater with the ignition off.

with the vapouriser installed in the heater circuit, you WILL get a faster warm-up for the LPG system and a more effective heater than with the LPG system on its own.