Slow Speed Diesel Engines > Changfa Engines
Need help with Jiang Dong 1115
Zeppole:
Bought this engine new off Ebay last year and have it set up with an 11K Stanford type head. Last time I ran the unit (a few months ago) it ran fine. Getting ready for winter so I thought I'd best fire it up and make sure everything was working correctly. Unfortunately it has issues.
The problem: engine starts easy enough but billows white smoke, occasionally backfiring and pulsating rpm.
What I've done so far:
1. Drained fuel and replaced with fresh diesel. No love.
2. Bled all the lines -- I can hear the injector pump creaking. No love.
3. Pulled the injector -- connected to fuel line and turned over. Seeing 3 perhaps four fine mist sprays from the injector. Re-install, bleed lines, No love.
4. Torqued head bolts. No love.
I know that white smoke usually indicates unburned fuel and/or air in the lines. Compression seems to be good. Fuel rack seems to work appropriately. Can't figure out why the problem is not getting resolved.
Next step would be pulling the head and replacing the head gasket but I really don't want to do that before getting some input from members of the forum.
I understand that the injector pump is timed with shims but honestly have no idea where and how to time the pump.
Any input would be greatly appreciated.
dieselspanner:
Before ripping into the head, try this.....
Check the air filter, and the level of the oil, you may well have a stuck ring or two.
Once the engine is running use a spray bottle to squirt water into the intake, over 5 minuets get a pint or so - half a litre - down it, don't do it to the point that the motor stops, but slowing it down a bit is ok, then let it run under load, give it 5 minuets.
Cheers
Stef
Zeppole:
Tried your suggestion but no love. Beginning to wonder if the injector pump is the problem -- is there some way that the injector pump over fuels the engine? I have literally clouds of dense white smoke!!
sirpedrosa:
Hi Zeppole, and all members
That white smoke sugests air shoke somewhere, I mean, the fuel is ok (and you tested the injector, OK), but the amount of air is not enough to burn the fuel injected completely.
Maybe intake valve not opening totaly!(?) - [Forget this one, it's non sense] - See rather intake manifold!
Keep shouting, and post to us.
BR
VP
mike90045:
Unless mice removed shims, it's unlikely the injector timing would have changed, I'd not mess with that.
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