Quote:
Originally Posted by 60041
I pulled an old seat belt buckle to bits to see exactly how it worked.
When the tongue is inserted, a small pawl engages in the slot in the tongue and locks it in. When the release button is pressed, it pushes a wedge shaped piece of plastic down which, in turn, allows the metal pawl to move clear and release the belt tongue.
What was happening with my seat belt was that years of accumulated dirt and lack of lubrication was making the pawl stay engaged when the button was pressed.
The PTFE I used was WD40 Specialist Dry Film PTFE which I bought from Wickes for about £3; it should be easily available in places like Halfords or diy shops.
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Thanks for the tip. Just got a 2011 Volvo with a fair few miles (and no doubt dust in the mechanism too) and both front buckles need a push to get them to release. Just went to dealer for something else and mentioned this, and he said 'have you tried lubricating'. I've got a spray can of silicon lubricant around here somewhere, so will give it a go when I get the car back.