Yanclone/Suntom 186F No compression fault finding & repairs

[old clunker]

Some final thoughts!...

When it comes to monitoring engine compression in these "Yanclone" engines, which essentially monitors diesel engine health, I could find no cylinder head adaptors/compression testing tools for these engines - they appear to be for petrol engines only; as the "Yanclone" fuel injector is a tight interference push fit into the cylinder head, with no screw threads available to screw any adaptor into! Plus there are no figures readily available, what the typical compression pressure should be, even if you could fit a compression gauge to the cylinder head to check it!!!
So it comes down to trying to know what is normal compression and operation of the diesel engine. If the engine is very difficult to turn over, and the compression feels very high, plus it starts easily, it must be a good engine, and in good condition. If the starting, and/or running at high revs becomes unreliable, then the compression could be suspect, and needs investigation.

One way of helping preventing this, is to use a diesel injector cleaner, when the engine performance starts to become suspect. Unfortunately, I bought some but the engine expired beforehand, and I didn't get a chance to use it!
I was recommended to use Forte diesel injector cleaner, as apparently Vauxhall mechanics use it when servicing their car diesel engines, to restore performance. I've been told that it works very well, when added in high concentration to a small amount of diesel, through the fuel tank. It mixes and burns just like diesel and helps unblock the injectors, and cleans up the piston crown, rings and cylinder head. So a useful thing to use, if the diesel engine's performance is suspect, and is supposed to return the engine's performance back to original - allowing for some engine wear though!!
I'll be using it when my engine's performance starts to drop off - hopefully I'll do it in time, for a change!

[coachgeo]

yanmar adapter for compression tester

http://www.hoyetractor.com/mm5/merchant ... Code=Tools

http://klineind.com/COMPRESSION-TEST-AD ... 3600Y.html

[old clunker]

Thanks for the information Coach, pity that it's not available in the UK! and it's quite expensive also with shipping costs, for just occasional use - not including the diesel compression gauge as well!

I'll leave it for others to experiment with....

[coachgeo]

Thanks for the information Coach, pity that it's not available in the UK! and it's quite expensive also with shipping costs, for just occasional use - not including the diesel compression gauge as well!

I'll leave it for others to experiment with....

read in one of the tractor threads on this topic that folk had one taken one of the ends that come with the guage set up (cheaper like Harbor Freight) and had them turned down and the end refitted to work with their yanmars.

Alot of the discussion I came across on this was actually from boat boards. Being that there is coast on both sides of the ocean Im betting yanmar powered boats are over there too. Google probably automatically gives me more US results being that Im US. Try a search in your country so it will automatically default to your side of the ocean. Use "Adapter" in the search since these seem to be sold separately as an adapter to fit to standard diesel compression gauge. You can also aim search toward marine or tractor yamnar to see if that helps narrow it down.

[old clunker]

Just an update on the engine repair/running so far. The engine has run really well last year, though I didn't use the bike as much as I would have liked, due to the lousy weather! The bike got through the annual MOT test in December with no problems at all, and the engine doesn't smoke much at all. The tester was quite impressed with the diesel engine running!
This year I've hardly used old 'Clunkie', but it started first time this month in the cold weather, and ran well. Just have to do another 300 miles approx, until the next engine and primary drive oil change.
So that's the news so far concerning my Suntom 186F engine and it's reliability. Will let you know when I start to run it on biodiesel eventually.

[alexanderfoti]

Just an update on the engine repair/running so far. The engine has run really well last year, though I didn't use the bike as much as I would have liked, due to the lousy weather! The bike got through the annual MOT test in December with no problems at all, and the engine doesn't smoke much at all. The tester was quite impressed with the diesel engine running!
This year I've hardly used old 'Clunkie', but it started first time this month in the cold weather, and ran well. Just have to do another 300 miles approx, until the next engine and primary drive oil change.
So that's the news so far concerning my Suntom 186F engine and it's reliability. Will let you know when I start to run it on biodiesel eventually.

All good news then. Wonderful.

[old clunker]

Thanks alexanderfoti - there's always hope for these Yanclone engines!

Another excuse why I've been away from here for some time, is that I've also been very busy since the start of this year on another project, a 1970 Mobylette which I picked up cheap at the end of last year. Hopefully it should be quite quick for it's moped size (unrestricted 2 stroke engine and based on a 'sports' model) and should be a laugh to ride locally. The engine is quite a bit different from the diesel, and can be picked up with one hand!!
It's needed a lot of work on the engine, and on the frame, in my cold (fridge impression) garage this year, but I hope to have it back together and on the road in April.

[alexanderfoti]

Thanks alexanderfoti - there's always hope for these Yanclone engines!

Another excuse why I've been away from here for some time, is that I've also been very busy since the start of this year on another project, a 1970 Mobylette which I picked up cheap at the end of last year. Hopefully it should be quite quick for it's moped size (unrestricted 2 stroke engine and based on a 'sports' model) and should be a laugh to ride locally. The engine is quite a bit different from the diesel, and can be picked up with one hand!!
It's needed a lot of work on the engine, and on the frame, in my cold (fridge impression) garage this year, but I hope to have it back together and on the road in April.

aha I know the feeling well! Currently doing up a 2004 Vespa ET4 that somebody left outside for 3 years. Its much the same story, too cold and no garage to do the work on, the diesel bike is getting all the attention at the moment!

I couldnt shift the 200cc diesel I have, so there is maybe hope for that for a diesel powered scooter at some point in the future. Not sure yet.

[bf109v7]

Thank you very much for this very interestig thread. I have a M.C. KAWASAKI with acording to label 556 ccm. From the outside it looks like your engine, so I think inside it will not look much different. In my manuel it says that I should change the pistin rings after 1000 hours or 1 year.
And I did not see on your pictures where the oil is going up to the rockers. Could it be that it goes through the pushrods like on the VW beetle?
Alex

[bf109v7]

I forgot: You wrote: Could it be that they save on sealant. This would be normal, all companies do this.
Alex