required : Oil Pump Tensioner Rail instllation guide - Mercedes-Benz Forum
 
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post #1 of 10 (permalink) Old 08-03-2018, 12:25 AM Thread Starter
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required : Oil Pump Tensioner Rail instllation guide

dear Benz world members
I want some guide in how to install Oil Pump Tensioner Rail in the right way . I removed the front timing cover along with the oil pump. also I removed booth panes . I will install new rail and chain . I have done engine heads, timing chain+ all rails, back cover . only the oil chain pump rail needed to be installed in the right way and the rest is super easy . following is a picture that describe my question.
Thanks in Advance
Hamza
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post #2 of 10 (permalink) Old 08-03-2018, 01:44 AM
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Welcome to the forum, I am sure our resident experts will chime in.
In the meantime, here are some old threads from the forum archive (google custom search, top right) re M117 oil pump chain & guides https://www.benzworld.org/forums/gts...chain%20guides
From the clean look in your picture, it looks as if you are well on your way.

It has been quite a few years since we did the M117's top and bottom chains, sprockets, and guides + rebuild oil pump at the time.
Earlier removal of lower and upper oil pan revealed the grate under the oil pumps suction part to be surprisingly full of crud and plastic bits.

Before all that, I had unusual wear of distributor rotors, finally diagnosed to worn out snail gear also driven by the same chains, which wasn't too hard to change with chains/guides/oil pump removed.
That's what you lower the distributors drive on the bottom into (before adjusting ignition timing).
Best of luck.

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post #3 of 10 (permalink) Old 08-03-2018, 01:44 AM
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Welcome to BenzWorld Hanza!

Here is all I could find in the MBCDs covering replacement of that item.. It is at the bottom of the PDF..

I wish there was more..

MBL
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91 500SEC EURO Germany
87 560SEC USA 49 State Version
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post #4 of 10 (permalink) Old 08-03-2018, 08:44 AM
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In your picture the guide is resting in the wrong hole. The rail should be able to swing back and forth. See attached picture. I replaced the oil pump chain rail when I had the timing cover off on my '88 560SEC. Also replaced the chain with an IWIS that had the removable link. Getting the cover back on and ensuring the guide is not getting in the way is a little tricky but doable. Of course it is made much easier if the you have the upper sump off. Once the cover was back on I turned the motor over by hand to wind the chain on to the crank sprocket. Next I installed the guide tensioner spring, placed the oil pump gear in the chain and while pulling down on the gear, mated it to the oil pump. I bolted the oil pump to the block followed by the bolt that holds on the oil pump gear. Let me know if that helps and if you have any other questions.
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post #5 of 10 (permalink) Old 08-03-2018, 10:58 AM Thread Starter
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Quote:
Originally Posted by HardwayMB View Post
In your picture the guide is resting in the wrong hole. The rail should be able to swing back and forth. See attached picture. I replaced the oil pump chain rail when I had the timing cover off on my '88 560SEC. Also replaced the chain with an IWIS that had the removable link. Getting the cover back on and ensuring the guide is not getting in the way is a little tricky but doable. Of course it is made much easier if the you have the upper sump off. Once the cover was back on I turned the motor over by hand to wind the chain on to the crank sprocket. Next I installed the guide tensioner spring, placed the oil pump gear in the chain and while pulling down on the gear, mated it to the oil pump. I bolted the oil pump to the block followed by the bolt that holds on the oil pump gear. Let me know if that helps and if you have any other questions.
hi, this rail is the old one the new one will be installed according to your instructions
yes I have : I want to know is this rail must be swinging or positioned then tighten the bolt so it will stay in one place ?
in my case I have several options since front cover + bottom pan+ secondary pan are removed
Quote:
Originally Posted by MBL87560SEC View Post
Welcome to BenzWorld Hanza!

Here is all I could find in the MBCDs covering replacement of that item.. It is at the bottom of the PDF..

I wish there was more..
MBL
hi , I will have a deep look @ it
thank you
Quote:
Originally Posted by Teutone View Post
Welcome to the forum, I am sure our resident experts will chime in.
In the meantime, here are some old threads from the forum archive (google custom search, top right) re M117 oil pump chain & guides https://www.benzworld.org/forums/gts...chain%20guides
From the clean look in your picture, it looks as if you are well on your way.

It has been quite a few years since we did the M117's top and bottom chains, sprockets, and guides + rebuild oil pump at the time.
Earlier removal of lower and upper oil pan revealed the grate under the oil pumps suction part to be surprisingly full of crud and plastic bits.

Before all that, I had unusual wear of distributor rotors, finally diagnosed to worn out snail gear also driven by the same chains, which wasn't too hard to change with chains/guides/oil pump removed.
That's what you lower the distributors drive on the bottom into (before adjusting ignition timing).
Best of luck.
hi thanks for your important notes especially the rotor ware I will inspect it tomorrow morning. my main reason to rebuild , if we can call it that way , is that the engine has worn spark plug threads plus idel issues , but when I took the heads off I was happy I did that because I have retired gaskets. I will make another thread about my rebuild and I will mention important things that I face while doing this job
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post #6 of 10 (permalink) Old 08-03-2018, 11:06 AM
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The rail swings on the dowel. It needs to be in the down position once the front cover is installed. I still had the upper sump on my engine so it was a little tricking keeping the rail below the crank but above the bottom of the timing cover so it could slip over the top of the sump.
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post #7 of 10 (permalink) Old 08-03-2018, 11:35 AM Thread Starter
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Quote:
Originally Posted by HardwayMB View Post
The rail swings on the dowel. It needs to be in the down position once the front cover is installed. I still had the upper sump on my engine so it was a little tricking keeping the rail below the crank but above the bottom of the timing cover so it could slip over the top of the sump.
got it
I also forgot to mention that I bought the IWIS chain that had the removable link which will make the job easier .
my plan will be as follows : (correct me if I am mistaken please)
first I will install the rail in front cover tail facing down. next oil pump after inspection will be installed in the front cover. after that I will hang the chain in the crank shaft sprocket and the two ends of the chain will be facing downward ,toward the pump. then I will fit back the front cover .finally, crank shaft sprocket and oil pump sprocket will be joined with the chain.
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post #8 of 10 (permalink) Old 08-03-2018, 07:42 PM
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Your plan is 99% correct. You will want to join the chain together and then attach the sprocket and chain to the oil pump. You will have to pull down on it while working it on to the pump to overcome the spring of the chain rail. Let us know how it works out.
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post #9 of 10 (permalink) Old 08-04-2018, 04:51 AM Thread Starter
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hi friends
today i installed the rail , pump and chain . please have a look @ the video and confirm my work
thanks
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post #10 of 10 (permalink) Old 08-05-2018, 05:07 AM Thread Starter
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up for video revision post #9
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