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Message started by Moarpower on 09/19/22 at 19:37:26

Title: Engine flush suggestions.
Post by Moarpower on 09/19/22 at 19:37:26
Hi guys.

I'm going to get my 87 back together with the upgraded starter gears.
When I drained the oil there was clear evidence of metal from the broken gears but also so very fine glitter in the oil.

What process would you suggest for a complete engine flush before I start riding it seriously.

Will just filling, running and draining a few times be sufficient?

Title: Re: Engine flush suggestions.
Post by verslagen1 on 09/19/22 at 20:42:31
unfortunately... metal doesn't float.
so you need something that will carry the bits down to the drain.
oil is the stuff that's made to do the job.
I got a pump that will pick it up, filter it and direct it where it'll do some good.
stick a magnet in the drain and pull the bits out.

Title: Re: Engine flush suggestions.
Post by justin_o_guy2 on 09/19/22 at 20:45:28
Do you have a compressor?

Title: Re: Engine flush suggestions.
Post by Moarpower on 09/19/22 at 23:09:35

140710110E0305070C53620 wrote:
unfortunately... metal doesn't float.
so you need something that will carry the bits down to the drain.
oil is the stuff that's made to do the job.
I got a pump that will pick it up, filter it and direct it where it'll do some good.
stick a magnet in the drain and pull the bits out.


I have removed all the large pieces. Found all the teeth. What's left the very fine glitter in the oil.

Title: Re: Engine flush suggestions.
Post by Moarpower on 09/19/22 at 23:10:08

3B242225383F0E3E0E36242863510 wrote:
Do you have a compressor?


I don't have one currently no.

Title: Re: Engine flush suggestions.
Post by justin_o_guy2 on 09/20/22 at 00:30:08
Then I guess you could get a few cans of brake parts cleaner,
If you're going to be spraying a lot of that stuff, have a fan blowing it away from you.
I have a painters mask,with replaceable filter elements, about thirty bucks. I can't tolerate those sprays,
I'm hoping you have the case sides off,,

Title: Re: Engine flush suggestions.
Post by Moarpower on 09/20/22 at 00:40:33
:'(
332C2A2D30370636063E2C206B590 wrote:
Then I guess you could get a few cans of brake parts cleaner,
If you're going to be spraying a lot of that stuff, have a fan blowing it away from you.
I have a painters mask,with replaceable filter elements, about thirty bucks. I can't tolerate those sprays,
I'm hoping you have the case sides off,,


Yes I have the case sides off and clutch basket removed. I have used a magnet to get the bigger parts out so now it's just some very small pieces and finer metal particles.

I filled it was some clear spirits and rock it back and forth and drained once.

So you mean just park it with the drain hole at the lowest point and try to just spray it all out and toward the hole ?
I assume I'd have to do and fill with oil run and repeat to get most of it out?

Title: Re: Engine flush suggestions.
Post by justin_o_guy2 on 09/20/22 at 02:56:51
If you still have the sides off, I'd shoot it with parts cleaner. You should be able to rinse about everything you can see with two cans,right?
IDK how much junk you found in the oil. You are the only one who can see it.
Gotta ask yourself how much is hiding in the transmission? Can you shoot that area? I've never had both sides off.
I'm pretty fond of diesel inside a nasty motor,,
Maybe slapping the sides on, dumping diesel in , no spark plug, use the rear wheel to spin it over a few times, if a chunk is in the gears it otta shut you down.
Shake it, roll forward and back. Drain into a clean pan.
Rinse and repeat as needed.

I'm just shooting in the dark never done this, if someone has a tried and true system, please, share.

Title: Re: Engine flush suggestions.
Post by Moarpower on 09/20/22 at 03:45:11
Yeah with both sides off, the bottom of the engine is still enclosed bi it has a couple of small holes a little smaller than a coin.

Title: Re: Engine flush suggestions.
Post by justin_o_guy2 on 09/20/22 at 08:05:41
I would have a oil drain plug with a magnet in it before it hits the road.
You know what it takes to get stuff rinsed out. If it's downhill, it's not coming out. If the transmission is not above the flat of the bottom of the case, whatever is in there will stay in there until you work it out. I don't remember what it looks like.
I'd do what I could with the spray can, slap the sides on, it's okay if they ooze a little, I'd fill it up with diesel, no spark plug, if you have to hoist the rear wheel to make the transmission flush into the front, hoist it, spin the tire,in gear.

Drain into a clean pan
Maybe through a piece of t shirt
See what you get.

If you don't pollute the diesel you can rerun it.

Flush,till you stop getting junk.
Pull the sides, inspect,clean.

It's like getting out of a wet swimming suit. No instructions, you start going at it and you just keep working till you get it.

Title: Re: Engine flush suggestions.
Post by DragBikeMike on 09/22/22 at 03:02:31
I know you said you found all the teeth, but I am compelled to ask, are you confident that you retrieved "ALL" the teeth?

Title: Re: Engine flush suggestions.
Post by Moarpower on 09/22/22 at 06:25:37
:D
10161965676064540 wrote:
I know you said you found all the teeth, but I am compelled to ask, are you confident that you retrieved "ALL" the teeth?


I counted them all and have all of them. But I am not confident that I have all the fragments that were chipped away. That's why I need a good way to flush it.

Title: Re: Engine flush suggestions.
Post by justin_o_guy2 on 09/22/22 at 07:39:25
Don't forget to clean the clutch pack up.


If you still have the filter you might gut it and see what kinda junk it was filtering out.

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