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central Iowa | I own a CIH 9180 with a Cummins 855. It seems to be cold blooded, it spits and sputters when started especially when it's cold. I've replace injectors and had the pump checked out. After it warms up it runs well. Is this just the nature of this engine or is there something else I could check? |
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just a tish NE of central ND | It is its nature to a large extent. |
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Sunburst Montana | Of the few 855s we did own, they all did that. The Cats never did.
Edited by Steiger Man 10/18/2012 19:41
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Hastings, Florida | Those engines have many different settings [ called CPL's ] . They have varying timing specs, pump pressures, etc. Some are not cold friendly, some are. Most I have owned ran fine when started cold, some did not. If it has a 120 volt plug in heater, use it. That helps. Other wise, just let it warm up before using. |
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| The 855 uses a low pressure fuel injection system 2,200 psi to the injectors, also known as a " dirty diesel engine " The N 14 with the ECM computer has fuel pressure in the 5,000 psi range. Higher pressures make for cleaner burning. People complain about the EPA, but they forced a better/ cleaner running engine with tier 1. Tier 2 was when they went to EGR. And we have all discussed the tier 3, and 4 that we have now.
Edited by isustud 10/18/2012 19:48
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central mich | You can expect that type of activity on a cold start. If you have the VS pump and you have some fuel leakage on the fuel shaft they will tend to lope a little and then clear when under load. PT system does not like air any better than any other system. |
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| Define COLD. If cold is 50 degrees may be some thing not quite right. If cold is 30 degrees you are lucky it started! |
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| I have had Versatiles that were cold blooded, have a 9170 grain cart tractor that is cold blooded. But have a 855 in a IHC Semi that will start at 20 degrees without ethor or being plugged in........go figure |
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Leeds, North Dakota | Royle, pump checked out? by Cummins? when injectors were installed assuming they were set properly along with valves, only other issue would be low compression, 855's start good about to 20 above in good shape, Scott. |
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| the old 855's cannot change injection timming , once it is set it is set, no timming advance notta......... |
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Hagen Brothers farms,Goodrich ND | duncan - 10/19/2012 18:35
I own a CIH 9180 with a Cummins 855. It seems to be cold blooded, it spits and sputters when started especially when it's cold. I've replace injectors and had the pump checked out. After it warms up it runs well. Is this just the nature of this engine or is there something else I could check?
It always has been the nature of the beast on our 84 model Steiger Panther KM 325. The 855 snorts and puffs on a cold start, worse if you try to open the throttle a little with a dead cold engine. The one year newer 85 Couger with a Cummins L10, smooths out immediatly on a cold start. |
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| We have a JD 8970 with an 855 engine on the place, the family has owned it since it was new. The 855 is cold blooded, anything below 45 degrees you need an ether can handy. |
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central alberta | We are plugging in our case9270 and versatile835 these past few days, and they pop right off, without plugging them in I am pretty sure they wouldn't start. They are an awesome engine though, they just go and go....if you have a plug in, use it. |
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central Iowa | Injectors were replaced by a local mechanic who is very familiar with the Cummins engine. Don't know if he checked compression. The pump was taken to a diesel service center in Fort Dodge. I'd thought the pump would be turned way up but it was pretty much to standard specs. Just sounding like it's the nature of the engine. |
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Wallis, TX | The timing is, in effect, set by the shimming of the follower boxes. By moving them in or out you set the high point on the cam in a different spot in relation to the crank, setting the timing point. |
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ECMN | twraska - 10/18/2012 21:26
The timing is, in effect, set by the shimming of the follower boxes. By moving them in or out you set the high point on the cam in a different spot in relation to the crank, setting the timing point.
and also in response to 7720gas
"the old 855's cannot change injection timing , once it is set it is set, no timing advance notta........." correct for pre N14 engines
The higher injection pressures of newer engines and the ability to vary the injection timing is what helps them to start and run better, cleaner when cold.
Here is a quote from an article someone posted on here once.
"MECHANICAL VARIABLE TIMING :-------- The advantages to this timing system are many but the first and most important benefit is decrease white smoke when the engine is idling or cold."
I'm posting a link to this article. I would not take all this to heart as the "must do" to all Big Cam 855's, because better ways to get the HP from an engine now exist. The article does have a lot of good info on the inside workings of the Cummins 855
http://www.pittsburghpower.com/support/viewtopic.php?f=7&t=110&sid=...
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| farmechspector - 10/18/2012 23:12 twraska - 10/18/2012 21:26 The timing is, in effect, set by the shimming of the follower boxes. By moving them in or out you set the high point on the cam in a different spot in relation to the crank, setting the timing point. and also in response to 7720gas "the old 855's cannot change injection timing , once it is set it is set, no timing advance notta........." correct for pre N14 engines The higher injection pressures of newer engines and the ability to vary the injection timing is what helps them to start and run better, cleaner when cold. Here is a quote from an article someone posted on here once. "MECHANICAL VARIABLE TIMING :-------- The advantages to this timing system are many but the first and most important benefit is decrease white smoke when the engine is idling or cold." I'm posting a link to this article. I would not take all this to heart as the "must do" to all Big Cam 855's, because better ways to get the HP from an engine now exist. The article does have a lot of good info on the inside workings of the Cummins 855 http://www.pittsburghpower.com/support/viewtopic.php?f=7&t=110&...
well, you can take the cam followers off of a 475 twin turbo version, these have the ability to rotate from the cam thereby they will change the timming, I have a set laying in my hot rod pile ............ |
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| Funny nobody mentioned it... but make sure it hasn't developed a fuel leak... anywhere in the system. It could have a slight leak up top or on a line anywhere that's allowing a bit of fuel to drain back down... then you get an engine that cranks a long time to start and sputters and staggers when it does, trying to clear the air.
This is no different on the old 855's than it is on the N14... or the L10 for that matter. They all work on the same basic principle.
Rod |
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855 Cummins
