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  #1  
Old 09-17-2017, 06:18 PM
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W108 valve adjustment

Need to adjust one exhaust valve on my 4.5 liter engine. The special tool seems nla so what is everyone using? Will a 24 mm crows foot wrench work?
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  #2  
Old 09-17-2017, 09:01 PM
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I used a crow's foot without issues, not the best solution but one that works.
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  #3  
Old 09-17-2017, 09:12 PM
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I had to use a combination of crows foot and a hazet tool I had because several of the adjusters were rounded off. So I'd need to crank 1/3 rotation instead of just 1/6 rotation on many. I was lucky I had the hazet 17mm tool plus an "snap on" 17mm crows foot. The hazet too bit better (less likely to round of an adjuster), but the crows foot I was able to spin 1/3 a rotation and then disconnect it and slide it out because it's so much smaller.


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Old 09-18-2017, 08:00 AM
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Do you know if 24mm the correct size?
Ron
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  #5  
Old 09-18-2017, 08:49 AM
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Quote:
Originally Posted by R72benz View Post
Do you know if 24mm the correct size?
Ron
See below, posted yesterday.

Quote:
Originally Posted by fonzi View Post
I had to use a combination of crows foot and a hazet tool I had because several of the adjusters were rounded off. So I'd need to crank 1/3 rotation instead of just 1/6 rotation on many. I was lucky I had the hazet 17mm tool plus an "snap on" 17mm crows foot. The hazet too bit better (less likely to round of an adjuster), but the crows foot I was able to spin 1/3 a rotation and then disconnect it and slide it out because it's so much smaller.


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  #6  
Old 09-18-2017, 08:54 AM
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Probably you're looking for this special tool
It is useful to remove rocker arm very easily and use a standard socket to register valve clearance. I used it for my W123 with M115 938 (2.0L).
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  #7  
Old 09-18-2017, 11:17 AM
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You can't accurately measure valve clearance after removing the rocker on an m116 or m117 engine. They must be in place.
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  #8  
Old 09-18-2017, 12:53 PM
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Quote:
Originally Posted by Tomguy View Post
You can't accurately measure valve clearance after removing the rocker on an m116 or m117 engine. They must be in place.
Nor on ANY engine. When the follower is removed there is no clearance to be measured.

Step 1: Measure clearance
Step 2: Remove follower
Step 3: Use six-point socket to turn adjuster
Step 4: Replace follower
Step 5: Measure clearance
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  #9  
Old 09-18-2017, 07:34 PM
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Please disregard my last post. I was measuring the mounting fitting not the adjust fitting. 17mm is what I need.
Thanks,
Ron
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  #10  
Old 09-20-2017, 09:21 PM
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No special tool on Samstag Sales or Zeebay?
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  #11  
Old 09-21-2017, 08:14 AM
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Here's a picture of two hazet tools. I think I have the one on the right. It looks like there may be a part number:

Hazet 17mm Crowsfoot Valve Adjusting Wrenches

This looks like an opportunity to buy one right now. Overpriced? I don't know. But it looks like 329-4 is what you probably want.

https://www.ebay.com/i/122691923935




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  #12  
Old 09-21-2017, 12:18 PM
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IMO, unlike head bolts (which require a specific torque value, and thus the special tool to obtain a straight line from the bolt center to your torque wrench) the special tool isn't needed for valve adjustments. Worst case, if you feel the adjusters are too loose (below min torque resistance) you can follow Frank's advice to remove the rocker to measure that with a deep 6 point socket.
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1999 Chrysler 300M (Click for pic) - 207,xxx - totalled by Nationwide for $1600 in damage. Being rebuilt better.
2014 Jeep Grand Cherokee Limited (Click for pic) - 32,xxx

My Mercedes Benz 108 109 resource site
August 2014 newsletter live.

Previous: 1972 280SE 4.5 "Quicksilver", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
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