Community Forums

mytime · 07-15-2014, 05:59 AM

Traveling sunday my isl 400 ran hot, had to add water, I could see the coolant dripping but could not tell where it was coming from, long story, li was awful hot outside too, after a couple of fillups we reached our destination.
Found the leak yesterday, the 3/8" rubber tubes running from the surge tank tank acrpdd the top of the engine, were clenched down to the A/C compressor so tight it had worn a hole in one of the lines.
Good part. I repaired it myself, bad part lots of coolant to purchase. Happy travels

Jim Estes · 07-15-2014, 06:20 AM

Good find and troubleshooting! You might want to add some chafing gear or fire sleeve to the new hose when you replace...not sure of your configuration though...

smlranger · 07-15-2014, 07:45 AM

Sorry you had the issue but glad you got it fixed. When we first got this coach, my poking around in the engine bay revealed some small cracks in those hoses and some evidence of high pressure leaks at the connections. So, I replaced all of them with the blue silicone hoses. The hardest part of the job was finding the special clamps you need to use with that type of hose.

Smitty77 · 07-15-2014, 11:19 PM

Glad you caught it and fixed it before it cause a bigger problem.

I have an annual ritual where get my grub clothes on, and crawl under the coach with my strong flashlight. I just look everything over real good. Follow hoses, metal piping, electrical. Check bushings, bolts, rivets, etc... And note, I do this from below with a crawler, but also check the front generator and rear engine compartment too.

I've made a few finds doing this, and added extra padding or chafing protection.

Finally, as I don't bend like I used to - I also pay an hour of shop rate at the RV Service place I go, for a second set of eyes to look over the tighter areas I can't get into. Par of my yearly major service.

I appreciate your post, and will do a double inspection on those hoses.

Best,
Smitty

smlranger · 07-16-2014, 06:08 PM

Quote:

Originally Posted by Smitty77

Glad you caught it and fixed it before it cause a bigger problem.

I have an annual ritual where get my grub clothes on, and crawl under the coach with my strong flashlight. I just look everything over real good. Follow hoses, metal piping, electrical. Check bushings, bolts, rivets, etc... And note, I do this from below with a crawler, but also check the front generator and rear engine compartment too.

I've made a few finds doing this, and added extra padding or chafing protection.

Finally, as I don't bend like I used to - I also pay an hour of shop rate at the RV Service place I go, for a second set of eyes to look over the tighter areas I can't get into. Par of my yearly major service.

I appreciate your post, and will do a double inspection on those hoses.

Best,
Smitty

I also don't get into places I used to when I was younger and more flexible so ask the guys at my local Cummins Coach care to poke around real good when they do my annual service.

My father owned a radiator shop for about 40 years and I worked for him on weekends and during summers. I got real good at sniffing out potential coolant leaks.....I can smell it before it starts leaking