W210 valve cover gaskets - Mercedes-Benz Forum
 
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post #1 of 8 (permalink) Old 01-22-2016, 11:49 AM Thread Starter
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W210 valve cover gaskets

What's the easiest way to get the Allen key bolts off the valve cover on a 97 e420? The last 3 bolts I can't seem to get, the socket hits the firewall before I can even get close to the bolt. I have to do both sides and I'd rather not pay 500$ a side at my local euro repair shop.

Also, while I'm in there I'm going to replace the little oil tubes that oil the lifters, is there a specific brand that lasts longer than OEM? Thanks
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post #2 of 8 (permalink) Old 01-22-2016, 01:30 PM
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When I'm cramped for space, I use something like the 1/4" adapter all the way on the right in the photo below, I put it into a ratcheting wrench and use a torx/allen bit to remove or install hard to reach screws:

https://encrypted-tbn1.gstatic.com/s...zlD2u&usqp=CAY

The adapter I'm talking about has a 1/4" hex just like a bit driver does, these kits can be found at Sears, Harbor Freight, or your local auto parts store for around $10 or $20.
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post #3 of 8 (permalink) Old 01-22-2016, 01:31 PM
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Quote:
Originally Posted by mercedesnoob View Post
What's the easiest way to get the Allen key bolts off the valve cover on a 97 e420? The last 3 bolts I can't seem to get, the socket hits the firewall before I can even get close to the bolt. I have to do both sides and I'd rather not pay 500$ a side at my local euro repair shop.

Also, while I'm in there I'm going to replace the little oil tubes that oil the lifters, is there a specific brand that lasts longer than OEM? Thanks
For hex-head screws I remember using a regular right angle hex wrench.

I used Mercedes oiler tubes when servicing the two M119 motors I had previously. You might get better information when working on this engine if you post in the W140 or R129 forums as there is a lot of knowledge swirling around over there.
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post #4 of 8 (permalink) Old 01-23-2016, 04:49 AM
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An alternative to a hex key is this product:

U-Joint Metric Hex Drivers No. UJM400 | VehicleServicePros.com

You may also want to ensure that you have an inspection mirror to check the proper seating of the valve cover gasket in the back towards the fire wall before clamping down on reinstallation.

If not already considered, probably need to replace all of the breather hoses during this job. Lastly, the funky OE clamp on the passenger side breather hose can be replace with a stainless screw clamp for easier installation.
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post #5 of 8 (permalink) Old 01-23-2016, 07:21 AM
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I've also found this little dealie to be quite helpful, although I have not seen it manufactured by anyone other than Hazet. It accepts a bunch of bits, so it really useful in tight places. The model is 2664 in case there are others out there that like to spend too much for their tools.
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post #6 of 8 (permalink) Old 01-23-2016, 08:12 AM
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Quote:
Originally Posted by dlafever View Post
For hex-head screws I remember using a regular right angle hex wrench.

I used Mercedes oiler tubes when servicing the two M119 motors I had previously. You might get better information when working on this engine if you post in the W140 or R129 forums as there is a lot of knowledge swirling around over there.

on the r129 it is a piece of cake compared to an E420. the e420 has the engine "shoe horned" into the engine compartment and partially under the firewall.

On the R129, there is plenty of space to access everthing by comparison.
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--------His------------Hers-------

97 SL500 Imperial Red
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post #7 of 8 (permalink) Old 01-24-2016, 04:19 AM
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Quote:
Originally Posted by dlafever View Post
I've also found this little dealie to be quite helpful, although I have not seen it manufactured by anyone other than Hazet. It accepts a bunch of bits, so it really useful in tight places. The model is 2664 in case there are others out there that like to spend too much for their tools.
I had no idea just how expensive Hazet tools are!

(Now thinking of getting my wife a complete tool chest for her birthday)

Hazet Tools - Price Comparison, test reports and product ratings on Weluma. Find the best prices now!
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post #8 of 8 (permalink) Old 01-31-2016, 05:54 PM Thread Starter
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okay ill check that out. thanks
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