Author Topic: noisy little thing, isn't it? (Read 3571 times)

KyleTaylor · « **on:** June 23, 2008, 08:57:19 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 · « **Reply #1 on:** June 23, 2008, 08:59:09 PM »

Timing chain instead of a belt.

peerless · « **Reply #2 on:** June 23, 2008, 09:14:21 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 · « **Reply #3 on:** June 23, 2008, 09:25:31 PM »

Quote from: peerless;51884

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 · « **Reply #4 on:** June 23, 2008, 09:27:39 PM »

yea, mine ticks alot...kinda pisses ya off after a while.

Sam Cogley · « **Reply #5 on:** June 23, 2008, 11:11:20 PM »

Mine's quiet as a mouse. Exhaust buzzes a bit.

KyleTaylor · « **Reply #6 on:** June 24, 2008, 04:25:59 AM »

Quote from: Sam Cogley;51904

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 · « **Reply #7 on:** June 24, 2008, 03:29:43 PM »

Quote from: KyleTaylor;51912

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 · « **Reply #8 on:** June 24, 2008, 07:58:02 PM »

Quote from: Sam Cogley;51944

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 · « **Reply #9 on:** June 24, 2008, 08:12:15 PM »

Quote from: KyleTaylor;51958

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 · « **Reply #10 on:** June 24, 2008, 08:27:09 PM »

Quote from: Sam Cogley;51962

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.