can someone post a pic of what the recovery hose, for the radiator overflow, looks like at the bottle end, preferably out of the bottle.
that is the overflow pipe, not the return pipe thanx.
cheers.
radiator overflow hose
Started by
TerrA LX
, Jan 02 2007 02:07 AM
35 replies to this topic
#1
TerrA LX
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Posted 02 January 2007 - 02:07 AM
#2
REDA9X
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Posted 02 January 2007 - 04:34 PM
Um, I'm confused here. There is only one hose coming from the radiator to the bottle, or are you talking out of the bottle and onto the ground? It's just a piece of plastic hose . Every system looks different from car model, so what specific system are you looking at??
#3
_Monkey_
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Posted 02 January 2007 - 04:43 PM
on my torrie i use a "Jazz" overflow catch.
and on my daily hq i use teh good ol 600ml coke bottle
,works well.
and on my daily hq i use teh good ol 600ml coke bottle
,works well.
#4
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Posted 02 January 2007 - 05:28 PM
looking for the shape of the hose and how far it penetrates in the top of the green lid on the bottle to the ground as mine was missing thanx.
#5
REDA9X
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Posted 02 January 2007 - 08:19 PM
oh you are talking the system available as an option on LX and UC?? There was no hose according to the parts book.
#6
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Posted 02 January 2007 - 08:41 PM
so whats suppose to happen when the bottle fills, just let it spew all over the engine bay?
#7
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Posted 02 January 2007 - 08:51 PM
I guess so...., maybe thats why they have a max fill line??? To stop that from happening.
#8
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Posted 02 January 2007 - 09:45 PM
If we are talking about the container that is the same shape as the windscreen water reservoir ?, there should be lines on it showing the level to fill it to. About 1/3 filled when cold, is about right and should never see the coolant go more than � full, using a 13psi rad cap, would stay lower with higher pressure cap. Off course, if you have a giant motor in there with a big radiator then there is going to be much more coolant pushed in there.
There may be a half inch hole in the top of the cap on the reservoir? On all the torries Ive seen this looks like its been drilled in there afterwards, sometimes when the rad cap first releases it can put out quite a burst and they perhaps did this to stop the lid being blown off the container completely, or perhaps the containers didn�t handle the pressure. They are a bad design with the inlet directly below the lid. Should have been designed with the lid and inlet skewed and then a simple vented cap could have been used. To stop it flying through the hole, I use a piece of foam as a baffle.
As a side note, on one of our torries, we used another windscreen reservoir as the overflow tank, only the lids were different�..well so I thought����10 years down the track��.the coolant would go into the container, but never get sucked back in the rad again, collapsing the hoses etc. After much headscratching the prob was found to be a small mesh filter in the bottom of the reservoir that was clogged, which is only fitted to the washer reservoir
There may be a half inch hole in the top of the cap on the reservoir? On all the torries Ive seen this looks like its been drilled in there afterwards, sometimes when the rad cap first releases it can put out quite a burst and they perhaps did this to stop the lid being blown off the container completely, or perhaps the containers didn�t handle the pressure. They are a bad design with the inlet directly below the lid. Should have been designed with the lid and inlet skewed and then a simple vented cap could have been used. To stop it flying through the hole, I use a piece of foam as a baffle.
As a side note, on one of our torries, we used another windscreen reservoir as the overflow tank, only the lids were different�..well so I thought����10 years down the track��.the coolant would go into the container, but never get sucked back in the rad again, collapsing the hoses etc. After much headscratching the prob was found to be a small mesh filter in the bottom of the reservoir that was clogged, which is only fitted to the washer reservoir
Edited by devilsadvocate, 02 January 2007 - 09:48 PM.
#9
_Monkey_
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Posted 02 January 2007 - 09:53 PM
Use a recovery cap on your radiator and when the coolant cools it will draw the coolant back into your radiator.so whats suppose to happen when the bottle fills, just let it spew all over the engine bay?
#10
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Posted 02 January 2007 - 10:04 PM
ok guys i understand how the system works, im just wondering if the motor gets too hot and the bottle fills, is their suppcse to be a hose from the green cap to the ground or was the bottle designed to overfill and spew over to the engine bay.
im sure there is a few a9x owners who would not appreciate boiling hot coolant infected water spewing all over the engine bay.
anyway, i take it holden never intended the bottle to overfill hence no hose to ground.
i assume someone drilled a hole in my green cap and once had a hose there.
i too will try fit a hose here but need one with a 90deg bend in it to fit properly.
thanx for the responses guys.
im sure there is a few a9x owners who would not appreciate boiling hot coolant infected water spewing all over the engine bay.
anyway, i take it holden never intended the bottle to overfill hence no hose to ground.
i assume someone drilled a hole in my green cap and once had a hose there.
i too will try fit a hose here but need one with a 90deg bend in it to fit properly.
thanx for the responses guys.
#11
_The Baron_
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Posted 03 January 2007 - 11:13 AM
The repco bottle has the overflow pipe from the radiator connected to the bottom (Horizontal).
There is a tapoff point (Vertical) at the top for any excess water to flow out off it. Cut the hole open and fit a tube to this point and pass the tube through the gap in the engine bay side wall.
This is the A9X setup that directs overflow down onto the road and not spewing into your engine bay.
The washer bottle style has it's problems as discussed above.
There is a tapoff point (Vertical) at the top for any excess water to flow out off it. Cut the hole open and fit a tube to this point and pass the tube through the gap in the engine bay side wall.
This is the A9X setup that directs overflow down onto the road and not spewing into your engine bay.
The washer bottle style has it's problems as discussed above.
