Hi Jon,

There are some odd things about this engine model. I think the big canister at the side of the engine, with the small pulley on the front, is intended to represent a belt drive oil pump. To support this idea: In the side view the oil suction line is shown going from the sump to a point midway down the big canister, and there's another line next to it that may be the oil supply line. I've never seen an engine laid out quite like this but that does not mean it isn't so, or it could just be artistic licence of whoever laid the engine CAD model. Maybe this engine has a large secondary oil filter (maybe centrifugal as you mention) built around the oil pump which would usually be much smaller than the shown canister.

It might be wiser to find a CAD model of a simpler more conventional engine for your website, if you're teaching the basics. If you could find a fuel injected non turbo 4 cyl gas engine as found in many small cars, the student would be able to find a real one under the hood of many common cars to compare it with.

They'd be looking a while to find a real one exactly like your CAD model I think, unless it's a commercial truck engine – I don't see those much. JD

The pictures aren't showing, but from your description of its position and appearance I think you're referring to the alternator.

<edit> Ah! picture is there now, yes, it is the alternator.

Neil

Edited By Neil Wyatt on 11/02/2017 10:22:37

If you read teh opening post it is Jon that has labled the parts, but he needs to know what the item I pointed to in pink is. I'd say a pump

I'd go with Neil's alternator but I don't recall seeing an alternator with an oil feed going through it. Still it is a bit of an up-market engine to start with as a learning aid and of course you can't see the really interesting bits like pistons, con-rods, crankshafts and the like!

John

Edited By Journeyman on 11/02/2017 10:53:18

Well, item 23 (pipe connecting the sump to that item is labelled oil suction pipe connecting the sump to the lubricating oil pump or words to that effect. So I guess it is the oil pump although it looks a bit big for that.

Russell.

Item 23 seems to be a pipe that runs between the sump and the item in question.

If you click on item 23 it says: "Lubrication Oil Suction Pipe. The suction pipe connects the sump and lubrication oil pump (suction side)"

So I would say it's a lubrication oil pump. If you look at the other pipe from the item in question, it seems to go to the side of the bock, maybe feeding oil galleries.

Regards

David

But the labels have been put on by the OP who doesn't know what it is, so we can't rely on what the labels say.

The original model (with internals) is here:

http://www.cgtrader.com/3d-models/vehicle/part/diesel-turbo-engine-with-interior-parts

It's the first hit if you put 3D model V6 engine into google images. It's also on some other 3D sites.

Looking at the level of detail I guess it's not an actual engine. There's a complete lack of fixings and six separate cylinder heads is unusual for a real engine, although some parts are modelled well otehrs are very simplified. (no valve guides.

So it may just be artistic licence.

As it's not a real engine, then its pretty useless as a training aid, so perhaps Jon you should start again?

That 3D model costs $350 – $450 to buy; if it's been bought, I doubt it will be replaced in a hurry.

Neil

It's not an oil pump then. They either have gear pumps (8-shaped) or round rotor pumps, but the round ones are fitted directly on the crankshaft.

usual place for an alternator seems to be on top.

I can't seen any pictures of engines with anything fitted where that cylinder is on the 3D model.

Neil

At the risk of spoiling the fun …

This might be £14.99 well-spent

**LINK**

http://www.agrimanuals.com/mercedes-benz-engine-om421-om422-om423-om424-om421a-om422a-om423a-om424a-om421la-operators-manual-11789-p.asp

MichaelG.

On 2nd thoughts, I'd like to change my vote to Air-Con Compressor!