Clamping rail pin - Mercedes-Benz Forum
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post #1 of 14 (permalink) Old 10-01-2018, 11:28 AM Thread Starter
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Clamping rail pin

I am replacing the upper sliding rails of the timing chain. I have the hex nut cover off of the hole that holds the pin used by the clamping rail for its' pivot point. I have watched the video and the guy made it look so easy he didn't explain what I use to reach into the hole to pull out the pin. I did order the pin just in case I needed one. The pin appears to have very light groves on the inside, almost as though a bolt would screw into the pin so that the pin could be pulled out of the hole.

What do I use to pull the pin out of the hole? TIA-Tom
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post #2 of 14 (permalink) Old 10-01-2018, 11:31 AM
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Same thing you use to pull the upper rail pins. Itís threaded internally, but should come out a lot easier since it sits in oil. I can usually just thread a bolt in and yank on it and it comes out.

I believe a valve cover bolt works. M8 something something...
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post #3 of 14 (permalink) Old 10-01-2018, 11:40 AM
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Clamping rail pin

Check your email buddy.... or

Or


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1991 560SEC 199 /268, 17" RS90'S, Eibach springs, Bilstein HD shocks, Custom rear sway bar, Euro Headlights, Custom ceramic coated headers and down pipes with stainless dual exhaust, W140 glass sunroof, dog ear trunk spoiler, OEM Skid Plate, Euro bumpers, wood refinish and restored.
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post #4 of 14 (permalink) Old 10-01-2018, 11:50 AM Thread Starter
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Originally Posted by jackjtr View Post
Same thing you use to pull the upper rail pins. Itís threaded internally, but should come out a lot easier since it sits in oil. I can usually just thread a bolt in and yank on it and it comes out.

I believe a valve cover bolt works. M8 something something...
I used the valve cover bolts to remove the other pins but this one is much bigger. The other pins which I have removed actually fit inside this pin (I ordered one and have it on hand for just this type of situation).
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post #5 of 14 (permalink) Old 10-01-2018, 11:51 AM Thread Starter
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Check your email buddy.... or

Or
281lxm, thanks for the message with several suggestions. I will try the tape method after lunch.
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post #6 of 14 (permalink) Old 10-01-2018, 11:53 AM
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Originally Posted by Tom Kaiser View Post
I used the valve cover bolts to remove the other pins but this one is much bigger. The other pins which I have removed actually fit inside this pin (I ordered one and have it on hand for just this type of situation).

Well, itís definitely threaded. If you can find the right size and pitch bolt, youíre good.
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post #7 of 14 (permalink) Old 10-01-2018, 11:54 AM
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Originally Posted by Tom Kaiser View Post
281lxm, thanks for the message with several suggestions. I will try the tape method after lunch.


That was actually shrink wrap but the natural taper of the bolt should grab enough, avoid too long a bolt, you dont wNt the pin flush to the back of the head face


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post #8 of 14 (permalink) Old 10-01-2018, 12:17 PM Thread Starter
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I ended up using a dental pick. They are strong, long, and have an excellent hooked point. The roller pin came out without issue. Now for the rebuild on the passenger side.

Thanks for all of the suggestions. -Tom
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post #9 of 14 (permalink) Old 10-01-2018, 12:49 PM
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I am late to the party, but just in case somebody ever needs the info: so far I removed two pins from 560 engines and one from a 420. The last I removed was on a 560 engine manufactured in 1987 and the pin was not threaded inside. The one in the two pictures below got out easier (1991 560 engine), also was not threaded. For that reason I had to use heat shrink on the bolt, forcing the wrapped bolt inside the pin and hoping that the friction becomes so great that it will pull it out. In the end it worked (second picture shows how much I had to push it in), but it did put quite some fight in the process. On the last engine it was so hard to pull it out it took me almost one hour.

I did not check, but I am inclined to believe that the 420 and 560 use the exact pin.
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post #10 of 14 (permalink) Old 10-01-2018, 01:44 PM
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Clamping rail pin

The fear on not using the tool is that you push it too far to the wall of the head. That means it is a pressure fit only (ask me how I know) The MB tool got here 2 days after I got it out. Here was my pin after removal - the new one was used.



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Last edited by 281lxm; 10-01-2018 at 03:06 PM.
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