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View Full Version : noisy little thing, isn't it?

KyleTaylor
06-23-2008, 10:57 PM
I have owned several BMW's in my short life, but this has to be almost the loudest engine I have owned.

The m10 was louder with 400k miles.

What makes the m42 engine so loud? I am talking about valve train noise.




KT
Wise Old Dog
06-23-2008, 10:59 PM
Timing chain instead of a belt.
peerless
06-23-2008, 11:14 PM
Shouldn't have any valve train noise, but the chain can put out a 'whine'.

But if its clattering away then you most likely have some kind of issue, like low oil pressure or worn out chain components maybe.
KyleTaylor
06-23-2008, 11:25 PM
Shouldn't have any valve train noise, but the chain can put out a 'whine'.

But if its clattering away then you most likely have some kind of issue, like low oil pressure or worn out chain components maybe.

It's valve noise. I want to learn more about swapping to the 94 - 95 DOHC head. And freshen one up to put it on.
xwill112x
06-23-2008, 11:27 PM
yea, mine ticks alot...kinda pisses ya off after a while.
Sam Cogley
06-24-2008, 01:11 AM
Mine's quiet as a mouse. Exhaust buzzes a bit.
KyleTaylor
06-24-2008, 06:25 AM
Mine's quiet as a mouse. Exhaust buzzes a bit.

What is the mileage? I have a feeling the guides are just worn out or the lifters are getting weak. Mine has over 150k...
Sam Cogley
06-24-2008, 05:29 PM
What is the mileage? I have a feeling the guides are just worn out or the lifters are getting weak. Mine has over 150k...

81k. If the guides are that worn out, I'd do a chain/guide replacement before the engine grenades.
KyleTaylor
06-24-2008, 09:58 PM
81k. If the guides are that worn out, I'd do a chain/guide replacement before the engine grenades.

I am looking for a lower mileage one anyway...
Sam Cogley
06-24-2008, 10:12 PM
I am looking for a lower mileage one anyway...

150k isn't really high mileage for a BMW engine. As long as nothing else is wrong with it, I think I'd just replace the worn parts.
KyleTaylor
06-24-2008, 10:27 PM
150k isn't really high mileage for a BMW engine. As long as nothing else is wrong with it, I think I'd just replace the worn parts.

I realize that. My e36 325is had 158k... I figured it would be cheaper to replace the engine with a lower mileage m44 instead of replacing lifters and the tensioner and chain. That is with no labor cost.