Expansion Tank Removal

[jonb_5 6]

Hi

 

This might be a daft question but can you remove the expansion tank? Would you be able to just run but topping up the radiator?

 

Thanks

 

Jon

[cheesegrater 43 1 Cars]

May I ask why you'd want to in the first place? It simply wouldn't work.

[Mark Greenwood 0]

no, the system needs room for... expansion...

 

as the coolant and gases within heat up from ambient temp to running temp they expand, and require a larger area.

If not given the additional expansion space, the system will become pressurised above normal putting you at risk of blowing a hose off, or blowing a water gasket somewhere..

 

you could addopt a 106 gti / saxo vts radiator which has the expansion bottle built onto the side of it to save space.

Im not sure of the hose outlets in comparison to a gti rad though, I havnt got one of each here to check..

[jonb_5 6]

Ok thank you.

Is there one you can get which is maybe smaller and more discreet?

Thanks

jon

[welshpug 1,661]

you may be able to get an alloy one, but tbh its a system that works just fine and doesnt add any massive amount of weight.

[harryskid 193]

May I ask why you'd want to in the first place? It simply wouldn't work.

 

Just to make a point older engines never had expansion tanks !

[Daviewonder 533 3 Cars]

This is true but there was space left in the top of the rad for expansion due to the rad top being the highest point in the system?

[welshpug 1,661]

yup, in effect the top of the rad was the expansion tank.

[harryskid 193]

This is true but there was space left in the top of the rad for expansion due to the rad top being the highest point in the system?

 

Quite right Dave and they relied on the pressure cap!

[cheesegrater 43 1 Cars]

Just to make a point older engines never had expansion tanks !

But it still had a cap to release pressure I'd assume!

[jonb_5 6]

Hi

 

I really want to create some space in the engine bay and have seen another 205 running the fuel tank in where the header tank is and it looked really neat.

 

This looks like a neat solution, you could re-root the hose higher at the back of the engine and fit this, therefore keeping the topping up point above the engine.

 

http://www.cbsonline.co.uk/product/In-Line_Radiator_Filler_Neck_25mm_INF25

 

Your opinions would be great,

 

Thanks

 

Jon

[ORB 227 1 Cars]

I'm confused!

 

What's wrong with the fuel tank in the boot or under the floor??

[dee205 3]

I don't fancy the idea of a fuel tank under the bonnet. Would be a right mess if you had a vapour or liquid leak.

[Daviewonder 533 3 Cars]

Be a bit small wouldn't it?

[cheesegrater 43 1 Cars]

Surely it would also handle terribly?

[GLPoomobile 958]

Maybe someone else can remember, but didn't Dan Taylor do this on his '6 conversion? I definitely remember him fitting one of those in-line fillers posted above, which IIRC was situated sort of above the gearbox and towards the front. It'll be in his built topic - look in the projects forums, his username is Taylorspug. Quite an old project topic though.

[Paul_13 212 1 Cars]

Where has Taylorspug dissapeared to? Hasnt been around for a while

[SurGie 54]

Bored now from looking at his signature

[S@m 156]

Hi

 

I really want to create some space in the engine bay and have seen another 205 running the fuel tank in where the header tank is and it looked really neat.

Jon

 

I think there is some confusion afoot here, because swapping the expansion for a (tiny) fuel tank would not create any room whatsoever. (apart from under the boot floor.) Then theres the safety concerns amongst other issues.

[jonb_5 6]

Hi

 

No confusion at all, I want to create space so I can move the fuel tank.

 

By having it in the car I would have to build a safety enclosure around it so again adding more weight. By having it in the engine bay I have no lines running from front to back, fuel or wiring, again adding weight.

 

The fuel tank, you are right is small. Maybe 5 litres, it doesnt need much to get up a hill in 40 odd seconds and come back down again.

 

I will be moving the coil aswell to where the washer bottle used to be, once both of these are moved there would be plenty of room for the fuel tank.

 

The move of fuel tank will be fine, i just wondered if anyone had any experience of the product I posted and if it will actually work as intended.

 

Thanks

 

Jon

[luke1987 5]

Is this the sort of thing you had in mind Jon?

 

http://www.ebay.co.uk/itm/peugeot-205-1-9-gti-under-bonnet-alloy-fuel-tank-race-/110728830742

[jonb_5 6]

Hi

 

Yes the tank will go against the bulkhead, however the one I have looked at is a cylinder - roughly 8" in dia and 14" long.

 

Jon

[jorg 11]

Sorry to barge into your thread but I found the idea of removing the expansion tank very interesting. I have been through Dan Taylor's conversion thread many times but never spotted the expansion tank missing even though it was highlighted many time.

 

 

Would the set up in the picture above work? Dan seemed pretty confident in his thread that the idea works but I couldn't find a diagram to how he did his. I know the system works well as it is but if it was possible to simplify and gain a bit of space that would be great.

[cybernck 402 1 Cars]

Personally, I wouldn't run an engine without an expansion tank.

 

 

Here's a better idea IMHO:

 

http://forum.205gtidrivers.com/index.php?showtopic=112060&view=findpost&p=1010400

[luke1987 5]

That is a good idea but on a right hand drive wouldnt the brake servo be in the way of routing the pipe work and on the left the fuel tank would be in the way.