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Discussion Starter #1
While I was replacing the water pump I decided to replace the timing chain guides, sprockets and chain since I had most of the stuff out of the way. I was putting in the last driver side upper guide pin with a hammer and small metal 1.5" dowel when the dowel jumped and fell into the distributor opening. I could hear the clink clink sound as it fell down behind the timing chain cover and most likely into the sump. idiot me had a rag in that opening for the last 3 days and decided to pull it to do some cleaning up. The manual was not clear to me as to the oil plumbing/flow but I think there is a pick up screen in the sump and I should be ok. My first thought is just leave it there as it will not get through the screen. Is there any reason to worry if the dowel is rolling around the sump or should I prioritize getting that thing outta there before I fire up the car?
 

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Discussion Starter #3
Yep, the oil pan is full. Not sure what my chances are of it getting rolling down to the drain hole if I change the oil. It is currently on ramps so maybe that would increases the odds........ Maybe I should just wait until it's ready for an oil change in ~2000 miles and take my chances. If there is a strainer/screen I should be ok.........yes?
 

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Yep, the oil pan is full. Not sure what my chances are of it getting rolling down to the drain hole if I change the oil. It is currently on ramps so maybe that would increases the odds........ Maybe I should just wait until it's ready for an oil change in ~2000 miles and take my chances. If there is a strainer/screen I should be ok.........yes?
I believe there is, but I wouldn't take the chance to save money on something like that.
 

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Discussion Starter #6
Ok......I'll drain the oil and if it doesn't come out I will put a borescope in the drain hole with a small hook or magnet to see if I can hopefully find it and retrieve. It is 1.5" long and slightly smaller than the diameter of the timing chain guide rail pin threads.
 

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Probably a stupid question but have you tried fishing around in the hole with a thin extendable magnetic pick up?
Did you mean down the hole that it fell through? Might be worthwhile, but lot's of steel parts that the magnet could stick to. A thin borescope might be worth trying down the distributor hole, but is there a straight passage down past the gears? Through drain hole might work if pickup can be bent so it can 'scan' the bottom of the sump.

If the pin is in the lower pan, and the pan is aluminum, it might be possible to use a strong magnet against the pan and drag the pin close to the drain hole (after first draining). Bit hit or miss, so knowing where pin is with borescope would help.

Good luck with it.
 

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Discussion Starter #10
I'll try my borescope from the top first through the distributor passage. Hopefully it fits. Not sure if the end of my borescope will fit in the oil drain hole. The pin is stainless steel so it's hit or miss on if a magnet would work. 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. Is there a screen on the oil pick up port in the sump?
 

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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.

 

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Discussion Starter #12
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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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 .
 

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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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Discussion Starter #16
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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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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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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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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