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Author Topic: Lower timing cover  (Read 14365 times)

318bud

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Lower timing cover
« Reply #30 on: July 13, 2011, 09:40:17 AM »
Okay so i guess this is my problem..never noticed theres a keyway that i had to line up with the hub
idk if this is messed up or not..but when i line the key up, the hub still spins freely(over the keyway) is this supposed to happen?
i think this is why you said it must be tightened ALOT
So all i must do is just make sure the keyway is lined up with the slot on the hub, than tighten.
Hope it works!
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318bud

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« Reply #31 on: July 13, 2011, 11:08:18 AM »
Okay so im pretty sure something  bad happened. I lined it up properly and i could tell it was all in place
I start it up and something pops and i see smoke coming out of the ICV hose, that came off the ICV somehow
So my buddy tries to start it up and i can see that the pulley is in place and not wiggling so im pretty stumped :/
the car is getting towed out of here soon
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rjcaptsean

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« Reply #32 on: July 13, 2011, 08:29:40 PM »
GAH!   That's not good.  When you saw the slot in the crank, was there a piece of square metal sticking up?

The square metal is the key and it should be sticking up and keeping the timing gear and the dampener hub from spinning freely.  Cranking down on the bolt just keeps them from getting sloppy and shearing off that key.  

It is sounding more and more like you left that key out of the slot in the crank.  Or, it has sheared off.  If the timing gear is moving too, your timing is way off.  One way to check this without pulling is all back apart is to pull the #1 spark plug out (the one closest to the front of the car).  Take a long smooth rod (small wooden dowel or metal screwdriver will work) and insert it into the plug hole.  Gently rotate the engine by turning the crankshaft bolt.   When the stick is up as far as it will go, the #1 piston is at top dead center.  At this point, look down at the Dampener and you should see a small slot on the top of one of the cogs of the gear.  It should be pointing directly at the arrow on the Oil filter housing.  (The perspective of this picture is looking from the drivers side.)
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DesktopDave

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Lower timing cover
« Reply #33 on: July 13, 2011, 09:13:01 PM »
I hate to be the bringer of bad news, but you likely have some bent intake valves.  They aren't sealing, then when the plug ignites the fuel it blows the pressure back out the intake manifold.

Were I in your shoes I'd be looking for a good complete head or used motor.  It's not the end of the world if the valves are bent; there will still be some salvageable parts and spares are a good thing to have.

A good head, even if it does have bent valves, is still worth cash as a lot of M42's overheat & crack the head.
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318bud

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« Reply #34 on: July 13, 2011, 11:12:05 PM »
When i lined everything up today i tightened it up exactly on the key..but i was thinking it was sheared because the hub would spin over it

The key is not on  the top(like pictured above) the key was pretty much facing the bottom. Im guessing that this means my timing is off
The shop i took it too told me that it could have just backfired. Really not sure and im hoping nothing critical has happened because the motor only has 50k on it.
Not exactly sure what has caused all of this? I installed everything just like i took it off so im really :confused:
Im guessing i bent the intake valves when i was trying to crank it over before i seated the hub properly on the keyway :/
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DesktopDave

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Lower timing cover
« Reply #35 on: July 14, 2011, 04:40:30 PM »
Maybe you just put it back together at BDC?  If you did it all the same way it might all be OK, shouldn't matter.  Check it from top to bottom (take it back apart if you have to) and then figure out why that crank gear won't stay put.  I'd start off at TDC this time, it's just easier that way.

If you put it together the exact same way and the crank gear stayed with the crank, it should be OK.   If the  timing is off a tooth or two it might have backfired.  Could be that the  coils are timed wrong so it won't fire, could be the crank sender, could be lots of other things.  Even if it's the bent valve "worst  case scenario," chalk it down to experience.  I've killed cars myself  (though they deserved to die).  See what your mechanic says & go  from there.

After putting it all together, I leave the plugs out & spin the motor around a few times with a wrench on the crank bolt.  That way if it sticks or doesn't want to spin, I can resolve the trouble before spinning it with the starter.

Used M42s are still pretty cheap from early e36s and the car is relatively common.  There aren't a lot of people that liked the car, I'm not sure why.  Might be because the car was cheap for a Bimmer and the snobs avoided them.  The early e36M42's had some teething troubles that didn't help either.  I think the car is one of BMW's best, but I've been drinking the Kol-Aid for a while now.  Sure tastes good! :D
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318bud

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« Reply #36 on: July 19, 2011, 01:09:45 PM »
thanks alot for your help everyone! well the second time around it ended up being the spark plugs were out of order! lol and the first time was because i did not have the key lined up with the hub
thanks again for help everybody!:)
hopefully no more problems!:rolleyes:
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DesktopDave

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« Reply #37 on: July 19, 2011, 07:49:35 PM »
That's good to hear.  I'm thrilled that my diagnosis was wrong.  Keep her running, y'hear?  Hopefully easy problems...these cars aren't trouble-free, but your work will pay off as increased reliability down the road.
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Sold: '97 Montrealblau 318iS, '91 Brilliantrot 318i, '91 Brilliantrot 318iS

rjcaptsean

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« Reply #38 on: July 20, 2011, 04:57:02 AM »
Glad to be of service!  When I'm away from home for long stretches I have to live my BMW life vicariously through the members on the forums, so it's nice to be able to return the favor.

Very happy you got it back running without a huge headache.  Now you can look back and relish in all the experience points you just earned!
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stillmatick

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« Reply #39 on: August 10, 2011, 06:43:12 AM »
where can i buy this tool at?
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rjcaptsean

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« Reply #40 on: August 11, 2011, 12:32:33 PM »
Pelican Parts.  $58 plus shipping or you can try to find one used.  Not selling mine btw.  :)

http://www.pelicanparts.com/bmw/catalog/shopcart/BE30/POR_BE30_TOLtol_pg2.htm#item8
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