#12
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Posted 03 January 2007 - 08:00 PM
The A9X one has the overflow, the standard LX one does not, this is the A9X style, the top hose is overflow, the hose at the bottom front is from the radiator
#13
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Posted 04 January 2007 - 08:26 AM
Nice cap.
Yes, I said "overflow" in relation to the discharge from the radiator going to the bottom connection on the bottle. Maybe I should have said radiator discharge.
Yes, I said "overflow" in relation to the discharge from the radiator going to the bottom connection on the bottle. Maybe I should have said radiator discharge.
#14
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Posted 04 January 2007 - 09:55 PM
Yep, it is nice huh, only ever seen one other car that came with the black cap rather than white, this one is original.
#15
_Yella SLuR_
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Posted 04 January 2007 - 10:04 PM
ALX, think you are talking the HQ/HZ overflow bottle. Hose goes in the bottom on those. Some bright spark drilled a hole in the cap on mine right over the inlet pipe in the bottom, so when water does eject from the radiator under pressure, it squirts straight up, through the hole in the cap, and onto the underside of the bonnet!!!!! I must fix that. Just a word of warning if your planning on doing a relief hole in the tank. I actually put one in the back facing towards the panel work (mounts provide enough relief from the panels to let water/air in/out.
#16
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Posted 04 January 2007 - 10:22 PM
Judging by how many of these I have seen over the yeras with a hole drilled in the cap, it makes me wonder if it was done by Holden dealers at some stage... Maybe it's in the service leters somewhere. Seems funny to have an overflow bottle with no relief hole...
#17
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Posted 08 January 2007 - 08:57 AM
The caps had a little rubber grommet in them to try and only let air out and cause the spray of water to bounce back.
I pulled mine out as the smaller hole clogged too easily, the grommet was getting brittle, and the cap kept getting blown open anyway.
I have only seen three of these grommets still in cars, including mine.
I pulled mine out as the smaller hole clogged too easily, the grommet was getting brittle, and the cap kept getting blown open anyway.
I have only seen three of these grommets still in cars, including mine.
#18
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Posted 08 January 2007 - 11:11 AM
Just a dim memory (as most are these days), but I seem to recall seeing at least a few overflow containers with a small groove in the lip that the cap fits on, not in the cap itelf. This would have been enough to let any pressurised air out.I just mean't relief for the air trying to escape/vent when the bottle starts to fill, and allow air back in when the radiator sucks the fluid back in. I don't think they had a hole in the cap at all from new, or if they did, maybe it was simply too small.
#19
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Posted 15 January 2007 - 04:16 PM
as I thought, the holes were drilled out.
This is taken from a service letter:
It has been established that the pressure venting of the radiator coolant reservoir is insufficient and under severe after boil conditions, pressure can build up in the reservoir.
Therefore it is recommended that in service the size of the vent hole in the reservoir cap is increased from .187in. (4.7mm) to .385in (9.5mm).
This change is now in effect in production.
This is taken from a service letter:
It has been established that the pressure venting of the radiator coolant reservoir is insufficient and under severe after boil conditions, pressure can build up in the reservoir.
Therefore it is recommended that in service the size of the vent hole in the reservoir cap is increased from .187in. (4.7mm) to .385in (9.5mm).
This change is now in effect in production.
Edited by tinkers, 17 January 2007 - 04:29 PM.
#20
TerrA LX
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Posted 15 January 2007 - 06:41 PM
thanx for clearing that up guys 
, it just seemed wierd that it would not run an overflow hose to the ground.
, it just seemed wierd that it would not run an overflow hose to the ground.
#21
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Posted 15 January 2007 - 07:35 PM
Yeah, it definately didn't, the service letter also shows the fittment and parts required when it became an option
#22
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Posted 15 January 2007 - 07:38 PM
I have a genuine one of these overflows on mine and it has the same lid as the washer bottle (even has the washer symol on it) and only has a tiny 1mm hole in it. They must have just chucked these same lids on when making the last batches or something.
My coolant capacity is pretty big (16L) and the overflow tank is only just big enough by about 1/2L so I have to be careful not to overfill or it does spray everywhere. Was more of a prob in Canberra where the engine saw a 15 degree larger variation from cold to hot and I did manage to overfill it once, not a problem in Brissy though. Still didn't pop the cap off when I did overfill it though, just sprayed a bit of alien blood around.
I would imagine the boil over scenario is where you would run into problems (as mentioned above) as during normal warm up, the coolant expands slowly anyway.
Enders, mine didn't have that grommet when I bought it from Holden.
M@
My coolant capacity is pretty big (16L) and the overflow tank is only just big enough by about 1/2L so I have to be careful not to overfill or it does spray everywhere. Was more of a prob in Canberra where the engine saw a 15 degree larger variation from cold to hot and I did manage to overfill it once, not a problem in Brissy though. Still didn't pop the cap off when I did overfill it though, just sprayed a bit of alien blood around.
I would imagine the boil over scenario is where you would run into problems (as mentioned above) as during normal warm up, the coolant expands slowly anyway.
Enders, mine didn't have that grommet when I bought it from Holden.
M@
Edited by Toranamat69, 15 January 2007 - 07:39 PM.
#23
TerrA LX
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Posted 15 January 2007 - 07:48 PM
Toranamat69 can i have a pic of your overflow hose thanx.
#24
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Posted 16 January 2007 - 11:12 PM
ALX76,
I'll get a pic for you tomorrow.
M@
I'll get a pic for you tomorrow.
M@
#25
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Posted 16 January 2007 - 11:15 PM
^ cheers
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