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-   -   330i money shifted...ooops (http://forum.e46fanatics.com/showthread.php?t=615647)

02stu 10-12-2008 09:50 AM

330i money shifted...ooops
 
A buddy of mine shifted into 2nd instead of 4rth in his 330 under full power at the redline. Now it is only firing on three cylinders, those are the only codes its throwing. It will start, kinda, and doesn't make any mechanical sounds. Any ideas, is it toast?

BMW_Matt 10-12-2008 10:53 AM

warped heads?

shady3one3 10-12-2008 06:18 PM

Valves are bent.

A 6 cyl motor only has one head dude ^.

djnekkon 10-12-2008 06:24 PM

Quote:

Originally Posted by shady3one3 (Post 8674710)
Valves are bent.

A 6 cyl motor only has one head dude ^.

Yeah, but bent valves would make some nasty noise tho...I wouln't even try to drive it like that. Replace the block. biggers pistons FTW.

mechanicalmadness 10-12-2008 06:37 PM

Quote:

Originally Posted by shady3one3 (Post 8674710)
Valves are bent.

A 6 cyl motor only has one head dude ^.

+1

High RPM valve float leads to bad bad things. Such as bent valves.

they would also not make any noise unless they were bent to the point of actually droping the valve it's self in the cylinder. it doesnt take much of a smack for a valve to loose it's sealing abillity.

on the other hand Ill take your buddy's motor off of him for free;). lol

PEI330Ci 10-12-2008 08:17 PM

Quote:

Originally Posted by djnekkon (Post 8674738)
biggers pistons FTW.

Stock is 84mm...the largest you can run before you run into cylinder liner problems is 84.5mm.

Activ3 10-12-2008 08:29 PM

Quote:

Originally Posted by pei330ci (Post 8675270)
Stock is 84mm...the largest you can run before you run into cylinder liner problems is 84.5mm.

91mm stroke ftw? :eeps:

bimz101 10-12-2008 08:36 PM

valves are bent, but not bad enough to notice any crazy noises if car will still run. Happens all the time with mis-shifts! i would just get a new head for it, and then you will have a nice new tight top end! probably around 2k to get it all done with labor at the right shop.

PEI330Ci 10-13-2008 08:09 AM

Quote:

Originally Posted by Activ3 (Post 8675304)
91mm stroke ftw? :eeps:

How?

The bore centers are different between the M54 and S54.

4 door 330 10-13-2008 11:12 AM

Yes, I am the "buddy"...years of driving without incident and then...the money shift. Head is coming off as we speak and the consensus if one or more bent valves. The shop I used to work at has a valve and seat grinder, so it looks like ill get a three angle valve job while the car is under the knife, and hopefully have it back on the road this weekend with a little more power. If all is well I won't have to replace much more than that, but seals may be just as well since the car is at 104k. More to follow when it comes apart...

Bimmer Dude Xi 10-13-2008 03:49 PM

Quote:

Originally Posted by 4 door 330 (Post 8678881)
Yes, I am the "buddy"...years of driving without incident and then...the money shift. Head is coming off as we speak and the consensus if one or more bent valves. The shop I used to work at has a valve and seat grinder, so it looks like ill get a three angle valve job while the car is under the knife, and hopefully have it back on the road this weekend with a little more power. If all is well I won't have to replace much more than that, but seals may be just as well since the car is at 104k. More to follow when it comes apart...

Might as well rebuild the top end of your motor. Also get it cleaned as well.

4 door 330 10-15-2008 09:08 AM

Well parts are in the mail...tope end rebuild, all new guides, seals, exhaust valves, valve job, timing chain, etc...

Parts ended up around $1000, and found a good spot online called AboveAllMotorwerks.com. They sell a ton of BMW OEM and other popular European brands stuff at good prices. They also have a great catalog, and you can search for parts with BMW part #'s and thye give you other options for purchase.

Update next week when its all done...

mrshelley 10-17-2008 10:47 PM

When you go around 8300 rpm (on a 330), you bend the valves. All you need to do is buy some new valves and do a valve job. If I've seen this once, I've seen it a hundred times.

One solution to reducing the chance of the "money shift," is to use a 100% stock shift linkage. Short shifters add to the probability of a missed shift. Talent behind the wheel will more than make up the difference in quick shifts.

Again, if I've seen it once, I've seen it a hundred times.


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