drop screw into engine

[lenardn730]

I have a yanmar 2000. I drop a small machine screw down through the air filter. I need info on how to get it out, can I pull the injector to fish it out or wiil I need to pull the Head.

 

[MIKE R]

I have a yanmar 2000. I drop a small machine screw down through the air filter. I need info on how to get it out, can I pull the injector to fish it out or wiil I need to pull the Head.

Did you try one of them magnets on a pole yoy may be able to get if like that.

 

[EE_Bota]

If you try a magnet, and it has to go around a curve, that can be a problem. Also, sometimes a magnet tries to stick to everything. I read somewhere that in those cases, one of the button magnets installed into the end of a piece of rubber hose can sometimes work.

 

[300UGUY]

Whatever you do, get it out. When I worked in a GM engine plant (30 years), the #1 cause of failure was "stock in the block" - somebody dropping something in a engine, usually during a repair sequence. We eliminated this by simply not repairing any engines! If it isn't 100% right, it gets scrapped. Our warranty dropped by 95%.

 

[winston1]

Do you know it made it's way into the cylinder? If not, you might try pulling the intake manifold and probing.

 

[mjw357]

Turn the tractor upside-down and shake it.

 

[California]

I have a yanmar 2000. I drop a small machine screw down through the air filter. I need info on how to get it out, can I pull the injector to fish it out or wiil I need to pull the Head.

DON'T CRANK THE ENGINE!!! Your question assumes the screw got past the valves into a cylinder, but I doubt it has. This is because that would have already trashed the engine. There is only a few thousandths between the piston and the head; just the thickness of the head gasket. So anything in there while running would have punched a hole in the piston.

The top of the intake on these is cast together with the aluminum valve cover. Since it is aluminum there shouldn't be a problem snaking a flexible magnet down there. It is also easy to remove the valve cover if you can't get a magnet down far enough. Note the valve cover gasket is flexible rubber and reusable so be gentle taking it off. After the intake/valve cover is off, you should be able to see into the passages and it should be easy to get your magnet in there. Maybe a tiny dental mirror would help.

Forget about pulling injectors, there are chambers below the injectors that have to be pressed out from the combustion chamber side before you have an opening that a screw could pass through.

 

[deepNdirt]

depending on the size and how heavy....any chance it could be sucked out with a strong shop vac adapted with a small rubber hose? just a thought

 

[California]

depending on the size and how heavy....any chance it could be sucked out with a strong shop vac adapted with a small rubber hose? just a thought

I like that. Blowing compressed air at the same time might get the screw moving around to where the vac can reach it. But devise some way to know for sure that the screw came out. Maybe put a screen where the tiny hose goes into the vac's big hose etc.

 

[smilingreen]

Trade it in......

 

[careyo63]

Had that happen at one of shops I worked at. The Tech ended up pulling the Head. On his time :ashamed: Was it just a Screw or did it have a Lock Washer also? Most all Bolts have Washers 0n Mech. Equip.

 

[Car Doc]

Pull the intake manifold off carefully watching for it to fall out then and check with a flashlight and magnet all around the intake valves and dont crank the engine as has been mentioned already. good luck

 

[California]

Intake manifold on these is just a couple of inch vertical hole cast into the valve cover. Here's a Photo. Like I've said elsewhere, these are old school, have half as many discrete parts as anything modern, and are pretty much trouble free because parts that don't exist can't fail.

Removing the manifold/valve cover improves access into the head, but shaking the screw out of the passages will require removing and inverting the head. (or just invert the tractor as mjw said above ). I think I would spend some time with a dental mirror and magnet. If that doesn't work, then a tiny vacuum hose (with screen). Then if I weren't absolutely certain that I got everything out, order a head gasket and disassemble the head.

 

[Car Doc]

Then lets hope its not a stainless steel screw or he wont get it with a magnet and then as long as he sees it other means can be done to get it like something sticky or a vacuum visibility will be slim looks like?


In this instance where there isn't an intake as such, pulling the head is more of a probability on this than more complex engines in this case or it looks that way anyway.

 

[bamboozled]

Get a bore scope and run that down the intake to see if you can find the screw first.

 

[deepNdirt]

Just wondering if you happen to get that screw out? and if so how?