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Question about plastic timing chain guide pieces in oil pan.

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Question about plastic timing chain guide pieces in oil pan.

Old 01-22-2019, 06:27 PM
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Question about plastic timing chain guide pieces in oil pan.

Background: I recently discovered that my drivers side timing chain guide broke. One half of it is still intact and attached. I was able to fish a large chunk of it out of the engine, but I suspect there are more pieces that fell down into the oil pan. My local mechanic will be replacing the chain with a dual row conversion kit I got from 22re performance. He is going to remove the head to install the new chain, but he is not touching the oil pan. He said that I should not worry about the pieces that broke off, as they will just sit down there, but that if I really wanted he could pull the oil pan also (for more $$$ of course).

Question: I am unfamiliar with how things are arranged down there, and I am concerned about having plastic pieces in my engine. My mechanic says they just get caught on the screen and that it's fine to leave them until I need to remove the oil pan for some reason. I can't really afford the extra money to have him do the oil pan, nor do I have the tools right now to do it myself. Should I trust him and just leave the chunks down in there peacefully resting for now?

Thanks..
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Old 01-22-2019, 07:36 PM
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Yup, trust him. If the pieces were ground to bits, and there were enough of them, they could clog the oil pump pickup screen. But that doesn’t tend to be how they fail. If the engine were out, id pull the pan. Chevy used to use plastic cam gears that came apart. Ive found a few of those in oil pans but didnt create a problem.
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Old 01-23-2019, 02:34 AM
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I had the same half of the driver's side guide break off & decided to drop the pan which is a PITA on IFS trucks. The broken piece was laying in the bottom of the pan intact and would not have caused any issues at all if I left it there.

Last edited by Paul22RE; 01-23-2019 at 02:37 AM.
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Old 01-23-2019, 04:56 AM
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My OCD would have me pulling the engine to remove the pan.
But as others have said: it won't cause an issue in 99.9% of cases.

It's kinda like the "red tip of differential fluid bottle" fell into my diff.
OCD people: remooove iiiit!
Everyone else: "It will just get mashed to bits. Leave it."
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Old 01-23-2019, 10:48 AM
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I agree with the above.

The right way to do the timing chain replacement is to remove the oil pan, clean it out, reseal and reinstall. That is the way I would personally do it if I had to replace the chain on my engine.

Like ev13wt said, my OCD would force me to remove the pan, but realistically, it would probably be just fine to leave it alone. Any pieces small enough to circulate through the engine is likely already in the filter and the larger chunks just stay in the pan.

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Old 01-23-2019, 03:31 PM
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If you can’t afford it, go with it. When my buddy did mine he said there was all kinds of relics in the pan
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Old 01-24-2019, 06:48 AM
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Haha that's all you found?
I found chunks of an old timing chain in the oil pan of my old 84
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