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Old 04-25-2010, 06:31 PM   #1
SamE30e
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M50NV Cam timing help!



Hey guys,

I just did my head gasket and got the head rebuilt. The cam's were taken out. I have them roughly at TDC, the lobes are facing towards eachother. My problem is, I don't have the cam lock tool to find out exactly where TDC is on the cams. I've searched and watched a couple videos but I need clarification.

I know which way the gears go on because they're marked in relation to the cam but do the arrows on the cam gears point 90 degrees straight up in relation to the ground, or to the surface of the head? So looking from the front of the car will they look like \ or | ?

Also, I have the bentley and it says to install a timing chain tension tool and not the tensioner when doing it, can I just loosely install the tensioner?

This is what I have so far, it's just testing it out. I don't think it's right.



This is with no pressure on the chain tensioner.



This is with adding pressure with my finger, it lines the cam holes up all the way to the left like it's supposed to be.

Does the arrow at the top have to shift to point up 90 degrees from the top of the head? If thats the case I'd have to turn the cam counter clockwise.

Also the crank is at top dead center, the mark is lined up.


Thanks

Sam
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Old 04-25-2010, 06:47 PM   #2
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Id believe the arrows on the cam sproket to line up with the surface of the head.
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Old 04-25-2010, 06:51 PM   #3
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I just did this.. Follow this article and you'll be fine! You don't necessarily need to use the tensioner tool. Just use the stock one if you don't have one available. You really should use the cam locking tool as well..

http://www.pelicanparts.com/bmw/tech...aft-timing.htm
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Old 04-25-2010, 08:44 PM   #4
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Originally Posted by INFAMOU$ View Post
I just did this.. Follow this article and you'll be fine! You don't necessarily need to use the tensioner tool. Just use the stock one if you don't have one available. You really should use the cam locking tool as well..

http://www.pelicanparts.com/bmw/tech...aft-timing.htm
Where can I get a cam locking tool? They're pretty expensive. It just holds the cam parellel to the head right? I don't see why I can't just make sure they don't move.
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Old 04-25-2010, 10:56 PM   #5
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They need to be in sync with one another... if they are off, your timing will be also. Again, if you can find a way to make sure they are both in the SAME spot once everything is tight then you should be ok.
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Old 04-25-2010, 11:55 PM   #6
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My buddy is a tech, he's going to bring me a tool tomorrow.
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Old 04-26-2010, 01:17 PM   #7
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Glad to hear. You will have peace of mind it is done correctly that way! Just follow the Pelican write up i posted and you'll do fine!
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Old 04-27-2010, 12:45 AM   #8
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I did a head job on my M54 without any of the special tools. These engines are fairly easy to line up.
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Old 04-27-2010, 12:53 AM   #9
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Originally Posted by INFAMOU$ View Post
Glad to hear. You will have peace of mind it is done correctly that way! Just follow the Pelican write up i posted and you'll do fine!
I locked the cams and had it together in 10 minutes turned it over by hand with no plugs and it was like butter. Where I had the cams sitting before the tool were damn near perfect lol.
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Old 04-27-2010, 01:26 AM   #10
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Done yet?!
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Grow up and move on.
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