mondeo sci timing chain jumped again
19-07-2010, 09:39 PM
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mondeo sci timing chain jumped again
new to this forum but been in buisiness for 20+ years (renauot specialist) hopefully someone can help
i have a customers mondeo sci (rare thing i know) and it came in with jumped timing chain so fitted new kit inc tentioner and happy days until 10 miles into road test it cut out and no restart, brough back to workshop to strip rocker back off and find timing chain slack again. low oil pressure you would think so stripped sump off and checked big ends for signs of low oil pressure all seems fine not even a slight mark to indicate low oil pressure. when it was running after new chain fitted engine sounded perfect.
anyone got any ideas where to go next?
if anyone has a sci engine for sale also get in touch
cheers in advance
mal
i have a customers mondeo sci (rare thing i know) and it came in with jumped timing chain so fitted new kit inc tentioner and happy days until 10 miles into road test it cut out and no restart, brough back to workshop to strip rocker back off and find timing chain slack again. low oil pressure you would think so stripped sump off and checked big ends for signs of low oil pressure all seems fine not even a slight mark to indicate low oil pressure. when it was running after new chain fitted engine sounded perfect.
anyone got any ideas where to go next?
if anyone has a sci engine for sale also get in touch
cheers in advance
mal
20-07-2010, 10:22 AM
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As I used to work in a ford main dealer in Birmingham we did come across this , twice in fact , both higher mileage engines , I think from memory we did chain , tensioner , pulleys and pump , the first one we looked at the possibility of just doing the minimum as the customer asked us to do for cost reasons , but once we had compared all items it was decided that the only way to do it was to replace all .
The problem we believe started with the normal chain stretch , that in normal circumstances would be catered for with the tensioner , but then once these got to maximum adjustment it started to damage the sprockets and eventually jumped a tooth .
Both these cars we did were not used as they were intended by ford , the sci was designed for motorway use where they could return very good fuel consumption at constant cruising speed , both were ex lease cars that had been sold into private hands and used just around town , probably sold with the idea that they would return good consumption figures even though around town they were terrible to drive , little power and not very flexible . This we believed contributed to the problems .
Hope this helps .
The problem we believe started with the normal chain stretch , that in normal circumstances would be catered for with the tensioner , but then once these got to maximum adjustment it started to damage the sprockets and eventually jumped a tooth .
Both these cars we did were not used as they were intended by ford , the sci was designed for motorway use where they could return very good fuel consumption at constant cruising speed , both were ex lease cars that had been sold into private hands and used just around town , probably sold with the idea that they would return good consumption figures even though around town they were terrible to drive , little power and not very flexible . This we believed contributed to the problems .
Hope this helps .
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