Is a M42 timing chain preventative replacement needed?

[e30vertbag]

Hi total noob here.

I keep reading that the timing belt and tensioner on an E30 should be replaced as soon as you get your hands on one.

Does the same apply to a 318i vert with an M42 and a timing chain instead of a belt?

Thanks,
vertbag

[82eye]

Hi total noob here.

I keep reading that the timing belt and tensioner on an E30 should be replaced as soon as you get your hands on one.

Does the same apply to a 318i vert with an M42 and a timing chain instead of a belt?

Thanks,
vertbag

the guides should be checked for wear at some point. they go out earlier than the chain and can cause all sorts of havoc. other than that a chain is generally better a belt.

[superj]

And also your hydraulic tensioner could start losing pressure and allow the chain to start rubbing inside the cover. If you start hearing a weird sound like something that is rubbing but raises and lowers rpm, as the engine does, put a new hydraulic tensioner in. It's very easy to do from the passenger side of the engine bay.

I had an m42 with over 250k miles in it when I bought it, 10 years ago. Your engine will last a very long time if you do the oil changes and normal maintenance on it.

[82eye]

And also your hydraulic tensioner could start losing pressure and allow the chain to start rubbing inside the cover.

good call. totally forgot about that. i'd replace that as a wear item for sure.