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  #76  
Old 12-13-2008, 06:53 PM
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Thumbs up you got it

Quote:
Originally Posted by blankenship View Post
if i'm reading you correctly, you're saying that to be assured of doing this correctly, with my current lobe/washer situation (which looks just like MPLafleur's shot (re-posted below) and at TDC on my crank damper, i need to:

1) turn the engine over such that i can remove the rocker arms.
2) w/ rocker arms removed, rotate the engine until i once again see the lobe/washer situation in the photos below (so i know what i'm starting with).
3) then rotate the crank another 360º to the next TDC (which we assume will be the intake stroke for the engine, even though the cam sprocket and lobe position will be 180º different from the photo).
4) remove the cam sprocket.
5) rotate the cam (by hand) until it is in the position shown in the photo below.
6) put the sprocket back on, and reassemble everything.
7) reset all the valve clearances? (again?)
8) drive off into the sunset.


yes?
Yes. Exactly.
Quote:
question: HOW is it POSSIBLE that i could've botched this and gotten it timed 180º out? is this fairly common/easy to do? i don't get it.
I have no idea, apparenly you have the rare 'gotcha' option on the camshaft washer that let's you install the cam 180 degrees wrong just in case you ever get wrapped up in a three stooges movie about fixing old diesels.

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  #77  
Old 12-13-2008, 06:53 PM
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Gentleman this appears to have been my lucky day. I have a contract that requires my attention on each and every Saturday.

It is perhaps also good that I did not check the progress on the thread while working today. You do seem to have it well in hand now.

Who would have thought that washer had two keyway positions. A lot of people will be watching for that washer from now on. Perhaps only present on the euro version or most ouir members have been very lucky. Much like the other day the end of this is still in sight somehow. Think of where this may have gone if the poster had not detected the washer actually had two keyway slots?
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  #78  
Old 12-13-2008, 06:57 PM
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Quote:
Originally Posted by jt20 View Post
the rocker arms are removed^^^!
Just noticed that.. I'm not feeling particularly bright..

My vote is option 2. Since he already popped off the cam sprocket to flip the washer, it shouldn't be that big of a deal to pop it off again, rotate the cam 180 degrees and go for it. Then again......
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  #79  
Old 12-13-2008, 07:03 PM
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yeah, barry- i decided that as far as all the pontificating about the washer went, i simply had to get out in the cold/rain and "cut that issue off at the knees."

now my question more relates to how in the world does one get themselves timed 180º out? it has nothing to do with that washer, you know? (the engine doesn't care what direction that washer's pointed...it's for user reference only). i can't imagine how i managed it. can you?

also, anybody else want to chime in w/ mr. danielson and confirm my plan is legit?
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  #80  
Old 12-13-2008, 07:05 PM
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Blakenship, your only option in my opinion and probably yours as well is to flip the washer top for bottom. Since you have the rockers already loose you can then rotate the camshaft to line up your cam timing marks. Please make sure that notch in the injection pump window is present first.

You have apparently had quite the day overall but the issue is basically solved in my opinion. You are also going to be too tired to chase girls this evening I imagine.
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  #81  
Old 12-13-2008, 07:06 PM
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the second plan of attack is safer. as astroman suggested.
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  #82  
Old 12-13-2008, 07:09 PM
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unless, john, you're over here holding the cam sprocket / chain (with a pencil through the center hole), while i turn the engine over!!!!!!!!!!!
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former proud owner of:
'85 mercedes euro 300TD
'80 mercedes 300TD
'77 mercedes 280e
'80 mercedes euro 250
'82 mercedes euro 250
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  #83  
Old 12-13-2008, 07:13 PM
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count me in buddy. Just gotta call.

ps.. its getting dark here isnt it?
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  #84  
Old 12-13-2008, 07:15 PM
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Quote:
Originally Posted by blankenship View Post
yeah, barry- i decided that as far as all the pontificating about the washer went, i simply had to get out in the cold/rain and "cut that issue off at the knees."

now my question more relates to how in the world does one get themselves timed 180º out? it has nothing to do with that washer, you know? (the engine doesn't care what direction that washer's pointed...it's for user reference only). i can't imagine how i managed it. can you?
Not without some thought. It seems reasonable though that if you had your head off and the sprocket and washer off. If you put the sprocket back on with the head off the engine for example with the mark inverted you may have lined the mark up before installing the head.

Because of interference problems you could not have rotated the cam that far with the head on the engine . Give me a little more time to mull this over though as this was just an almost instantainious first thought.

Also remember many people have managed to put their engines back together with the cam exactly on the wrong cycle.Or 180 degrees out if one preffers. I was aleady concerned much earlier that you may have damaged a valve in your exploits. At least that has been eliminated as the engine does not have any unusual interference when the cam is 180 degrees off.

So you are far from the first.

Last edited by barry123400; 12-14-2008 at 12:23 AM.
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  #85  
Old 12-13-2008, 07:20 PM
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Quote:
Originally Posted by barry123400 View Post
Also remember many people have managed to put their engines back together with the cam exactly on the wrong cycle. So you are far from the first.
Yep, I managed to do it. So you're not alone, my friend. And if I can figure it out, anybody can.
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  #86  
Old 12-13-2008, 07:29 PM
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and he most likely used the faulty washer as a reference along with the timing marks he put on the sprocket to identify its relationship to the chain. (causing confusion and subsequent action)
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Last edited by jt20; 12-13-2008 at 07:47 PM.
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  #87  
Old 12-13-2008, 08:01 PM
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I thought I was a little tired tonite. This explanation is the correct one I believe. I went back to your first post. You had the head rebuilt. So when you put the washer on upside down in relationship to its previous positioning. Naturally you lined up the new mark that was 180 degrees out before installing the head.

This is how you got out that far. Or the shop that rebuilt the head did this for you before giving the head back. Makes sense basically? This is about the only way it could have happened in my opinion. Tired as I am.

The sprocket also does not have two keyways. Your posts and the resultant thread were also a good learning tool for a lot of viewers.

Last edited by barry123400; 12-14-2008 at 12:32 AM.
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  #88  
Old 12-13-2008, 09:54 PM
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I put a distributor in 180 degree off on a Chevy 6 cylinder. The worst part was that it actually started and would run.... terribly of course... but it caused me to check everything in the world before thinking to check the distributor clocking....
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  #89  
Old 12-14-2008, 08:58 PM
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Update?

It's been over 24 hours since news of progress. I'm on the edge of my seat, how is it going?
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  #90  
Old 12-14-2008, 09:08 PM
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on the edge

i'm on the edge of my seat, too! (have been for months).

unfortunately, Arctic Blast '08 prevented me from doing anything today...i can't fit the car in my garage, so it's out in the weather...with 20º snow falling on this dark gray day in Portland, I worked on other (indoor) stuff.

i'll actually be out of town and on a project, and won't be able to get back to her til early january!!!! JT20 lives here, too, so we're going to plan a day to meet and hopefully resolve it all then.

i'll be sure to post news.
happy holidays + stay tuned!

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'83 300CDT (286k)

former proud owner of:
'85 mercedes euro 300TD
'80 mercedes 300TD
'77 mercedes 280e
'80 mercedes euro 250
'82 mercedes euro 250
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