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Old 02-12-2012, 09:38 PM   #1
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Smile Cummins Engine Start-up After Extended Storage

I have a 2001 Monaco Dynasty with an ISC350 engine and am curious as to the best procedure to start up a 2001 Cummins ISC engine that has not been started since last fall. From reading the Cummins ISC Operators and Maintenance Manual it claims to start the engine, but make sure it doesn't run for more than 15 seconds without oil pressure. But I wan to be reassured that I don't have a cold start that allows the engine to run too long without oil pressure.

I have read a lot of comments that indicate the fuel solenoid can be de-energized so that the engine will crank but the engine will not start. If this is the preferred method, what is the proper way to perform disconnecting the diesel fuel solenoid on this engine without fearing any damage to electrical or fuel components or the ECM?

I have also read that some folks indicate the engine will not start until the ECM receives a signal that there is sufficient oil pressure, which I believe may hold true for the newer ISC engines beginning in 2007 that are equipped with an advanced ECM, a VG Turbo and DPF emission system.

I know from past experience that my 2001 ISC engine will start before there is oil pressure established, as it will typically start within a couple of seconds.

That being said, is there a way to easily de-energize the fuel solenoid so I can crank the engine until it builds oil pressure, then turn the ignition off and re-connect the fuel solenoid, then start the engine as you would normally do.

After thinking about a procedure to build oil pressure prior to engine starting I am curious if anyone has built oil pressure without starting the engine by doing the following:
1. Make sure the ignition switch is off.
2. Turn the battery disconnect switch on.
3. Touch a jumper wire between, a. the hot side of the battery and b. the input terminal coil of the starter solenoid coil. This will energize the starter and begin cranking the engine but it will not start since the there is no power to the ignition system.
4. Continue to hold the jumper wire so the engine cranks for about 4-5 seconds to build sufficient oil pressure, then release the jumper wire.
5. Now that oil pressure has been established in the lube oil system, the engine can be started as it would normally be done with the ignition switch.

Does anyone have any comments as to what you have done in the past to establish generating engine oil pressure before actually starting these Cummins engine after the RV has been in storage for an extended time.

Thanks for any feedback as I would like to do what is absolutely the best for my diesel engine.

Yukon Jack
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Old 02-12-2012, 09:50 PM   #2
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I don't see how a long storage time would effect oil pressure build-up time. On some engines that have oil filters mounted horizontally, a defective anti-drainback valve in the filter can cause the filter to drain partially. This usually delays full pressure build up for a few seconds at most.
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Old 02-13-2012, 12:42 AM   #3
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Perhaps a call to Cummins would help...they are the experts on these things.

I tend to agree with bluepill, however. Not sure there would any difference in oil pressure build up time between an engine that sat for 4 weeks versus one that sat for 4 months. I do know that it is imperative to build oil pressure pre-start on newly rebuilt engines, at lower rpm, or on engines where major internal components have been replaced. From what you said, however, that is not the case here.

If you contact Cummins, please pass along their comments and/or recommendations....thanks!
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Old 02-13-2012, 01:12 AM   #4
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a) pretty sure you'll never find the difference in longevity sweating it to this level
b) your remote starter type procedure sounds like it would fill the bill, but
c) you'll have to crank it for 30-40 seconds. but IIWMI'd
d) have a beer, & crank her up normally. There has to be an oil film left on bearing journals & surfaces from the last shutdown (not like those interstices go dry), and there won't be much pressure on anything at idle, as all the horsepower needed is to spin the engine internals and flywheel.

