Spent a good part of an hour with me checking the belt on a Zed which I had already pulled apart. The belt was fitted and removed at least 4 times, the end result was that marks would not line up after a few revolutions of the crank and was agreed that something was not right with this particular belt. He has taken the belt with him for further test to be run in Melbourne. Hope to have more info soon. Thanks Emmanuel
Good follow up.. Any indications as too whether or not its an isolated incident or a whole batch of them? Has the Rep had any other complaints or heard of any?
do you agree that if the dayco belt has the same number of teeth as the OEM nissan one then after 2 turns of the crank they both HAVE to line up the way they first started? The only way they will not line up is if they are jumping a tooth due to the tensioner not being set correctly?
the way i saw it it seemed the tooth pitch was different, same teeth, but dayco was stretched kinda. dunno, saw it quite a while ago.
You'll need to turn the crank a possible 684 times to line the markings backup. Number of Teeth on Crank Sprocket = 25 Number of Teeth on Cam Sprockets = 50 Number of Teeth on Timing Belt = 59 + 76 +24 + 45 + 24 = 228 So every time you turn the crank one full turn (360 degrees) the belt will move 25 teeth. For the oil pump housing mark and crank sprocket mark and timing belt mark to line up, given that you started turning the crank with everything lined up it will take 684 turns of the crank. 1st turn of crank -> 25 teeth advanced from lining up 2nd turn of crank -> 50 teeth advanced from lining up 3rd turn of crank -> 75 teeth advanced from lining up .... 9th turn of crank -> 3 teeth behind lining up So every 9th turn of the crank makes the marks track back 3 teeth but the cam gears will be out of phase (180 degrees) on every odd number turns of the crank. So double that to get the cam gears in phase with crank and you have every 18th turn makes the marks track back 6 teeth. i.e. multiples of 18 will make the crank a further 6 teeth behind from lining up. 18th turn of crank -> 6 teeth behind lining up now double that: 36th turn of crank -> 12 teeth behind lining up double again: 72th turn of crank -> 24 teeth behind lining up double again: 144th turn of crank -> 48 teeth behind lining up double again: 288th turn of crank -> 96 teeth behind lining up double again: 576th turn of crank -> 192 teeth behind lining up add 18 turns and 6 teeth behind: 594th turn of crank -> 198 teeth behind lining up add 18 turns and 6 teeth behind: 612th turn of crank -> 204 teeth behind lining up add 18 turns and 6 teeth behind: 630th turn of crank -> 210 teeth behind lining up add 18 turns and 6 teeth behind: 648th turn of crank -> 216 teeth behind lining up ad 18 turns and 6 teeth behind: 666th turn of crank -> 222 teeth behind lining up add 18 turns and 6 teeth behind: 684th turn of crank -> everything lined back up.
I assume you are referring to a correctly fitted & aligned belt >>> >>> lining up with spocket/timing marks and any belt markings made by the workshop? Gavin Wood has 5 x 100k services this week alone, another 1 next week. I was interested to see a new timing belt fitted yesterday & the OEM belt marks do not align with sprocket markings. Note: Gavin (& Brett) have been working on Zeds since early 90's
