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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 07-14-2014, 02:30 PM
89NightFury 89NightFury is offline
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Location: McDougal Arkansas
 
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Mein Auto: 1989 325i
Misfire on #4

I recently bought my 1889 325I with 73500 original miles. The test drive went fine but when I went to go start it the next day it wouldn't start very well.It was misfiring on #4 so I replaced the spark plugs and it was still misfiring. Checked the injectors and they were good, everything on the fuel rail worked fine. This is my only car so I really need some help
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  #2  
Old 07-14-2014, 08:26 PM
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downhiller downhiller is offline
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compression test


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  #3  
Old 07-16-2014, 10:50 PM
89NightFury 89NightFury is offline
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compression is good. I think the cam might be off.
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  #4  
Old 07-26-2014, 01:25 PM
89NightFury 89NightFury is offline
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Anyone else have any ideas
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  #5  
Old 07-26-2014, 09:19 PM
bimmerphilster bimmerphilster is offline
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Mein Auto: 1985 BMW 325e 2.7L
Check Spark Plug wire, clean contacts on distributor and rotor. Also I have had new plugs bad out of the box, ya never know
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  #6  
Old 07-26-2014, 09:46 PM
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hornhospital hornhospital is offline
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+1 on checking/cleaning the distributor cap.
Swap the plug from 3 or 5 into the 4 hole. If that makes no difference, swap the plug wires. If that doesn't help, it's the cylinder.
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1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #7  
Old 07-26-2014, 10:16 PM
bimmerphilster bimmerphilster is offline
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I was just going to add that Horn, Connect a spare plug to wore number four and see if you get a good spark, your methods also validates that
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  #8  
Old 07-27-2014, 04:37 AM
M-technik-3 M-technik-3 is offline
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Ohm the spark plug lead. See if it's beyond limit.
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  #9  
Old 07-27-2014, 06:00 AM
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downhiller downhiller is offline
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Quote:
Originally Posted by 89NightFury View Post
compression is good. I think the cam might be off.

you could have a worn lobe or broken rocker. after the spark plug wire swap doesnt change, then pop the valve cover off and inspect


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  #10  
Old 07-27-2014, 10:33 AM
89NightFury 89NightFury is offline
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I will definitely be checking all of these possibilities and I thank everyone for their input. I will update what worked and what didn't.
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  #11  
Old 07-28-2014, 10:26 AM
89NightFury 89NightFury is offline
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Well found out what's wrong with the car. Tore into it today and this is what I found. Thankfully its a $12 dollar part but Im ordering the $30 one just to be safe.
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  #12  
Old 07-28-2014, 02:28 PM
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hornhospital hornhospital is offline
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Congrats to downhiller for winning the "why's my engine missing?" mystery lottery.

NightFury, you have more work ahead than you perhaps have anticipated:

From the Bentley Service Manual:

4.6 Removing and Installing Rocker Arm Shafts
and Rocker Arms

Removing and installing the rockers arms and rocker arm
shafts requires that the cylinder head be removed from the
cylinder block.
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Quotes to live by:
guessing gets expensive...drivinfaster
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Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #13  
Old 07-28-2014, 02:34 PM
89NightFury 89NightFury is offline
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Location: McDougal Arkansas
 
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Crap
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  #14  
Old 07-28-2014, 02:39 PM
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hornhospital hornhospital is offline
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Location: In the Grumpy Chair
 
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Yeah, I agree. The good part is you need to find out if the valve hit the piston anyway, so......

Do you have a service manual?
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #15  
Old 07-28-2014, 03:08 PM
bimmerphilster bimmerphilster is offline
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Mein Auto: 1985 BMW 325e 2.7L
If it were me

If it was I, and I am saying this with no ill will...........I would pull the head and have it rebuilt and checked. I did mine two years ago when I started rebuilding it and it is a good thing I did because I had several worn rockers which I knew was the case since I could never get a good valve clearance on two valves. I know it is a lot of extra work but if you have one broken rocker there possibly is more that are worn. Since these are interference engines messing around with worn parts in the cylinder head could be very costly and possibly ruin your engine completely. I had mine rebuilt for $180 plus the cost of two rockers and a gasket set. That's my 2 cents worth and good luck
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  #16  
Old 07-28-2014, 03:12 PM
89NightFury 89NightFury is offline
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Location: McDougal Arkansas
 
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I will definitely be getting dirty tomorrow. A good rebuild sounds good. Might as well prep it for a turbo, put a new timing belt and gasket set in while I've got it apart.
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  #17  
Old 07-29-2014, 06:52 AM
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sixpot_simon sixpot_simon is offline
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A broken rocker at 74000 is pretty unlucky.

Glad to hear it hasn't dampened your spirits. All the best for the rebuild. As Horn says, check for damaged valves and pistons.

PS I'd have expected an 1889 car to be powered by steam or horses!
(your first post)
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  #18  
Old 07-29-2014, 09:47 AM
89NightFury 89NightFury is offline
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