kev_corsa
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Registered: 7th Nov 02
Location: Newport, Uni in Bristol
User status: Offline
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Does anyone know how these work exactly? (as in techinally)
Also, can they be removed from the subframe safely on the Corsa C?
cheers 
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Adam-D
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Registered: 11th May 02
Location: Cheshire
User status: Offline
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ive removed them from my b
if there the same its dead easy
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1600power
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Registered: 22nd Apr 04
Location: Shropshire Drives: 1.6 16v Sport
User status: Offline
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quote:
Originally posted by kev_corsa
Does anyone know how these work exactly? (as in techinally)
Also, can they be removed from the subframe safely on the Corsa C?
cheers
basically a sensor is built into the car somewhere (like a shock sensor on a cd player) and when their is a serious jolt as in a collision it sends a signal to the safety componants in the car (dependent on severity of the jolt) to release. so for a lightish impact you might find that only the tensioners go, if its a more serious jolt then you will find the airbags and tensioners deploy.
The tensioner itself is simply a loaded barrel, when a signal arrives at the tensioner to release a small canistor inside it explodes pulling the seatbelt buckle down the chamber thus pulling the buckle very tight and forcing the seatbelt to restrain immedietly.
Once its gone off its useless and will need to be changed if it is to remain a safety feature of the car.
With regards to changing them they should be a piece of piss, 4 bolts at most will hold it to the subframe of the seat and are very easy to exchange for an "ok" unit
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glennpanton
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Registered: 30th Jul 01
Location: west sussex
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haha we were letting em off at work saab ones had a recall on em i think
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ed
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Registered: 10th Sep 03
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Didn't think that pre-tensioners were electronically controlled because there are no wires going into them. They just go off when there is a large enough impact, hence the reason they are pretty dangerous and you have to put the safety tab in before you do anything at all to them.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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quote:
Originally posted by 1800ed
Didn't think that pre-tensioners were electronically controlled because there are no wires going into them. They just go off when there is a large enough impact, hence the reason they are pretty dangerous and you have to put the safety tab in before you do anything at all to them.
True - highly tensioned spring in the barrel, with a retainer set to break when sufficient decelerative G is applied, ie when you crash. Spring deploys, pulls steel cable which yanks down the buckle into the seat assembly, and thereby tightening the belt and lessening the risk of you chewing steering wheel for example.
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