Toddgoodwin

UPDATE:. First, thank you for the responses!  I opened the hatch and was starting to check out the light coming through the radiator when I noticed about a 4"x4" area in the lower right corner covered in little papers and general filth.  Other side I pulled out a Dorito bag.  Can't believe it!  Also the radiator was grimy.  I got all the paper, leaves and trash out, thoroughly soaked it in Simple Green and left for 20 minutes.  Rinsed it thoroughly and a ton of grime hit the ground.  Started her up afterwards and it blew bubbles for a few minutes. 

One question: Is it normal to have a space in the middle that has a little less air flow at idle?  I figured there probably is a little less because of no fan blades in the center.  

I bought mine from Headlight Revolution.   They were very knowledgeable and the headlights have been great.

7 minutes ago, RVSSNAKE said:

On a bright sunny day go inside and lift the engine cover and see if you can see daylight through the radiator.

my guess is you really need to clean it.

I do ours every year and we only put about 4000mi a year on ours.

I use simple green pro HD, It’s purple.

bought a gallon and got a spray bottle full with it.

used about a spray bottle and a half and now can see everything through it.

I use a power washer but you need to be careful and not get too close.

you can damage things.

Thank you!  I'll let you know how it goes

8 minutes ago, Gary 05 AMB DST said:

Todd, my temperature will go over 200 then the fan kicks in and it goes down to 180. I have the Cummins add-on thermostatic fan clutch that was installed in 06, 07. Could you have that?

Gary 05 AMB DST

I haven't put one on but it may have been by the last guy.  Also it would not come back down many times without me stopping.

10 minutes ago, millionroy said:

Recently discovered my overheating 2001 HR 330 ISC had a large hole on the medial (inside) side of the muffler.  Downshifting only made it worse because of course the exhaust was directed directly toward the fan where it was immediately blown into the shroud through the radiator.  Replaced the muffler, drove it up a 3-4 mile incline and never hit 200F.  If not that, the next thing would be cleaning the radiator.  I use Extreme Simple Green. Good luck.

I will check the muffler.  Very interesting because my mechanic and I were just talking about how we are coming up to having to change the muffler.

Had the radiator flushed and new coolant put in. Are you saying cleaning the fins?  I have not.  It has had its radiator replaced by the guy I bought it from but it's been a few years and it does look dirty.  What do you clean that with?

So we headed from Ohio to the FMCA rally in Gillette Wyoming pulling our Chevy Colorado with our 2005 HR Ambassador with the ISO 330 loaded pretty heavy.  Got out to South Dakota and the temps were running in the upper 90s and I started seeing temps over 200 pretty often.  Was running a little slower anyway but the coach seems to run hot.  When I stop for a break cools right back to 180.  Disconnected the truck and let my son drive the final leg in Wyoming and it seemed to still run hot.  Coolant is new and full.  Fan running good and when I stand behind the coach at an idle the air flow seems good.  Am I just trying to do too much on too hot a day?  Thoughts?

We had the same issues and after I had a talk with the guys at JC Refrigeration, ended up having them  put in the gas/electric replacement (mainly because of how we like to use the coach).  It has worked AWESOME.  Runs on #5 at about 38 in the refrigerator and the freezer keeps the ice cream solid.  Pretty simple: Double the coils and they are also thicker tubing.  Also had everything else including cooling fans replaced.  Only electronics and box are original.  All in about $1600 and 3 hours at their place in IN.