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martin jones
martin jones, UK Car Mechanic
Category: UK Car
Satisfied Customers: 723
Experience:  25 years as a mechanic and mot tester, owned own business for 10 years city and guilds trained
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Vauxhall astra hi im trying to reset the valve timing on my

Customer Question

hi im trying to reset the valve timing on my astra 1.9 cdti 2005 model double overhead cam. after a cambelt failure, when trying to insert the location tools to lock the cams only one will locate into the slot on the cam the other one does not line up its about half inch out. ive tried this with the rocker cover off the car so i can visually see this. is this normal or do the cams need realining. also prior to this when i had reasembled the rocker top and cambelt and set the crank timing with the crank alinement tool i tried to turn the engine over manualy. after a couple of rotations the engine would lock, im now puzzled to see why this is, all valves look good have replaced all the rockers, im now stumped.
Submitted: 6 years ago.
Category: UK Car
Expert:  martin jones replied 6 years ago.
Hi and welcome to, i will try to assist you with your problem,would you like me to put up full instructions plus pictures of the cam belt replacement procedure, regards martin.
Customer: replied 6 years ago.
yes instuctions and pictures would be good. plus info on the cam alinement
Expert:  martin jones replied 6 years ago.
Hi ok thanks for that, please give me about 10 mins to upload the info for you, regards martin.
Expert:  martin jones replied 6 years ago.
here is the first 2 pictures, for some reason they did not come out, kind regards martin.
Customer: replied 6 years ago.
thanks for the pictures, but i still need to know wether both locking pins should engage in in the exhaust camshaft and inlet camshaft at the same time, as when the locking pin is in the exhaust cam the pin in the inlet cam does not locate in its slot,
Expert:  martin jones replied 6 years ago.
Hi there, yes both pins should be locked in place, as you state that you can not turn over engine, this confirms that your valve timing is out, you have piston to valve contact, if you read on the installation procedure at points 13/14 you will see that you have to place tool in hole, then whilst turning over the engine the pin will locate, if the other pin wont go in, you must have that sprocket out of align, hope this helps, kind regards martin.PS, once all cams are correctly positioned make sure that you can turn engine over by hand to make sure the valves are not touching the pistons, all the best martin.If you need further help please ask.
Customer: replied 6 years ago.
just one more thing is it possible for the cams to move out of alinement as they are interconnected by two sprocket gears, these show no signs of damadge so cannot figure out how they can become out of line many thank paul
Expert:  martin jones replied 6 years ago.
Hi there,in theory no, they should not of come out of align, but line up all the other sprockets as per pictures, check and double check, all the best martin.