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bwest
Administrator
United States
1828 Posts |
 Posted - 03/01/2013 : 8:42:52 PM
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As you all know I just love my IC buses. (not) Anyway, had the red circle with exclamation point in it come on and low coolant light. Coolant is between lines in resivor. Took to IC dealer because I thought it would be under warranty. Dealer gives it back to me saying coolant was low. I said no it wasn't they say yes it was. I said, well I see you next week. Anyway, drove the 25 miles back home and put it on the route. Driver gets 3/4 of the way done with pm route and the lights come on again. I told him to run it till it quits. Checked coolant, still ok.
Any ideas. I'm really getting tired of these highly technical buses, aren't you? |
Bryan |
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Thomasbus24
Administrator
USA
3175 Posts |
Posted - 03/04/2013 : 04:20:42 AM
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| Remember the good buses? Ya know, the ones with the all steel tank with no sight glass...carry a paint stir stick to check the coolant every day. Not good enough...must have idiot light! Must drive mechanic insane! |
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meanmechanic01
New Member
9 Posts |
Posted - 03/04/2013 : 6:58:04 PM
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| We've had the same problem when the light comes on and then we get out there to check the level and shes got plenty! The guys at the dealer said to plug and unplug the sensor to "reseat" the sensor... haha yeah... no dice... I do remember seeing their truck in our lot and splicing metal orifice tubes on the return hose to the top of the resivior, i guess to keep the coolant from foaming causing a false reading on the level sensor.. again only slightly helped. I went and just Air Vac'd all the ones with that problem to eliminate any and all air pockets just for laughs.. lol yeah its kinda a goofy problem :D |
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Bus Tech II
Active Member
40 Posts |
Posted - 03/05/2013 : 12:04:53 PM
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Try this!The following applies to I-6 EGR and 2007 MaxxForce® DT,9 and 10
If you are experiencing low coolant faults with a DT 466 EGR and MaxxForce® DT,9 and 10 engine and the coolant level is correct, perform the following steps:
NOTE:
DuraStar vehicles built with an I6 EGR or a 2007 MaxxForce® engine they are equipped with a black surge tank there should be a restricted fitting in the EGR return line. DuraStar vehicles with a 2007 MaxxForce® engines that are equipped with a Black surge and has a white dot on the top of the tank the EGR return line fitting in the tank is restricted. DuraStar vehicles with a 2007 MaxxForce® engines that are equipped with a clear surge tank the EGR return line fitting in the tank is restricted.
1.Verify that the coolant level is in the top of the upper sight glass or above the Max line on newer tanks, when the engine is warm.
2.If the level is below the top of the upper sight glass top off the surge tank to the proper level and see if the problem has been corrected, if not proceed to step 3.
3.If the coolant level is correct, the EGR deaeration line will have to be restricted by inserting a second 1/8 inch restriction into the line. Do not replace the surge tank. The fitting should be installed within 5 inches or 120 mm of the EGR cooler fitting. On MaxxForce® DT, 9 and 10 engines install a restrictor fitting in EGR deaeration line and the A/C bracket line a foot away from the surge tank.
4.Install the following parts as shown in Figure 1:
Method 1 Preferred :
(1) 3627939C1 3/8" restricted fitting
(2) 3523434C1 3/8" Hose Clamp
5.Cut the EGR return line to the deaeration tank within 5 inches or 120 mm of the EGR cooler fitting and insert the restriction assembly. Use hose clamps to secure the hose to the fitting barbs.
6.Verify that the coolant level is above the second sight glass and that the problem has been corrected.
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bwest
Administrator
United States
1828 Posts |
Posted - 03/05/2013 : 7:41:08 PM
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Thanks for all your work, Bus Tech II!! I ended up bringing this back to the shop and letting it sit over night. The next morning the coolant indeed was low (just at low mark). Found leaking booster pump, replaced it and this solved the problem.
I guess I am overly sensitive on these ICs. I'm going to have to get it out of my head that every time a light comes on the dash that it's the emissions system malfunctioning. Although this is the first time I have had anything else wrong with this bus besides the emissions. lol I must say this has been a pretty good bus as far as ICs go. I still don't like that the windows stay open on one side and the dash is about to fall off before it's 3 years old but hey, they can't all be Blue Birds.  |
Bryan |
Edited by - bwest on 03/05/2013 7:42:54 PM |
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sambrutay
Senior Member
United States
189 Posts |
Posted - 03/06/2013 : 06:37:00 AM
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| I would suggest you get rid of the boost pump. Junky leaking pieces of CRAP. If its a MAXXFORCE 7 the waterpump should flow enough not to need the boost pump says an IC engineer. |
Bruce |
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Fastback
Top Member
728 Posts |
Posted - 03/06/2013 : 07:46:23 AM
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quote:
Originally posted by sambrutay
I would suggest you get rid of the boost pump. Junky leaking pieces of CRAP. If its a MAXXFORCE 7 the waterpump should flow enough not to need the boost pump says an IC engineer.
Key word is "should" 
The good booster pump to use is 2226004C91, a bit spendy but long lasting and moves the coolant well. |
Why yes, the ORIGinal CHARGER is a Fastback |
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Mechan1c
Top Member
USA
624 Posts |
Posted - 03/06/2013 : 09:28:01 AM
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| I've removed the boost pumps in about 60 of these with DT/EGR, MFDT, and MF7's and all the engine water pumps are up to the task of moving the coolant. I put one of those sweet pumps you mentioned ^^^ on an RE last month and it's pretty nice. The RE needed the extra boost; my CE's seem to get along fine without... |
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bwest
Administrator
United States
1828 Posts |
Posted - 03/06/2013 : 2:01:50 PM
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| I have been told I should get them out of there. I have replace about 4 on one bus alone. Didn't use to have this trouble, been running these pumps for at least 16-17 years. China I guess. |
Bryan |
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meanmechanic01
New Member
9 Posts |
Posted - 03/06/2013 : 10:30:56 PM
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| The kysor pumps changed their design from the pump with the moveable bottom copper fitting to a solid molded plastic bottom half... Eh I had two new ones crack in half, turns out they have the same problem as the old ones: if you check the wiring, once and awhile the wires are filpped and it spun the pump backward! They tried to correct it with a revision sheet in the box say to flip the wires in the connector! Well at least they are trying to make it last longer than the 5 minutes that they actually work without leaking :D |
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Fastback
Top Member
728 Posts |
Posted - 03/07/2013 : 05:36:46 AM
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quote:
Originally posted by Mechan1c
I've removed the boost pumps in about 60 of these with DT/EGR, MFDT, and MF7's and all the engine water pumps are up to the task of moving the coolant. I put one of those sweet pumps you mentioned ^^^ on an RE last month and it's pretty nice. The RE needed the extra boost; my CE's seem to get along fine without...
I have tried our V8 CEs with and without the booster pumps. Our heating circuits are plumbed series/parallel, in theory, half the coolant would flow to the right front heater and the other half to the heaters on the left hand side of the bus. Our booster pumps are on the Drivers side loop to promote coolant flow to drivers, defroster and underseat heaters. I feel we do better with the booster pumps and since our buses are nearly all parked outside we look for any advantage we might get.
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Why yes, the ORIGinal CHARGER is a Fastback |
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joeheb
Senior Member
134 Posts |
Posted - 03/07/2013 : 05:45:59 AM
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| These newer booster pumps don't last one year. I have 6 1987 GMC buses with the original steel booster pump still working with no leakes, these new plastic booster pumps are total junk. |
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Fastback
Top Member
728 Posts |
Posted - 03/07/2013 : 08:13:02 AM
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| I would add that back in the days of the AT545 transmissions, we did'nt feel we needed booster pumps in the heating system. |
Why yes, the ORIGinal CHARGER is a Fastback |
Edited by - Fastback on 03/07/2013 08:13:34 AM |
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IC CE 200 low coolant light, engine shut down
