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///M3 Forum
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 06-05-2016, 09:06 AM   #1
Cayne23
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Valve adjustment

So i did a valve adjustment yesterday. Everything went well. Not many were out of spec. Close everything up. Start the car. After 2 minutes i hear a ticking that definitely wasnt there before. I guess i jave to open her back up and recheck everything. Fvck
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Old 06-05-2016, 11:30 AM   #2
Cayne23
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So i popped the VC back off to check things out. Right away i see on cylinder 4, intake camshaft, front valve, no shim. How can i see that there isnt a shim there? Because stupid ass me didnt slide the rocker arm back into position. Uh oh, i thought. Fearing the worst i start looking for the shim. I found it sitting in the middle of my engine. Shew!!!!
Installed shim and slid the rocker arm into position. I then check the gaps on all the valves again. Everything is good. I put everything back together and started the engine. No more ticking, yeah! Went for a drive, everything seems ok

Last edited by Cayne23; 06-05-2016 at 12:02 PM.
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Old 06-05-2016, 01:46 PM   #3
av516
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Quote:
Originally Posted by Cayne23 View Post
So i popped the VC back off to check things out. Right away i see on cylinder 4, intake camshaft, front valve, no shim. How can i see that there isnt a shim there? Because stupid ass me didnt slide the rocker arm back into position. Uh oh, i thought. Fearing the worst i start looking for the shim. I found it sitting in the middle of my engine. Shew!!!!
Installed shim and slid the rocker arm into position. I then check the gaps on all the valves again. Everything is good. I put everything back together and started the engine. No more ticking, yeah! Went for a drive, everything seems ok
do update us
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Old 06-05-2016, 02:38 PM   #4
Cayne23
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Yup
I did push it during my test drive, after things warmed up. Still sounds normal when i got home.
It only ran for a couple of min when it ticked.

Last edited by Cayne23; 06-05-2016 at 02:42 PM.
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Old 06-05-2016, 05:28 PM   #5
Cayne23
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U guys think i did any damage?
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Old 06-06-2016, 11:25 AM   #6
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Sounds like it's fine. I wouldn't worry about it.
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Old 06-06-2016, 12:52 PM   #7
idriveastick
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Holy crisis averted batman. Glad everything worked out. How long did the entire valve adjustment take you? I'm thinking about doing it in a few months.
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Old 06-06-2016, 04:03 PM   #8
Cayne23
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2 1/2 hours. Start to finish
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Old 06-07-2016, 02:04 AM   #9
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When I got my M3 I was checking it over and it had an inlet rocker retaining clip broken. The rocker had moved out-of-line and the shim popped. Looked like the car had done quite a few K's that way as the broken part of the spring was all rounded off from bouncing around in there and a few of the valves were out of tolerance. No unusually loud ticking though.
There was polishing on the cam lobe from lightly brushing on the retainer. After I cleaned it the lobe was smooth to feel let alone measure. Seems BMW designed them to survive this. Ran ok on 3 valves too.
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Old 06-07-2016, 04:58 AM   #10
Cayne23
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Well in going on a 70 mile one way trip this weekend. That'll tell me everything. Though i doubt i hurr anything
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Old 06-18-2016, 08:18 AM   #11
Cayne23
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Ok, so now i still hear a slight ticking sound. I have now removed the VC twice, after the first valve adjustment. All valves are right in the middle of tge range. .008 for intake, .012 for exhaust. The only thing i didnt like about the gap check was that on the intake side for example, the .008 feeler fit in easily, no drag, but the .009 did not fit. 4 valves are like that.
I did not however notice any damage on the cam or the rocker arm of the valve that popped the shim.
The car drives perfectly. Starts normally. Pulls hard. Smooth idle. Like i said. The car only ran at idle for a couple of minutes with a popped shim. Revved once to 1800 rpm. Hmmm... any thoughts guys?

Last edited by Cayne23; 06-18-2016 at 08:18 AM.
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Old 06-20-2016, 02:59 PM   #12
Cayne23
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Anyone?
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Old 06-20-2016, 07:48 PM   #13
Commando
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You've been at this long enough to know that if you listen hard enough you can hear what you want to (not) hear.
The inlet valves are less critical than the exhausts.
The steps in the shims sizes are in steps of .04mm and the clearance range is .05mm which will not enable you to get every valve exactly in the middle of the clearances. There may be a case where a valve can be set to either extreme of the range though. Remenber these valves tigten up with use. It is better to set them to the loose end of the range and live with the ticking. At least you know they are closing. So your 4 valves with .008" are fine as .009" is the limit.
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Old 06-20-2016, 07:59 PM   #14
Cayne23
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Im just womdering if maybe i put a flat spot or something on the lobe when the shim popped. The rocker was just hanging next to the valve spring so i dont think that got any damage. I do think, and so does my wife, that there is a ticking sound. And it defiantly wasnt there before. How could i be so stupid, rhetorical question.
Im gonna open it back up next weekend and look for any damage on the cam.
Or maybe its the wiseco shims that are just loud. This is my second adjustment with these shims. The first adjustment i only had 8 valves out of spec. And i reused 4 of the bmw shims in to different valve seats. Now this time i used more wiseco shims and wasnt able to reuse that many bmw shims. Maybe thats it

Last edited by Cayne23; 06-20-2016 at 08:04 PM.
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Old 06-20-2016, 08:16 PM   #15
Commando
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I fully appreciate your concern. Mine did some 1000's of K's with the shim popped. I assume this as several valves were out of clearance. The lobe was just touching the vave spring retainer and polished the lobe where it was touching. Once I cleaned the lobe I could still see the mark but could feel nothing. I stronly doubt your faux pas has done any harm at all.
If you increased the clearance on some valves they will be louder but I dont believe the Wiseco shims are the cause.
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Old 06-20-2016, 08:59 PM   #16
Cayne23
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Well im taking her up to AC this weekend. Im gonna drive her lije i always do, fast. Then next week I'll open her up. Why not? It only takes 10-15min to pop the cover and it doesn't cost me anything. All my gaskets are new, viton rubber so they can be reused after being wiped off. And i have extra copper crush washers for the oil return line. Thats the only part i replace new. I'll snap some picks and throw em up here so ppl can put their eyes on it too
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