I found an online version of the service manual It states that the official procedure for setting the valve timing after belt replacement is to undo those three screws, insert the timing tools, and then re-tighten. The fact you lost all three screws on one cam instead of just one, suggests to me that a step was missed.
wow look at the state of the castle nuts on the main pulley spindle and the pulley that got the bolts missing looks to me like someone has used a hammer and drift to undo them. I'm no expert and I know the belt in the pick has been rubbing on something, but they don't look like new belts there shit up, as is the area around them, I took my covers off mine a few weeks ago I got my belts change at 15k miles I'm on 25k now and it's almost spotless under the belt covers, just a very fine film of black dust but nothing like the crud on your casings. I'd argue they have not been changes recently.
Agreed, I think they might even have tried to check the tension of the old belts and not retightened those bolts.
Yes somethings not right there. That is a helluva mess for a "recently serviced" engine. I'd be wondering why the pulley nuts are hammered. Whatever, under the current Sale of Goods act and Trading Standards laws, I believe the dealer is responsible for failures up to 6 months from the date of the sale. It would be worth checking.
The pulleys looks like a type of vernier pulley for fine adjustment of the timing when a new belt is fitted. Not inventing the wheel here but when fitting any cambelt you always make sure the side without the cambelt tensioner is tight with no slack. The slack & tension is then taken up with the tensioner and if the 2 cams are locked at TDC you undo the 3 capscrews then the pulleys can move round to take up the slack that is left while the cams are still locked in the TDC position ..... my 2 pence worth is capscrews dont just come out ! Id say they was done up by the factory and scanned in saying they were tight as they would have had dry "medium" or high strength "red" loctite applied from the maker of the capscrew. If the belts have been changed im guessing someone has forgot to tighten them back up but that's only my 2 pence worth ....
Yes agree , I can understand lots of dust in there if belts have been running up against the bolts that probably fell down to the bottom of the covers and were generally doing a dance around the covers . The belts just don't look like 1000 miles old , I would say on the cam pulley that the bolts fell out of that the bolt at 1 o'clock fell out first , then the bolt at 9 o'clock was second leaving the one at 4 o'clock holding last , that's just a deduction from the amount of ' chatter' on that outer steel plate .....as more bolts fall out the remaining take more chatter . I actually thought that the cam pulley would of fell off but looking at the set up the vernier wheel is in board of the cam so it's just free to spin around but not fall off . Regards locktite .....remember, locktite does not hold the bolt it's just extra security , I have done loads of car cam belt jobs over the years and loads of them from factory do not have locktite on crank pulleys ,cam gears , tensioner , jockey pulleys and so on but they do not just fall out , someone's made a boo boo there ......
