[Jack Houpe]

On our last trip home from Florida I parked the bus and started opening up or home from being gone for almost 5 months and came out the next morning and seen a spot on the concrete about 1 foot in diameter stuck my finger in it and found out it was coolant so crawled under and took a look and it was dripping from a weep hole on the bottom of the pump. This is on a series 60 engine so it will apply to a great deal of coaches here. I believe this to be the original pump so its 30 years old and has 210k miles on it. The pump replacement is pretty straightforward has 3 bolts that hold it to the back of the cam cover, only an O ring for sealing so no gasket. The old pump and new pump have different part numbers but they are the same except one of the ports on the bottom of the new pump is 3/8 inch rather than 1/4 inch so if your going to use that port you'll have to change fitting or buy a reducer bushing. Pump was $275 and shipping from AZ so thats not bad but I decided to change all the hose connections and what paint all the coolant pipes while I was at it. The new coolant pipes was not cheap and they vary in size all the way up to 3.125 ID. I bought 3 foot sticks of 3.125 2.625, 2.75, 1.625 to the tune of $400 bucks and there is a silicone hose kit for the water pump to the tune of $69. Coolant filter $15.

First step is to drain the coolant, I used a plastic tote to catch the fluid then a electric fountain pump to send to a 55 gallon plastic drum, total amount of coolant was roughly 15 gallons. Before I put it back in a used a antifreeze test kit to check for acid level and coolant consistency which Gordon said was a must do.  The hardest part of the whole job is replacing hoses, again I lost a pint of blood and looked like I'd been in a fight with lion. Painted all the lines and new water pump.



https://www.ebay.com/itm/256770498259?
mkevt=1&mkpid=0&emsid=e11400.m144671.l197929&mkcid=7&ch=osgood&euid=c64fad7741c2422cb3caccfd47acdc2d&bu=43196671996&exe=0&ext=0&osub=-1%7E1&crd=20260427065755&segname=11400

https://www.amazon.com/dp/B0C34FMMS5?ref...asin_title

https://www.amazon.com/dp/B0753MZT7P?ref...asin_title

https://www.ebay.com/itm/156795590842

[Jack Houpe]

I use the wrong test strips, I will retest with the proper strips

[Jack Houpe]

This is the correct coolant test strips

[markkitch]

Great update! how long did it take you?

[Jack Houpe]

Water pump would have been a full day, changing all the other hoses another day I'm not a spring chicken anymore.