you may actually service your issue by not pre-priming. Pressure in the Injection Pump may have leaked down, and it may take some cranking to get that up to speed to allow proper injection pressure. However, I'd be more worried about premature wear on the IP (diesel fuel is its internal lubrication), and I'd kick the start key On (but not over to start) for 30 seconds, then Off & repeat twice; you'll probably hear the lift pump prime the IP each new key cycle, so now you'll start w/full IP internal pressure & limited wear there. Extreme high injection pressures can wear out an IP if it is starved for fuel (been there, dun that; $2,000).
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Old 02-13-2012, 04:36 AM   #5
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My 2 cents
Any damage on start up would be far out weighed by:
Time left between startups and running to full operating temp
Initial stand down condition of oil
Humidity and proximity to the ocean

So if you want to keep your coach in good nick whilst incubated
Change the oil
Keep a dehumidifier in the shower
Keep it under cover
Not in Florida
Find somewhere dry

Obviously all of the above can't be achieved but you can do what you can do
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Old 02-13-2012, 04:45 AM   #6
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To much stress. Check all the fluids. Fire it up let it warm up check for leaks and take it out for a short run, the go camping. Diesel engines are very durable, as are gas engines way to much time spent worrying about them.
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Old 02-13-2012, 09:38 AM   #7
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Quote:
Originally Posted by Yukon Jack View Post
I have a 2001 Monaco Dynasty with an ISC350 engine and am curious as to the best procedure to start up a 2001 Cummins ISC engine that has not been started since last fall.
Yukon Jack
Make certain the chassis battery is in good shape, then start it normally.
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Old 02-13-2012, 10:52 AM   #8
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"Cummins Engine Start-up After Extended Storage"


That is NOT an extended time period for a diesel engine. Diesels can start up normally after many years of sitting.

Ed
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Old 02-13-2012, 02:40 PM   #9
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Hi Yukon Jack,
Welcome to posting on iRV2. For me, I'd use the regular start-up procedure. If it is cold, plug in the engine heater the night before the engine is to be started. Millions of diesel RV engines sit for months with out being started. The time mentioned in the OP is nothing to worry about.
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Old 02-13-2012, 11:52 PM   #10
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If your engine has not lost its fuel prime to the injection pump, and the batteries are fully charged, the engine will start and run just as if it was last run yesterday. Definitely not a concern.
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Old 02-14-2012, 12:37 AM   #11
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Quote:
Originally Posted by bbeane View Post
Too much stress. Check all the fluids. Fire it up let it warm up, check for leaks and take it out for a short run, the go camping. Diesel engines are very durable, as are gas engines way to much time spent worrying about them.
You may not have a Cummins but Cummins specifically says not to sit and let it warm up. Start it up, be sure you have oil pressure and wait for the air to build up, then drive off. Don't floor it till it gets wamed up, but drive it. Diesels don't warm up unless there's a load on it.
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Old 02-14-2012, 05:29 AM   #12
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You may not have a Cummins but Cummins specifically says not to sit and let it warm up. Start it up, be sure you have oil pressure and wait for the air to build up, then drive off. Don't floor it till it gets wamed up, but drive it. Diesels don't warm up unless there's a load on it.
I ment to say let warm up for a few min (build air) and get a little oil moving My bad. Not to rob the thread but IMHO the idle time thing is over stated though, way to much stress over it. Everyone talks like Idleing will instanally kill your engine, ever been in a traffic jam, or rush hour traffic? I think the whole point of the no Idleing is the engine gets 0 MPG, makes a whole lot of noise, stink, and anoys everyone around. If the engine is over fueling and deluteing the oil or the oil pressure is to low when idleing, it's got bigger problems.
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Old 02-14-2012, 05:10 PM   #13
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I had trucks my whole life oil press. is very important but even if your stating new or just rebuilt engine. It's the same, start it, watch oil press. guage it will build up. If you don't have 30-40 pounds of pressure after 30-40 seconds shut down wait 30 seconds try again. If no press. then haveit checked.
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Old 02-14-2012, 05:24 PM   #14
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You don't mention where you are. If outside temps are still cool. I agree with GaryKD. Plug in block heater overnight and start it up. Our coach has both coolant block heater as well as oil pan heater. That will be your biggest help is having a warm block.

Jon
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