draining coolant 5A
 

draining coolant 5A

Started by codretaw1, April 04, 2013, 03:08:43 PM

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codretaw1

hi guys any tricks on drainig coolant from 8v71 replacing hoses and thermostats also flushing rads

bevans6

My 5C has a drain plug on the lowest coolant tube leading towards the water pump.

Brian
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

lostagain

Mine doesn't have a convenient plug. I remove a hose that is low and let it drain in a pan.

JC
JC
Blackie AB
1977 MC5C, 6V92/HT740 (sold)
2007 Country Coach Magna, Cummins ISX (sold)

Ed Hackenbruch

When you refill, if you do it slowly and give the water time to settle down thru all of the lines, you can avoid having an air lock somewhere.  :)
Used to own a 1968 MCI 5A and a 1977 5C.

luvrbus

Most should all have a drain plug at the bottom of the oil cooler on a 71 or 92 series or on the connection to it
Life is short drink the good wine first

codretaw1

thanks guys found drain at lower rad tube , all done new thermo stats and all new hoses

bevans6

Make sure you open the tap on the cross-over tube between the two thermostat housings to let the air out.  You will probably find it takes a while for the coolant level to settle down as the air works it's way out of the engine.  You may have to bleed the driver's heater at the front of the bus if you got air in that system.

Brian
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia