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mrpicky
Senior Member
123 Posts |
 Posted - 01/21/2017 : 9:00:07 PM
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| Been working on an 04 IC RE DT-530. Did an oil sample on it and it came back from the lab as having coolant in the oil. This particular bus has had cylinder liners and o-rings changed six years ago. Took the oil pan off and pressurized the coolant and saw no leaks. Also, checked for combustion gases in coolant (ok) and fuel injector contribution is all equal. I'm thinking maybe the oil cooler is the culprit. The kicker is that the boss is thinking of doing a top end rebuild on it. Now this bus has 165,000 miles on it and I'm thinking it can go a lot more before this happens. Nearby shop wants $15,000 to replace head, injectors, oil cooler, piston rings, o-rings, gaskets, etc. I think this to be a wasted expense and was wondering what some other bus mechanics would advise about this. Thanks in advance. |
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flint1
Senior Member
Canada
74 Posts |
Posted - 01/22/2017 : 08:21:46 AM
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| Is this the same unit you posted on in Dec that only had 5 of the liner seals replaced because the 6th was too hard to get at? |
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mrpicky
Senior Member
123 Posts |
Posted - 01/22/2017 : 09:48:14 AM
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| Yes it is. |
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flint1
Senior Member
Canada
74 Posts |
Posted - 01/22/2017 : 11:13:45 AM
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In my experience when an oil cooler fails oil mixes with the coolant as well as coolant in the oil. I don't own any dt's that old but I seem to recall some liner O rings from that era were defective and failed early
. If there is just a little coolant showing on an oil sample, but not enough to make the oil creamy, a long overnight pressure test is prolly the only way your you may even see a trace of a leak. |
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jeeptjken
Senior Member
147 Posts |
Posted - 01/23/2017 : 07:42:11 AM
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| 40 to 80 psi oil pressure usually will overcome 15 psi coolant pressure and put oil in the cooling system with a oil cooler failure at least in the last 2 I did that's what I found just my 2 cents worth try plugging in the block heater with the pan off and pressure test it with heat in the block |
How did you get the gosinta in the whatchamacallit |
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bedfordone
Active Member
USA
47 Posts |
Posted - 01/23/2017 : 07:55:39 AM
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| If you find out that you need to do a top end rebuild, I would consider a reman engine from Jasper, for about 10 - 12,000 you can pull out the engine a put in the reman with a warranty as opposed to the 15,000 you talked about with your local repair facility which probably has NO warranty. |
Brian Prochazka
Bedford City Schools
Transportation Specialist |
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mrpicky
Senior Member
123 Posts |
Posted - 01/24/2017 : 07:10:27 AM
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| Ok, thanks for all the advice this forum is fantastic! |
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Coolant in oil 04 IC
