Dropped pin into timing chain cover and probably sump - options? - Page 2 - Mercedes-Benz Forum
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post #11 of 57 (permalink) Old 08-02-2019, 07:35 AM
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If you look at the pic there's really nothing in the way between the distributor gear hole and the sump unless it hung up on the timing chain cover which is doubtful. So I probably won't see it if it's sitting in 10 qts of oil.
Some time ago, I took this pic on my 72 M117 engine. It does't look as though there is anything in the way. Is that the pan at bottom or the chain cover? It's probably in sump, but it would be a good idea to get it over near drain and try and remove. Didn't know those pins were S/S, but not likely non-magnetic types which are not as strong.


Last edited by MBGraham; 08-02-2019 at 07:37 AM.
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post #12 of 57 (permalink) Old 08-02-2019, 07:47 AM Thread Starter
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Some time ago, I took this pic on my 72 M117 engine. It does't look as though there is anything in the way. Is that the pan at bottom or the chain cover? It's probably in sump, but it would be a good idea to get it over near drain and try and remove. Didn't know those pins were S/S, but not likely non-magnetic types which are not as strong.

I didn't drop the pin that holds the chain guide. The pin that dropped was a smaller pin I was using to drive the chain guide into the cover.
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post #13 of 57 (permalink) Old 08-02-2019, 09:51 AM
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I didn't drop the pin that holds the chain guide. The pin that dropped was a smaller pin I was using to drive the chain guide into the cover.
Ok, so hopefully pin is magnetic!
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post #14 of 57 (permalink) Old 08-03-2019, 03:22 AM
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This might sound silly but did you view it go down this hole, or just thinking it did ?. Just look on the floor around the base of the engine just in case it just fell to the floor. If you are right, and it did fall right down in to the sump remove the oil and get your bore scope in the drain hole to fish it out .It happens to all of use .You know its like as if there is some one next to you that dont want you to do the job. Good luck- you will get it out .
Its Her Car likes this.
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post #15 of 57 (permalink) Old 08-03-2019, 06:03 AM
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When we dropped the oil pan to get the front plate off in order to replace the lower guides, we found half of one of the uppers in the sump. Yikes! But I also noticed that, yes, the oil pickup DOES have a screen on it.
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post #16 of 57 (permalink) Old 08-03-2019, 09:56 AM Thread Starter
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I couldn't get my borescope through the top. The diameter is too big to fit. It definitely fell in........I saw it sitting beside the the distributor gear and when I tried to grab it with my retrieval tool....POOF. Next step is to drain the oil. One of the threaded holes for my thermostat housing in my reman water pump is all focked up.....it came that way as I could not thread the bolt in with my fingers. Tried a tap and lost too much material to get a good bite. Time for a helicoil kit but I'm gonna need to find one with a long enough drill bit to get down to the back left bolt. I really don't wanna pull the water pump back off....uggg. My back is hurting...time for a long break.
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post #17 of 57 (permalink) Old 08-03-2019, 07:20 PM
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Originally Posted by MrSpock View Post
I couldn't get my borescope through the top. The diameter is too big to fit. It definitely fell in........I saw it sitting beside the the distributor gear and when I tried to grab it with my retrieval tool....POOF. Next step is to drain the oil. One of the threaded holes for my thermostat housing in my reman water pump is all focked up.....it came that way as I could not thread the bolt in with my fingers. Tried a tap and lost too much material to get a good bite. Time for a helicoil kit but I'm gonna need to find one with a long enough drill bit to get down to the back left bolt. I really don't wanna pull the water pump back off....uggg. My back is hurting...time for a long break.
Aren't you glade the 107 has a big drain plug.
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post #18 of 57 (permalink) Old 08-05-2019, 01:04 AM
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My back is hurting...time for a long break.
Those " one step forward 6 steps backwards" moments have a habit of hurting backs as well as trying your patience .
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post #19 of 57 (permalink) Old 08-05-2019, 07:32 AM
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For what it’s worth,
I dropped the u-shaped chain-lock lock when I replaced the timing chain on my 560sl 2 years ago. It fell into to netherworld of the oil pan.
Never seen or heard from again.
So far, so good.........
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post #20 of 57 (permalink) Old 08-05-2019, 03:36 PM
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Hmm, reminds me to be super extra uber careful when Ill be doing my timing later this week!

That said probably most of our 30-40 year old engines are driven around with bits and pieces in the oil sump...
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