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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 Mon, Dec-07-2015, 01:31:07 AM   #21
terraphantm
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Default Re: Warped Valve Cover?

It's probably the gasket. My victor reinz gasket leaked very quickly. They're known to be crap in pretty much all BMW circles
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Old Mon, Dec-07-2015, 09:12:19 PM   #22
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Default Re: Warped Valve Cover?

weird, I've never had a problem with Victor Reinz gaskets before
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Old Sat, Dec-12-2015, 09:08:36 PM   #23
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Default Re: Warped Valve Cover?

So I finally tear into this today and just when I've got all the plugs out, and tucking in the O2 sensors behind the engine, I find this.....loose valve cover bolt, rear most on the passenger side in the exact area where my leak is. It's so loose I'm surprised it hadn't fallen out completely. (I guess picture posting is not functioning).

Should I just tighten this up and put it all back together, and forgo removing and replacing the entire gasket? I'm just not sure if since there is already a leak path at that point, tightening might not help. I've got a full set of OE gaskets ready to go, but I guess I can just stash them away for the future. Not having to pull the gaskets could save me another 2 hours or so. It's my first go around on this, so taking it slow.

Warped valve cover....$1g.....so pissed right now.
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Old Sat, Dec-12-2015, 09:18:39 PM   #24
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Default Re: Warped Valve Cover?

OP torque the gasket on the car to spec. All of the bolts. Check them all. Wipe down the leakage and drive a few miles. Visually inspect it afterwards. No point in breaking it all down if the shop just forgot a bolt...
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Old Sun, Dec-13-2015, 12:30:05 AM   #25
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Default Re: Warped Valve Cover?

I've seen warped valve covers. The crappy plastic ones on M52 engines. Either way no such problem with the aluminum valve cover on the S54.
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Old Sun, Dec-13-2015, 11:31:05 PM   #26
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Default Re: Warped Valve Cover?

Torqued down the loose bolt to spec (7 ft-lb-essentially hand tight (as stated in Bentley manual)) and cleaned everything up where leaking. Went for a drive to get the oil temp up, wound it out pretty good---no leaks. I'll be monitoring this and calling the shop tomorrow to have a nice little discussion about how they diagnosed this problem.
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Old Sun, Dec-20-2015, 10:28:27 PM   #27
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Default Re: Warped Valve Cover?

Only leak I see now is a minute amount of oil seeping through the tightened (previously loose) valve cover bolt and washer. No other bolts have this slight oil seepage. What is the cause of this? Should I pull it out and put some RTV in between the bolt and washer?
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Old Tue, Dec-22-2015, 02:18:55 AM   #28
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Default Re: Warped Valve Cover?

Replaced valve cover 11/15. no more oil leakage
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Old Sat, Dec-26-2015, 06:58:34 AM   #29
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Default Re: Warped Valve Cover?

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Replaced valve cover 11/15. no more oil leakage




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Old Tue, Dec-04-2018, 06:42:23 PM   #30
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Default Re: Warped Valve Cover?

To add to the conversation...I have had the VCG leak on three occasions. Once a year after a very reputable shop did the 30k mile valve adjustment (they re-did the gasket free), another at about 50k miles and the VCG was replaced in Germany by a BMW dealership service shop. The third leak has occurred at 66k...about a year after the 60k valve adjustment. Reputable mechanic just diagnosed a warped VC. I believe it to be true. I canít account for 3 VCG leaks with any other explanation.

Thoughts?
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Discussing Warped Valve Cover? 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)