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Diesel Engine Maintenance

Diesel Engine Maintenance

Common Diesel Engine Maintenance techniques performed on Diesel Engines from RPM Diesel Engine Co. How to Bleed or drain a diesel engine and diagnosing engine over heating issues!

Removal of air from the engine’s fuel system is very important and must be done after doing things such as changing a fuel filter because it introduces air into the system and this must be removed and eliminated from the fuel lines or else the engine will not start or it will start but it will stop running very quickly. To bleed the air out of the engine you must use what is called the fuel lift pump to manually pump the air out of the system.

Bleeding the engine should be only done after you have checked all the hoses and connections to make sure there is no place where there may be leaks that could allow air to be introduced back into the system which may give you some kind of false start or just get in the way of diagnosing an engine no start situation. You need to loosen the vent bead screw or you can just loosen one of the clamp that is securing a hose but it is recommended to use the vent designated to bleed the air so you don’t accidentally get air back into the system after getting it out.

After you have loosened the vent you need to find the manual pump on the system which looks like a lever normally, you then actuate the lever pumping it several times or until you see fuel coming out of the vent then you can tighten the vent back to make sure you clean up any excess fuel which may have spilled onto the floor or onto any other surfaces in the immediate vicinity. If you try to start the engine and it is still having problems, stuttering or won’t start altogether or it dies shortly after you know there is still air in the system and you need to bleed the air again and then try to start it again.

If you are having overheating issues with your engine there may be a blockage in you raw water system intaking debris clogging the filter from the surrounding waters. If you have cleaned the filters checked the lines and there is still issues with getting water to the engine check further up stream with the impeller it may have swelled from seawater or broke down blocking the flow with parts that may have broken off and caused a blockage and overheating to occur. Many times a broken impeller is a symptom of another problem and not the main cause such as debris slowly entering into the system and causing the malfunction through a broken intake port or from the breakdown of old hoses, parts or filters clogging the system upstream.

So remember if you’re changing the impeller make sure that it is not another issue that is causing the problem. If not you could end up replacing the impeller again or just get stranded at sea thinking it’s another problem over looking a recent repair that was not done properly. RPM Diesel engine maintenance can bleed your engine and diagnose any engine problems that you may be experiencing in the engine room or with the performance of your vessel on the water. If you have any questions concerning Diesel Engine Maintenance give us a call. 800-660-6304 http://rpmdiesel.com/

Diesel Engine Maintenance

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