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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Jul-14-2017, 02:16:36 PM   #11
albino09
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Originally Posted by EricSMG View Post
Possible to need none but unlikely in my experience, unless, as noted, they were recently adjusted. My black car needed 18 out of 24 at 104k, indicating that it'd not been done for a while.

I'm with Brett - I always run mine as loose as I can get them whilst in spec. Given the shim sizing it's not always possible to get them the "all" loose or tight, though.
My car only needed 1 or 2 shim changes at 60k. I don't have the service history for the first 39k so I have to assume that was the first valve service. Some were on the tight side and I wanted to loosen them up but the Wiseco shim pack didn't have any sizes that would allow me to adjust them while still staying in spec.
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Old Fri, Jul-14-2017, 03:33:45 PM   #12
nowanker
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

Never counted the S54 valve adjust's I've done, but more than 20 and fewer than 50?
1 car needed zero
1 car needed 21 (B*tch!)
And most fell into the 3-6 range.
The one I bought "just had its inspection II" but needed 6, and some valves were out two steps. I guess a valve adjust wasn't part of that service. Or the one before it...
If your friend did it and it came out clean, sounds good to me!
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Old Fri, Jul-14-2017, 04:21:50 PM   #13
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Originally Posted by nowanker View Post
Never counted the S54 valve adjust's I've done, but more than 20 and fewer than 50?
1 car needed zero
1 car needed 21 (B*tch!)
And most fell into the 3-6 range.
The one I bought "just had its inspection II" but needed 6, and some valves were out two steps. I guess a valve adjust wasn't part of that service. Or the one before it...
If your friend did it and it came out clean, sounds good to me!
Yeah, I was a little surprised but he's been working on my cars for 10+ years and our families hang out all the time so he's the only person I trust completely with my cars.
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Old Fri, Jul-14-2017, 04:24:16 PM   #14
TboneM3
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

Tighter tolerances mean the valves are opening up, abeit slightly, more. Why would that result in more tq than horsepower? More aggressive cams, which also push the valves open a bit more (and for longer duration) are known for getting more horsepower usually right?

I don't see how tighter tolerances, up to the spec, could be anything but a good thing?

Please enlighten me.
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Old Fri, Jul-14-2017, 05:37:24 PM   #15
EricSMG
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Originally Posted by TboneM3 View Post
Tighter tolerances mean the valves are opening up, abeit slightly, more. Why would that result in more tq than horsepower? More aggressive cams, which also push the valves open a bit more (and for longer duration) are known for getting more horsepower usually right?

I don't see how tighter tolerances, up to the spec, could be anything but a good thing?

Please enlighten me.
I agree with you - tighter means more lift and duration which means more power.

However! Given that the shims come in increments that are 4/5ths the total allowable tolerance range, it is extremely easy to go too tight and lose performance. Therefore, I keep things loose and only adjust if way too loose.
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Old Fri, Jul-14-2017, 06:59:54 PM   #16
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

Quote:
Originally Posted by TboneM3 View Post
Tighter tolerances mean the valves are opening up, abeit slightly, more. Why would that result in more tq than horsepower? More aggressive cams, which also push the valves open a bit more (and for longer duration) are known for getting more horsepower usually right?

I don't see how tighter tolerances, up to the spec, could be anything but a good thing?

Please enlighten me.
Tune your motor however you want, again tight is for torque, loose is for horsepower. I subscribed to the higher output side. There are a reason these phrases exist;


"Tappy tappets are happy tappets"
"A noisy valve is a happy valve"
"Loud Valves Save Lives"
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Old Fri, Jul-14-2017, 07:06:06 PM   #17
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Originally Posted by MFNATIK View Post
My buddy who did the service (he's a BMW Tech) said all the shims were within spec and he felt them all having about the right amount of resistance with his feeler tool. He felt that they'd last until the next 30k mile inspection service so none were change. I trust him so not a big deal, but would this be a sign that previous owner just didn't drive the car very hard so that the shims didn't wear down much?
This bit makes me suspicious, as it's not really how feeler gauges are used.

... and BMW Tech's are remarkably good at finding that "no shims need to be changed".

I've certainly done adjustments where no shims needed to be adjusted.

But...

I'm dubious
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Old Fri, Jul-14-2017, 07:22:27 PM   #18
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Originally Posted by Obioban View Post
This bit makes me suspicious, as it's not really how feeler gauges are used
Huh? That's exactly how I understand them to work. The resistance of moving the gauge in and out determines the size. Then you can split hairs when the next size gauge isn't appropriate. "On the tight side of and on the loose side of".
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Old Fri, Jul-14-2017, 07:23:53 PM   #19
Braymond141
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Old Fri, Jul-14-2017, 08:20:10 PM   #20
TboneM3
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Default Re: Just had inspection service, no valves needed to be re-shimmed, is this normal or

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Originally Posted by Braymond141 View Post
Huh? That's exactly how I understand them to work. The resistance of moving the gauge in and out determines the size. Then you can split hairs when the next size gauge isn't appropriate. "On the tight side of and on the loose side of".
I took it like Ian did, but I see your POV too - I think both are right. Ian and I thought he meant he used one feeler and decided whether the tolerance was good or not based on how much resistance when it should be more or less, a go no-go situation.

I take your point, though, that when the next feeler won't go, then you use the amount of resistance to "guess" the actual tolerance when it falls in between feelers.

So now, did that tech do what you're saying Brett? or did he do what Ian and I first though? Also your assumption or take away that long time, DIY members like Ian esp and me too don't know how to do a valve adjustment is laughable.

I think the most obvious answer is that the OP is not repeating, verbatim, what the tech told him and I'm surprised you didn't realize that and instead questioned whether we understood how to measure valve tolerance
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Evolve-R eVenturi Euro Headers|Sect 1 OE CSL OM Scorza D/A pullies/fan delete TMS camber/subf plates
RE Besian AKG AutoSolutions 30% TMS front sway GroundControl(Koni/Eibach) Sportline 8S 18" PSS 245/275
Pioneer DEH-80PRS Eclipse PA5422 CDT HD-6 + WS-100i CDT EX-530

Beater: 1999 Civic LX - Kenwood x998 Eclipse 32430 CDT HD-6 + HD-100 CDT EX-530 Clarion 10"

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Discussing Just had inspection service, no valves needed to be re-shimmed, is this normal or OK? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)