barney 0 Posted December 28, 2007 Hi all, I'm in the middle of turning my 205 1.6 gti into a race car and currently rebuilding the engine. Had an odd one tonight though, went to time up engine and remove cambelt but the dowel holes don't line up. Crank pulley hole is about 12 o'clock with 10mm drill through it and the top pulley is past its hole. The engine seemed to be running fine before I removed it so just wondered if anyone has had similar problems. I can put some pics up if it helps and also some pics with head off. I reckon bottom end is definately right as all pistons are in middle of block. The problem is that when I rebuild it, naturally I would time it up off the dowels but could this be wrong??? (I know in theory it can't but its bit of a strange one ! Oli Share this post Link to post Share on other sites
djinuk 2 Posted December 28, 2007 could it be that the heads had a heavy skim ?, just a thought, Share this post Link to post Share on other sites
barney 0 Posted December 28, 2007 Should still be timed right though? Share this post Link to post Share on other sites
wardy18 33 1 Cars Posted December 29, 2007 are you sure that one side of the webbing on the block hasnt broken off and so you've got the timing dowel the wrong side of the webbing if you see what i mean?! was ur ignition timing very retardted or advanced to counter act the incorrect cam timing?! Share this post Link to post Share on other sites
pug_ham 244 3 Cars Posted December 29, 2007 If the head has anything skimmed off the timing holes won't line up perfectly like they should. A heavy skim can make up to half a tooth difference. With the lower timing belt covers fitted you can't get the wrong hole on the crank pulley as theres another hole in it that matches the crank pulley hole when its in the right place. Graham. Share this post Link to post Share on other sites
barney 0 Posted December 29, 2007 Its a long way out, will try and post a picture if I can, got some on my mobile phone. Oli Share this post Link to post Share on other sites
simonb 0 Posted December 30, 2007 If it was running OK and seemed quick then leave it where it is. If you line it back up afterwards, you will notice a fairly large power drop due to the cam being retarded. And as a result, your ignition timing will be retarded by the same amount. Share this post Link to post Share on other sites
barney 0 Posted January 2, 2008 I've built loads of 205 engines before etc just never come across problem. Its about 3-4 teeth out, will try and get photos up tonight. Oli PS- Has anyone got their engine apart at the moment who can tell me with the timing holes lined up where the pistons and vavles are, what cycle their on. Think my bottom ends right, all pistons are level. Share this post Link to post Share on other sites
steve@cornwall 100 Posted January 2, 2008 maybe being a bit daft here, but don't they only line up 1 revolution out of 4 ? Share this post Link to post Share on other sites
barney 0 Posted January 2, 2008 1 of every 2, hence why you always turn an engine over twice after fitting cambelt, thats ratio between crankshaft and camshaft. Cheers, Oli PS- Niether lined up but this way was closer than other. Share this post Link to post Share on other sites
simonb 0 Posted January 2, 2008 (edited) The cam and crank were obviously not lined up when the belt went on although at 3/4 teeth out, I'm supprised that the car ran at all as that would surely have caused some valve and piston contact??? Edited January 2, 2008 by simonb Share this post Link to post Share on other sites
fletch 0 Posted January 30, 2008 Does the crank pulley have a bonded rubber section with the timing hole outboard of the rubber? If so the rubber may have slipped round and youll need a new pulley. Share this post Link to post Share on other sites
pug_ham 244 3 Cars Posted February 2, 2008 Does the crank pulley have a bonded rubber section with the timing hole outboard of the rubber? No, the crank pulley is all metal so it can't have slipped like you suggest. Graham. Share this post Link to post Share on other sites
simonb 0 Posted February 3, 2008 Are you sure that the stock pulleys have been fitted or are they different? how about a couple of pics? Share this post Link to post Share on other sites
