heater hose to aqua hot rupture

[HHIDan]

Originally Posted by kraig

Marvin- One question, do you have the 400 Cummins?

On the extra hose, I replaced it to down inside the frame and put in a shut off and connected to old hose. I may shut it off and see what happens. Once it goes into frame foam insulation on rear bulk head, cant see where it goes.

My hoses went from engine to AquaHot (1 in and 1 out) and from engine to front cab heater (1 in + 1 out). The two return lines (out) were connected together over the tag axle thru a Y connector. I only had to replace the two hoses to the Aqua Hot and yes they did go thru the frame just up in front of the tag axle. They do go thru there between the water tanks to eventually reach the AquaHot which is just in front of the tanks (next compartment). If you rip the spray foam you will hopefully be able to pull the new hose with the new. I was not so lucky, I had to enlarge the hole and I left the old hoses in there as they were tied with ti-wraps. I had to fish the new lines tru. I then re sprayed the hole and put a bunch of acoustic sealer on top of that dressing. Lots of dirty work...
I put my two shut offs at the engine. Note that I dug myself a 3 foot wide by 3 foot deep trench in my yard to use as a pit, made the job a ton easier and safer.

[RogerBall]

I'm thinking about adding shutoff valves on the five hose connections on my engine block (like others have). Seems like a good preemptive move with all the heater hoses we have running for and aft. I'd prefer to place the valves on the block itself however, instead of inline.

My question is does anyone know if the engine block nipple fittings are removable or are they a permanent press fit? If removable, what size thread?

I haven't lost any coolant yet but I can hear the clock ticking as I drive down the road!

Thanks for your help.

[kraig]

You could call Cummins with your serial number and they should be able to tell you. If it were mine, I would be little nervous as the nipples could be rusted in. The ones on the front of the engine you probably couldn't screw in valves as there is not enough clearance. if you don't want to change out the whole hoses, I would just buy heavy duty truck and bus hose and run from the a foot or two and put your shut off valves on. Also you should label the valves. This spring I had coolant leak on my hydro hot. Since I wasn't sure where it was coming from, I shut off all my valves and was able to drive it home.

[Terry W]

Hey guys,

I have my alternator out at the moment and I'm thinking I should at least replace the hoses that are located behind the alt. Not that it's a job that I had in mind at the moment, I'm trying to get a couple of other issues taken care of. I am wondering if all of the hose, Hyro Hot and cab heat, are 5/8' inch. Removing the alt wasn't a huge deal, but it's the old two birds scenario. I will replace with Gates Green Stripe.

Thanks, Terry