After extensive pre-lubrication of the engine (liners & bearings), start the engine at low idle for less than one minute then stop it. Using an infra red thermometer, measure the temperature of the main and conrod bearings. Make sure that all bearing's temperature are nearly at the same level (...
Can some tell me what is the formula used to determine the clearances of bearings of diesel engines based on their diameters. The bearings I'm talking about are the main bearings for crankshaft, conrod bigend bearings, piston pin bearings etc... Regards WR
With the pre-lubrication ,oil temperature and jacket water temperature you've mentioned above, I do not see that wearing at start up is an issue specially that the engine is started on no load. For these type of engines running on HFO, wearing is more related to corrosion caused by the chemical...
Thanks all for your tips, however the piston is free now and was pulled off the liner all right (they have managed to jack it down by the cylinder head). The liner as well was pulled out to investigate a water leak from the sealing surface between the liner and the cylinder block. A small hole...
Mike,
Would it be better if a special chemical compound is sprayed around the gab between the liner & the rings to assist in dissolving the carbon and thereby moving the piston while the grease is on action? Do you have any idea what the commercial name of this compound could be?
Appreciate...
MIke,
Thank you very much for your valuable tip. The piston has in fact been projected about 10 mm out of the liner and the question here, would the greasing procedure as described be capable of moving a piston of a medium speed engine with bore & stoke dimensions of 320mm, 450mm ? However...
A friend of mine got the piston stuck up while he was pulling it out during major engine overhaul. He said that the engine was running ok before they started the overhaul. It seems that there was heavy carbon deposition on the liner that was not properly cleaned before they pulled the piston...
I think running the engine without thermostat may overheat the engine since in this case it would achieve only partial cooling. I would say, replace the thermostat.
However, want to know if this is a phenomenon that appeared sometime down the road of the engine life or it is there from day one...
Can any one tells me where can I find detailed description/information of Tier 1 thru Tier 4 emission control standards, i.e. limits of greenhouse gases, range of effected diesel engines in terms of hp/kw, application of effected diesel engines; marine/power plant/trucks etc..
Any helpful...
Gentlemen,
Let me give you some more information about this engine; it used for power generation, it’s output power is 3.85 MW, arranged with 16 V- type cylinders, rotating at 720 rpm and having bore diameter of 280 mm. As mentioned above, all liners are replaceable and therefore, neither...
Dear all,
Thanks for your responses. Yes, it is a liner that is replaceable in a medium speed diesel engine. The liner is still within the wear limits but new piston rings will be installed, is it necessary to hone the liner in this case using a honing brush ? Regards WR
I understand that honing of cylinder liner is not a routine work. Can someone tell me when it is necessary to hone a cylinder liner? And what is the correct procedure for honing a cylinder liner? Regards - wr
j2bprometheus is quiet write. The efficiency of a modern diesel engine can possibly be as much as 43 % but this is when the effect of turbocharging is considered. The 33 % which I previously mentioned, does not however take the effect of turbocharging into consideration.
The heat available in...
The application would be HVAC. Engine cooling water shall be used to preheat the feed water before an exhaust gas boiler, the generated steam will then be used to fire an absorption or adsorption chiller(s), this certainly would be used all year around. Has anyone tried a similar application ? WR
