think like said yours was a slip and light clips of valves so would say the bearing would be fine, that said while something is out and not to expensive to replace i would but thats just me,, i do a lot of petrol cooper s engine rebuilds through the years and have had times where only done what i could see to find later down road it should of had more replaced while i was in there,, as bearing set £60 extra, but if put back together and a few thousand miles down road found had a wear issue low oil pressure and believe me you will regret that £60 never spent at that point when you have to pull it all a part again,,Thanks Mike - I wonder if I got away with less damage because the chain jumped rather than snapped. Wouldyou change the white metal bearings anyway if you were me, or leave well alone?
yes timing covers or any surface to surface parts like oil pumps and etc,,, and the ELRING do a really good grey sealant for sumps it goes off very hard when engine warms up so dont break off and no risk of collecting the rubber in oil ways etc,, only ever put just enough to seal something as when join surfaces together the over spill can cause big issues, hence the welseal stuff is thin and can use it on head gasket with a sponge but i dont and clean both surfaces spotless clean then wipe with thinners just before dropping head on , also also ways light grease or oil head bolts and always clean out the threads beofre as any oil or water in bolt holes will contamination the gasket and can crack block when engine gets hot ,, and it cant get out of the pressurise thread holes from the bolts as such, all the little things make a differenceAlso Mike is the wellseal only for the timing chain cover?
YEs - the chain was broken - my suspicious mind is thinking the mechanic cut it as it was just the link on top and the guides are ok - however maybe contrary to that theory the tensioner which is visible is damaged - it popped in half by the looks of itNot sure how the timing chain can snap & not damage rockers etc. perhaps Mike will know. Looking at mine the valves are not angled in the head, they open vertically so if the piston clobbers it, rather than the valve bend all the force is directed straight up through the valve hence broken rockers, housing & bent camshaft etc. (which is exactly what happened to mine). I'd be interested to know what you find when you pull it apart. Probably a stupid question but now you have the cam cover off, can you see the that chain has actually is snapped?
guess should go buy a lottery ticket with luck like that,, it must of just placed the camshaft at a very rare point when nothing was total open and the spring tool the hit maybe,, right ball ache of job,, i notice there are timing chain for them engines on ebay that have link that is clipped and there is a trick where pressure the tensioner spring back and feed to new chain through but thats only the top chain ,, might find someone has tried this approach not a good way forward on many levels,,It seems odd there’s no damage to the rockers etc. If the chain snaps some of the valves have to be left in the open position & get hit by the pistons? Anyway, I would suggest removing camshafts etc. & glow plugs, do the leakdown test & just check the engine does actually rotate by hand. Mike’s more knowldgable than me so might be worth seeing what he says.