- Re: !!!FIXED!!!Re: Vauxhall Tigra 1999 X14XE Hard Starting!!!FIXED!!! Archived Message
Posted by Darren Bamford
on October 12, 2008, 10:37 am, in reply to "Re: !!!FIXED!!!Re: Vauxhall Tigra 1999 X14XE Hard Starting!!!FIXED!!!"
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Hi Mike quote: "but it CAN affect the position of the cams as it is like making the belt longer or stretching it." Not really , this would be commentated for when the belt was tensioned. The Camshaft alignment is set before the belt goes on. Quote: "Isn't this the reason why a lot of manufacturers now don't key their shafts instead going for a taper fit pulley/gear/sprocket? The design method for floating gears is to increase timing belt life and a reduction in timing belt noise. Because the gears are floating they can move freely, when the belt is tensioned this allows a equal tension to be applied around the complete belt run. Once the tension is complete the gears are then tightened to the shafts. when the gears are keyed onto the shafts it is very difficult to get a equal balanced tension on the cam-belt. The more complex the belt run is on modern DHOC engines the greater the problem. This can lead to over tension problems that will reduce belt life and produce more belt noise. |