BimmerFest BMW Forum banner
1 - 6 of 6 Posts

·
Nuclear engineer
02/2012 X5 35d M57Y CPO 121K miles NOKIAN WR G3 30K miles
Joined
·
23,970 Posts
There is not a BMW objective timing chain replacement criterion or interval.
 

·
Registered
Joined
·
170 Posts
Discussion Starter · #3 ·
I was quite sure about this answer, anyway, my engine is reaching +360000Km and I was just wondering if at some point I should be worried about this.
I know that timing chains last weeeeell longer than timing belt, but we can’t say they are lifetime after all … isn’t it ? … or maybe I’m wrong ? :ROFLMAO:
 

·
Nuclear engineer
02/2012 X5 35d M57Y CPO 121K miles NOKIAN WR G3 30K miles
Joined
·
23,970 Posts
There is another user here with comparable mileage on a diesel. I do not recall him ever mentioning his timing chains.

When does the timing chain need to be replaced?
Updated: March 01, 2020
[ … ]
A timing chain doesn't need to be replaced unless there is a problem with it.
[ … ]
In a well-maintained engine, a timing chain can last up to 300,000 miles or even longer.

 

·
Nuclear engineer
02/2012 X5 35d M57Y CPO 121K miles NOKIAN WR G3 30K miles
Joined
·
23,970 Posts
Roller chains wear at each pin joint, multiplied over the length between driving and driven cogwheel may become significant in valve timing. Wether or not this is apparent to eye or ear is problematic.

Again, BMW provides no criterion that I know of.

The usual problem reported by BMW owners is failure of the slack side tensioning device or failure of the tensioning guide.
 
1 - 6 of 6 Posts
Top