grimbalo Posted February 2, 2013 Share Posted February 2, 2013 I have a 2001 Focus 1.8 Zetec. Can someone please tell me if valve/piston contact will occur on this model if the timing belt fails, resulting in valve damage. I have been told that some Focus engines have this problem but the 1.8 Zetec doesn't Quote Link to comment Share on other sites More sharing options...
FOCA Posted February 2, 2013 Share Posted February 2, 2013 I have a 2001 Focus 1.8 Zetec. Can someone please tell me if valve/piston contact will occur on this model if the timing belt fails, resulting in valve damage. I have been told that some Focus engines have this problem but the 1.8 Zetec doesn't This can happen on all modern engines, petrol or diesel, (that have valves) apart from rotary or two-stroke engines (as they don't have valves) Quote Link to comment Share on other sites More sharing options...
btmaldon Posted February 2, 2013 Share Posted February 2, 2013 My understanding is that the 1.8 and 2.0 engines are non-interference, but only when turned by hand. If the belt snaps at anything above 1500 revs, the inertia and variability of the timing will bring the valves and pistons in to contact. Quote Link to comment Share on other sites More sharing options...
artscot79 Posted February 2, 2013 Share Posted February 2, 2013 The 1.8 will make contact if the belt snaps at 1000rpm or more even at idle it usually knackers 2 valves minimum Quote Link to comment Share on other sites More sharing options...
stef123 Posted February 3, 2013 Share Posted February 3, 2013 The 1.8 will make contact if the belt snaps at 1000rpm or more even at idle it usually knackers 2 valves minimum I would expect a minimum of 4 valves damaged. 2 of the pistons are going to be in the same position, albeit on different strokes so 2x inlet and 2 exhaust valves Quote Link to comment Share on other sites More sharing options...
artscot79 Posted February 3, 2013 Share Posted February 3, 2013 Smart !Removed! lol you know what i meant Quote Link to comment Share on other sites More sharing options...
grimbalo Posted February 3, 2013 Author Share Posted February 3, 2013 Thanks. I have 5 replies, I think and all agree that valve damage will occur. I guess I'd better get the belt replaced. Thanks again to everyone. Quote Link to comment Share on other sites More sharing options...
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