coolant

Does the concentrated coolant like Rotella ELC need to be diluted? I keep seeing people say 50/50 but the tech specs on the coolant says not to dilute with other coolant or water more than 15%. I’m changing a bad water pump, so I’m going ahead and flushing out the coolant system and...

Greetings, We are currently in the demo phase of a rear engine Thomas bus with a Cat C7 Engine. We have 4 heater fans with coolant tubes going to each of them, we want to remove them. However, we are worried that the tubes also lead to the window defrosters. Do we remove them, install new...

Can anyone tell me what this part is?

I have a 2000 International with a dt466e. When I was changing the oil I noticed a bit of water coming out of drain pan. No oil in coolant I cleaned and resealed the oil cooler, and changed coolant filter. Still water in oil. Took off oil pan and pressure tested coolant system. I made a...

I'm at the point where it'll be so much easier to remove my two front heater cores. They have just been such a headache and it'll save so much time, space, and stress to remove them and loop coolant line from thermostat straight back to the water pump. I have fomo on getting that "free" heat...

Hi all, it's a pleasure to make myself known on this site, I have been using it a lot to help me along with my bus I acquired a few months ago. I have a '97 international 3800 with the T444E. My girlfriend in I are on our maiden voyage from Florida to Minnesota to work the sugar beet...

Hey everyone, The owner before me said these were the heater hoses and he looped them in the front. I’ve seen some discussion about doing that and I’ve also heard people call them coolant lines. Are those the same thing? There’s no rear heater anymore (not sure if there ever was). 1991 Flat...

Hi everybody, I’m on my way to Oregon, and am in Northern California experiencing sudden cooling system issues with my 2001 international 3800 with a t444e. I noticed it running rougher than usual after I stopped for fuel a couple days ago, opened the hood, and saw large air bubbles bubbling...

As the title says my E-350 SMB is losing coolant at about 1qt/3hr driving with no visible leaks or puddles underneath. I'm thinking head gasket and hoping someone here can steer me away from that with some other possibilities. I'm on the Big Island in Hawaii, don't have a trusted mechanic and I...

Hi, I recently bought a used 2005 Gulfstream Independence and am doing some work on it and I noticed that the coolant for the engine was really low so I wanted to fill it but I am not sure what coolant to use for the engine. Any help would be appreciated it.

Hello all, Im in the process of flushing out my cooling system because my coolant sample that I tested was nowhere near perfect. So I just drained all the old coolant out of my 6V92T and am looking for a little guidance. From the research I’ve done the engine might need a few flushes with water...

I'm working on my install plan for my new 16KW diesel heater. I originally bought it for heat while parked as well as preheating the engine coolant for warm starts. I still haven't figured out my hot water heater. Originally, i was going to use a hybrid propane/120v water heater like the...

2001 international 3800 t444e coolant leak First post here—could use help identifying the source of this leak. First noticed it after a month of cold weather. It’s coming from near the oil filter, but I can’t tell where. Relatively slow leak, but new drops every day. No milky oil present, just...

Hey Gang- I hope y'all are doing well. I did a search for other coolant and heater removal threads and did get some info but it only brought up more questions. We were going to remove our rear heaters and I thought that the valve with separates the engine system from the rest was in the closed...

Hello everyone, I went to check my bus after a winter of sitting, and surprise surprise the batteries were dead. I was able to jump the batteries with an SUV and got the bus turned on. Everything was working until I started my next project, which was a coolant flush on the bus. I drained out...

OK, I'm in need of some help. We have gotten to the stage of our demo where we are removing the 3 rear heaters. I know I need to shut off the intake and return valves for the coolant but...I am new to this and not entirely sure how to identify where these are. I *believe* I have identified the...

I am removing my rear heater, partly just to get it out of the way during the prepping and the build (I intend to install a new one once I start my lay out. In the mean time I am completing the loop of my coolant lines and want to use black iron pipe nipples to join my existing lines and a u I...

I'm preparing to change all the fluids in my bus, so before I did, I thought I'd reach out and ask for input. The feedback doesn't have to be specifically about my setup, but if there's any particulars to consider, I'd appreciate knowing. I run a T444E (190K) with an Allison MT643. Here's...

I'm probably going to start some mud slinging here, but what the heck. I'm sourcing filters for my T444E engine and MT643 tranny. I've been searching for one brand that carries all the filters for the bus, but, no luck. In that search, I've also tried to determine which brands rate well. I'm...

I removed the front and back heaters. As far as I understand, it was helping with defrosting the front windshield and providing coolant for the engine in the back. 1-) Front: May I leave it without looping the pipes? If yes, what are the cons of it? 2-) Back: Does shutting the valve enough to...

Hello, I am going to cut out the rear heaters and use an elbow to loop the coolant hose back into itself. Do I have to use a specific material of the elbow (cooper, galvanized)? I am not sure if it can be corrosive over the long term. Thanks

Ok I have an 01 IH genesis FE. I noticed last time I drove the bus the bus main heater had a small drip from the heater radiator. I’m not even sure if the heater works to be honest. BUT, I just dabbed some sealant on it and it seemed to help but now it’s kinda pouring out. There seems to be a...

We are planning on heading out tomorrow and while checking my fluids I noticed that the coolant was getting very low. I had a shop do a coolant flush for me a couple months back and the info they gave me was that they used 'Alliance OAT ELC 50/50' , a red coolant, to fill it; however I cant...

We are planning on heading out tomorrow and while checking my fluids I noticed that the coolant was getting very low. I had a shop do a coolant flush for me a couple months back and the info they gave me was that they used 'Alliance OAT ELC 50/50' , a red coolant, to fill it; however I cant...

Hello everyone my name is Paul and my partner Meredith and I have a 1999 Chevy 3500 Thomas built short bus. We have started the conversion process and are currently prepping for bodywork. We have some rust issues because the vehicle was purchased from Ohio and the winters here suck LOL. As I...