Waterwetter for diesel coolant [Chasing MCI engine heat]

epretot · October 27, 2024, 10:05:39 AM

Right Side

epretot · October 27, 2024, 10:07:01 AM

Left Side

epretot · October 27, 2024, 10:09:37 AM

Both sides

plyonsMC9 · October 28, 2024, 01:52:35 PM

Quote from: oltrunt on October 27, 2024, 07:36:08 AM
My MCI9 came to me with new radiators and a new water pump but still had an over heating problem. It turned out to be a loose impeller on the new pump and once tightened properly the over heating problem was history. Jack

Thank you Jack! I appreciate that suggestion.
I had a new water pump put in just in case, however the heat problem remained.

Kind regards, Phil

plyonsMC9 · October 28, 2024, 04:18:23 PM

Thanks very much Eric,

That is hugely helpful. It looks like I have problems w/ my airflow. And I see you have the (30 inch? ) 9 blade radiator fan.

This looks like there are a couple of good opportunities here for me. I have a 30 inch diameter 7 blade fan, and the blades look pretty weak next to the intercooler fan. I called MCI and the word there is that I could use the 9 blade fan.

And - I see your panels in back of the radiators go ALL the way to the bottom. Mine have a one inch air gap at the bottom of each panel, meaning that, I believe, the air flow is not isolated between the intercooler and radiator. Also, I have areas at the top of the panels also that would enable air flow between intercooler and radiator fresh air intakes.

The MCI tech recommended these be sealed. Possibly not a specific seal for this purpose available, so something may need to be fabricated.

Finally, I do need to check on the one speed fan clutch to be sure it is not getting old / slipping..

What an adventure..

Kind Regards, Phil

luvrbus · October 29, 2024, 03:32:52 AM

Phil this outfit www.kit-masters.com will help you more than MCI with the fan and clutch problems ,they will help you ID the fan clutch and how it works and build you a fan

epretot · October 29, 2024, 05:41:09 AM

Glad to help.

Since I am still learning....

I understand these are both radiators, but what does the intercool cool specifically.

Transmission, turbo?

luvrbus · October 29, 2024, 07:34:26 AM

Quote from: epretot on October 29, 2024, 05:41:09 AM
Glad to help.

Since I am still learning....

I understand these are both radiators, but what does the intercool cool specifically.

Transmission, turbo?

They are not both radiator's, the Charge air cooler (inter cooler ) cools the air entering the engine, diesels like cooler air under a 129F at intake to produce more power from the cooler dense air ,the only purpose it serves is for cooler air, A series 60 will flash a code if the air intake is above 140F,the Carge Air Cooler does require attention they are bad about cracking resulting in low turbo boost that will add heat to your series 60 engine or any modern diesel engine

plyonsMC9 · October 30, 2024, 11:05:42 PM

Quote from: luvrbus on October 29, 2024, 03:32:52 AM
Phil this outfit www.kit-masters.com will help you more than MCI with the fan and clutch problems ,they will help you ID the fan clutch and how it works and build you a fan

Thanks very much Cliff, I'll be giving them a call soon.

Best Regards, Phil

plyonsMC9 · December 25, 2024, 08:00:20 PM

The latest on ' chasing MCI engine heat.

MCI tech support recommended I try

Action Bus and Truck Repair, in Phoenix, AZ

I did, they were very hard working and fixed the seals around my air flow panels behind the radiator and Charge Air Cooler. Also, they replaced the radiator fan clutch. The clutch was 30 years old, so possibly slipping. I can't really test it now as the bus won't run hot enough going up the I-17 in this cooler weather.

I'll continue to update this thread as things change. Also, they recommended against swapping out my 7 blade fan for a 9 blade, even though it would fit. Wanted to make sure the issues aren't resolved by getting every piece exactly right. I can't argue with that.

Take care all, and Merry Christmas!,
Phil

plyonsMC9 · February 11, 2025, 10:30:45 AM

A couple more updates;

Did a good amount of driving around southern AZ in the past month while pulling the Jeep. In the past (before the radiator fan clutch was replaced and air intake to the radiator seals were added) this would result in temperature "creep". Usually sometime after 45 minutes. Even in cool weather.

The temperature never got above 190. Usually it would hit 185 and then back off. My temp gauge is hard to read as there are large gaps between any numbers. Either way, this is a first for me in the time we've owned this bus; no temperature creep.

Upcoming cross country driving closer to the summer months will provide the final word, and whether I add fluted engine bay doors to further cut down on any heat buildup. I do use the EHP heat blankets around turbo area and exhaust piping.

Take care all, Phil