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The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 06-05-2019, 08:22 AM   #1
roman-dude
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valve adj - can one tell by listening? (also vanos q)

Need to replace a leaky valve cover gasket so asked about doing the valve adj at the same time. The shop owner at a reputable shop tells me "I listened and you don't need it" (obv before opening anything up). Not to dismiss his expertise but sounds strange to me.

Also asked him to take a look at the vanos while there (don't think I need it but figured he could check for the loose bolts) and got "just wait for the codes".

Your take? thx!
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Old 06-05-2019, 10:06 AM   #2
ewcmr2
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Within normal valve clearance range you can't hear anything.
I'd bet it's his experience telling him valve clearance moves very little with mileage/wear. That said, with valve cover off, it would be less than a hour labor to check them. And if any shims need changed the S54 design makes it easy (don't have to remove cams like many engines)
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Old 06-05-2019, 11:43 AM   #3
Dogthebountyhunter
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I would trust him. He could have charged you and not even changed anything if they didn't need adjusting. Seems honest to me. I'm curious as to what they sound like when they need adjusting
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Old 06-06-2019, 08:28 PM   #4
Cayne23
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I would bet an audible difference in valve tick. Do it yourself. If u can add/subtract, u can do it. Buy the ktm shims. Dame hardness and size incriminates. Half the cost
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Old 06-07-2019, 11:07 AM   #5
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yeah, going to do that with a friend who has the garage and the tools.

I would imagine that one would want to make the adjustments before there's noise, esp since it's recommended every 30k miles.

I was also put off by him telling me that the spark plugs were a "1-1.5 hr job" when I asked how much it would cost to replace those since the valve cover would already be off.
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Old 06-07-2019, 11:16 AM   #6
Cayne23
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Originally Posted by roman-dude View Post
yeah, going to do that with a friend who has the garage and the tools.

I would imagine that one would want to make the adjustments before there's noise, esp since it's recommended every 30k miles.

I was also put off by him telling me that the spark plugs were a "1-1.5 hr job" when I asked how much it would cost to replace those since the valve cover would already be off.
Thats bs. U only have to take the plastic cover off, then pop off the coils and there u go. No need to remove the vc. And if he already in there it should be easier. U should do the adjustment yourself. I do mine every 15k. Its easy
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Old 06-07-2019, 11:22 AM   #7
roman-dude
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Thats bs. U only have to take the plastic cover off, then pop off the coils and there u go. No need to remove the vc. And if he already in there it should be easier. U should do the adjustment yourself. I do mine every 15k. Its easy
you mean no need to take off the vc for the plugs, right? coz unless I am missing something I don't see how you don't need to take that off for the valve adj.

ty
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Old 06-07-2019, 01:44 PM   #8
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Yes, the plugs. For the va, u need to remove the vc. It should only take about 30 min to remove the vc if its your first time. Dont forget to buy replacement crush washers for the oil return line going into the side of the vc. U need 2, but buy extra cuz u can drop one when re installing
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Old 06-07-2019, 02:03 PM   #9
roman-dude
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Yes, the plugs. For the va, u need to remove the vc. It should only take about 30 min to remove the vc if its your first time. Dont forget to buy replacement crush washers for the oil return line going into the side of the vc. U need 2, but buy extra cuz u can drop one when re installing
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Old 06-08-2019, 05:24 PM   #10
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"Wait for codes" on vanos is recipe for disaster and codes will only show up with 40% of vanos issues. Cam bolts and chain guide can not be examined without taking vanos apart. You need to address the slack in oil pump holes (get a redrilled one) even if both tabs are intact, and pull the whole vanos apart to do cam bolts. Then you might as well do full cleaning and replacement of all seals and chain guide via Beisan parts.

Valve adjustment is super easy, get a feeler gauge and measure yourself. 1.5 hour job for plugs...lol.

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Old 06-08-2019, 11:20 PM   #11
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While we are on this subject, the valve clearances decrease with wear of the valve and seat so maybe the OP's mechanic really knows his stuff and is listening for a quieter valve and making sure all 24 tick at the right clearance/volume every 2 turns of the crankshaft - presumably with the motor cold?

When the valve clearance reduces to zero you will lose compression and the valves and seats will burn. A head job will fix this but it's better to keep the valves at the correct clearance.

Take care with the cam follower retaining springs, I've seen these dislodged replacing the cam cover and you end up with the cam lobe kissing the the valve spring retainer. If this happens I hope you have the meshes in the oil return passages.
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Old 06-12-2019, 02:11 PM   #12
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Unless it's absurdly out of spec, you can't hear any difference. You want to get them adjusted long before they're absurdly out of spec.
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Old 06-12-2019, 02:12 PM   #13
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Unless it's absurdly out of spec, you can't hear any difference. You want to get them adjusted long before they're absurdly out of spec.
that's what I was thinking. ty
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