Club 80-90 Forums

On a 2.1 injection there are plastic sleeves on the fuel pipes in the engine bay
I have never seen them on a 1.9 carb.

Anybody know the purpose?
I'd have thought they make it harder to inspect pipes.
If they are heat resistant then why does a 1.9 not need them?

thanks

To prevent expansion under pressure (the pipes may get softened with engine heat)? Only thing that I can think of offhand. Do the injections run at higher psi after the pump compared to the carb models?

Yes higher pressure I think but these sleeves are loose so not for expansion I'd think

Only other possible reason then is preventing chafing by wires/pipes but they wouldn't stay in the required position being loose. Another VW mystery.

could be chaffing, anybody know for sure?

It could be to stop chaffing or possibly to help protect from touching anything hot but I would be more inclined to think that it is there because in the event of a pinhole developing in a hose, with a fuel pressure of over 3 bar you would end up with a very fine mist of fuel filling the engine bay, at least with the conduit over the hoses the fine mist would be contained.

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Itchy what are the 2x inline fuel things for??

not see them before thanks

Simon

dumbo wrote:Itchy what are the 2x inline fuel things for??

not see them before thanks

Simon

No idea I was given this, says fuel saver so maybe a filter.

MGP wrote:It could be to stop chaffing or possibly to help protect from touching anything hot but I would be more inclined to think that it is there because in the event of a pinhole developing in a hose, with a fuel pressure of over 3 bar you would end up with a very fine mist of fuel filling the engine bay, at least with the conduit over the hoses the fine mist would be contained.

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Good suggestion.

ok just never see before cheers mate

dumbo wrote:ok just never see before cheers mate

here is a close up

MGP wrote:It could be to stop chaffing or possibly to help protect from touching anything hot but I would be more inclined to think that it is there because in the event of a pinhole developing in a hose, with a fuel pressure of over 3 bar you would end up with a very fine mist of fuel filling the engine bay, at least with the conduit over the hoses the fine mist would be contained.

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this pic of a DJ engine bay shows a pipe unsleeved which implies pin hole spray is not the reason

Fuel save.Snake oil more like :-)I'm suprised you have not come across one of those before.

Rob, you have a 2.1, do you have the sleeves or are they long gone?

itchyfeet wrote:could be chaffing, anybody know for sure?

Heat sleeves I believe, had them on my 1.9 injection on the hoses across the top of the block. Not imperative but keep them on if you have them I'd guess. Can be a nightmare to thread the fuel hose through them when they're old and pinched though [DISAPPOINTED BUT RELIEVED FACE]