[alpinaconvert]

Does my F48 X1 have a timing chain or belt? When should it be replaced?

[00max00]

It's a timing chain. No replacement required.

[alpinaconvert]

Thanks for the quick response.

[Beagler]

What about chain tensioners?

[Jorix]

Originally Posted by 00max00

It's a timing chain. No replacement required.

Don't agree with the no replacement part tho. Even chains should be replaced around 200k kilometers/ 125k miles.

[//TMT]

The chain and tensioners are all completely internal and are one heck of a job to replace. You may consider them "lifetime" parts, from an economic standpoint. They are definitely not something to replace preventatively.

[Jorix]

Originally Posted by //TMT

They are definitely not something to replace preventatively.

Tell that to the N47/57 engine owners

[//TMT]

Fair enough. I'd love to know the book hours for this job

https://www.newtis.info/tisv2/a/en/f...aft/1VnYseXYlY

Especially these:

Necessary preliminary tasks:

Remove engine with transmission
Remove transmission
Mount engine on assembly stand
Remove flywheel
Remove cylinder head
Remove oil pump
Remove rear timing case cover

Half a day max, right?

[RobinLegin]

Originally Posted by //TMT

Fair enough. I'd love to know the book hours for this job

https://www.newtis.info/tisv2/a/en/f...aft/1VnYseXYlY

Especially these:



Half a day max, right?

Looks rather like my 1955 Alvis Grey Lady. The timing chain and tensioner is nicely and handily located between the engine and gearbox!

[00max00]

Originally Posted by Jorix

Don't agree with the no replacement part tho. Even chains should be replaced around 200k kilometers/ 125k miles.

125K miles sounds premature. I had a Nissan Maxima with over 200k miles, everything else was falling apart but the timing chain. Everywhere I read was that the B48 was better designed. It was not performance tuned, I would expect this would help it last longer.