Hi Shaun you said to get in contact with you if I needed more help with my focus I replaced the timing belt but as you said I think it's done it's damage to the head. so can you give me the head's up on how to take the head off the motor I've got all the right tools for the job including the torx bits which are for the timing gear pulleys and other bits but I've never done something this techincal before. again thanks for any help you can give me. and I hope to hear from you soon
Mark all the caps (cams) clearly punch them so you are sure they will be installed in the same order. Pull off exhaust manifold. Remove all injector plugs and wiring (look carefully) remove cams. Remove cam followers Carefull one lot is different to the other side take note and mark them.remove head bolts-remove head.The head should be sent to a specialist, to save money you could supply the valves and the gasket set. Should be available from any good after market spares outlet. My advice is to use new head bolts. Torques differ engine to engine but normally I use 20nm + 40mn + 90 degrees + 90 degrees but please check specs for your vehicle.While the head is off check condition of pistons, if all the valves took a hiding so did the pistons (could be collapsed) get someone to look and give you advice, could save money in the long run. Not such a bad job to pull the sump and do a proper job anyway. Also get your injectors checked/cleaned if you can afford it- usually a problem on these motors. Sorry for slow reply been ill. Let me know - Shaun
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You have a contact or interference engine. This means that there is not enough room between the top of the piston when it is all the way up for the valves to be open. What happens is they get hit by the piston and they bend or break. You will have to take the head off and send it to an engine rebuilder. MAKE SURE they know Volkswagons or you will likely be taking the head off again and sending it back out. Normally valves and valve guides need to be replaced, you are looking at about $1200-$1500 for a proper job. Also you will need new head bolts, VW head bolts are not deisigned to be reusable. (Been there, done this). You might be better off looking in a scrap yard for a replacement engine. , or a head.
You can go to autozone.com and register for FULL FREE online repair manual with diagnostic codes, diagrams, testing, replacing, part locations, and much much more. I can look them up but need the year of your focus
Most mechanics would pull the spark plugs and check the compression in the cylinders, but usually anyone with a trained ear can tell by the sound of the starter when cranking against the compression of each cylinder. Many of the smaller engines today have valving designed so that when they are out of time, the pistons interfere with them. That means two objects try to take up the same space at the same time and at minimum the valves bend. Worse case scenario would be upper head/camshaft damage and possible piston damage. That's pretty severe. You won't know until you get the valve cover off or maybe deeper. Hope that helps.
I would suggest you contact an authorized daewoo dealer or service center and ask the service department this question. As you are probably aware some engines are free wheeling (valves will not contact pistons regardless of cam/crank relation) and some are not.
Firstly if the belt went you probably have bent valves. However if you want to assemble and see remove cam belt covers,remove crank pulley (could be tricky if you don't have an air tool ) remove tappet cover ( you may have to remove the throttle body to do this) Get some flat bar approx. 6mm thick and 400 to 500 mm long. You will see that on the gearbox side of the cams there are slots in the end. Remove the plugs and put a screw driver ( long ) down the hole, any one, and turn the crank untill the piston is roughly half way down the bore. Turn the cams until the plate will sit on the head and slot into the cams thus locking them. The slots are offset so you will have to play around until the plate slides in easy. Then loosen the cam gears untill you can spin them by hand, but not so loose that they are falling off. Put your long screwdriver or preferably a dial guage with extensions into no 1 plug hole turn the engine untill the piston is right at the top. Loosen the tensioner and push it back against the spring and lock it fit the new belt right to left then let the tensioner go. Check play on longest side of belt it should move about 6mm. lock the tensioner. Tighten the cam pulleys and remove plate. turn the engine one full turn clockwise and check belt tension- adjust if neccessary. turn one full turn again and make sue plate slides in when no. 1 piston is on top. Then do a compression test to see if you have bent valves. If the compression test is ok. reassemble and drive away. If not (the exhaust valves are normally bent) you are half way to taking the head off. In which case contact me and I will walk you through it. Good luck Shaun