Engine failure / timing chain slipped

[Toby B]

well, since the thread's back-
pulled head at 179k due to a failed black plastic water pipe,
and the majority of the chain components are fine.  
The vertical rail on the tension side, however, had lost adhesion to the metal-
how much longer it would have gone is anyone's guess.
And all the solid plastic tensioners were very brittle.

So my take is that they probably would have come apart pretty soon...
I'm replacing all the plastic, and leaving all the metal (except the tensioner)
because, well, the car was $600...

fwiw,

t

[Balkanac]

can someone post a photo of good and bad cam gears please?
I took my cover off a month ago but im not sure what good teeth are supposed to look like

[bmwman91]

My oil pump sucked a chunk of timing chain around 150k. I bought it w/ 140k miles on it & the PO had really let the timing assembly go. Pieces of chain roller broke off & fell into the oil pan.

A couple of upper oil pan bolts had also fallen out, and that could have lead to an oiling system failure if I hadn't put them back w/ some Loc-Tite.

[Balkanac]

So noone has a photo of bad gears??

[-318is-]

So noone has a photo of bad gears??

google is your friend

[flyinglizard]

If you bent the valves the lifters wil be loose as the valves dont come allof the way up. Either way you will need to pull the head.
The rings and bottom end  last a long time( 500k)  with synthetic oil. Not so much with crap oil.