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Cat D5 oil usage

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Don

06-13-2001 07:35:01




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We just got a D5 that has a rebuilt Cat 3306 engine in it with about 75-80 hours on it now. It uses about a gallon of oil a day (8 hours). It isn't leaking anywhere. The old hand on our site says this is about normal as they will use some oil. Is this correct? I have several pieces of equipment with diesel engines and they don't use any oil to speak of. Thanks




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azjbird

06-15-2001 03:12:06




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 Re: Cat D5 oil usage in reply to Don, 06-13-2001 07:35:01  
Don, I`m A transport driver for one of the western CAT dealers. We had A new 140-G that was doing the same thing for A good customer. The shop finally figured out that the honeing on the cyl. was too aggresive, and the rings would not seat. After 2 cyl kits. I like the cardboard idea too, but dont break the head! $$$$$! J.



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Shaun Haley

06-13-2001 19:24:28




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 Re: Cat D5 oil usage in reply to Don, 06-13-2001 07:35:01  
Dear Don, I own a D5 CAT 94J series with the 3306 engine and it won't use a drop of oil in a days time!If you have no leaks the oil is probably going by piston rings that have not seated.We had this problem with aftermarket rings in a 3306 irrigation motor just three months ago.We rebuilt the engine and it used more oil after the rebuild than it did before.We are talking 5 gallons in one 10 hour run.We finally fixed the problem without tearing it back down.We took a piece of cardboard and put it in front of the radiator,ran the engine at between 210 and 220 degrees for approx one hour and then let it cool completely off.It has not used a drop since!This is a shadetree method ,but it worked for us. I would try it on yours because you have nothing to loose. A word of caution, don't let it get over about 225 degrees.The engine needs to get good and hot but just don't crack anything!

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Don

06-14-2001 07:05:47




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 Re: Re: Cat D5 oil usage in reply to Shaun Haley, 06-13-2001 19:24:28  
Shaun, I was wondering if the rings were seated but I would think they would be getting better by now. I noticed that while there appears to be no smoke in the exhaust that a considerable amount of smoke comes out of the crankcase. I notice this when topping off the crankcase oil. The engine starts good, runs good and has plenty of power but this oil usage has me worried. Sounds like the cardboard in the radiator trick might be worth a try, I don't guess it could hurt anything unless I were to over do it. I have noticed that the engine runs real cool, the gauge never even gets anywhere close to the hot zone. Anybody else have any ideas what the problem/solution may be?

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D Neubert

06-13-2001 16:06:12




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 Re: Cat D5 oil usage in reply to Don, 06-13-2001 07:35:01  
That sounds like a lot of oil to me. Is this a power shift or manual clutch? You can lose oil thru the rear seal and it will mix with the trans oil in a power shift or a wet clutch.But then you should notice the oil rising in those compartments unless they are leaking. Dave



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greg

06-16-2001 14:43:48




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 Re: Re: Cat D5 oil usage in reply to D Neubert, 06-13-2001 16:06:12  
I agree with shaun. I have seen more than one engine (gas or diesel) use much oil after o/h due to ring seal failure. Your crankcase breather is a dead giveaway to this problem. Many engines with an overactive cooling system will end up with ring seal problems. Seems you can't build enough cyl pressure AND cyl temp to get the rings to conform to the sleeve. Have done the same cardboard trick with success, BUT DO NOT LEAVE ENGINE UNATTENDED WHEN TRYING THIS. It has worked for me.

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Don

06-16-2001 18:38:50




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 Re: Re: Re: Cat D5 oil usage in reply to greg, 06-16-2001 14:43:48  
I going to try the cardboard trick, I looked at it today and it's not a simple thing to get to the back side of the radiator. There is a screen as well as the fan and etc to deal with. You can't just reach in there with a piece of cardboard. Is there a simple way to get to this area that I am missing?



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Shaun

06-16-2001 19:01:51




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 Re: Re: Re: Re: Cat D5 oil usage in reply to Don, 06-16-2001 18:38:50  
Don, I didn't even think about the fan pushing instead of pulling on the dozer. If I were you I would try it from the blade side of the radiator anyway.Even though the fan will be pushing air into the cardboard through the radiator it still should get much hotter than normal.Just completely cover the radiator core and then brace the cardboard so that it won't be blown out. Let me know how it works!
P.S. It is next to impossible to get at the engine side of the radiator.I just put a water pump on mine and it was a BEAR!

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