for Jack

[Busnut83]

Hey Jack,,, this is Mike T,,,Busnut83,,, for the last 3 years I have been asking about what to do for my mc9 overheating,,, I see your reply about a trans cooler... Please help me  this may be all I need...

Dont take my grammer the wrong way,,, I am glad I saw your reply......

Thanks again

[JackConrad]

Mike,
   Here are a few photos of our cooler.  The cooler we installed almost fills the entire engine compartment passenger side door. It has a 300 CFM fan, (which we rarely turn on). Seems to get plenty of natural air flow without the fan. At the same time we installed the cooler, we replaced all the transmission cooler hoses. The fluid now leaves the transmission, goes through the new cooler, then goes to the OEM cooler on the side of the engine, then back to the transmission. Using the OEM cooler helps to heat the transmission fluid when starting out cold.  Jack

[Busnut83]

Jack,,, thanks so much!!!!!!  I will get started,,,, If you recall,,, my bus reaches 210* then shuts off,,, before I can pull off the road it will cool down and restart,,, I replaced the radiators,,, coolant,,, installed loovers,,, installed new injectors,,, ran a rack....

I love my mci-9


Can you recommend how and where to get started and the cooler???

Thanks very much

[JackConrad]

   I found our cooler and fan on Ebay. I had a local truck parts store make up the transmission cooler lines using hydraulic hose and crimp-on fittings.
   What type of driving are you doing when your bus shuts off? Hills, flatland, hot afternoons, etc. Since it cools down so fast, you might have something else going on.  Have you repalced the thermostats?  Jack

[TomC]

Jack- where did you have the louvers made?  Good Luck, TomC

[JackConrad]

Tom,
   I cut out most of the stainless steel door skin and added a piece of expanded aluminum mesh to the back side of the door skin before re-installing it on the door. After pricing a piece of stainless steel mesh, I bought an aluminum screen door protector and used the mesh from it.  Jack

[Busnut83]

Hey Jack how do or did you cut the stainless door ??

[JackConrad]

Drilled the 4 corners with a hole saw to get a nice raduis on the corners, then SLOWLY cut between the 4 holes with a cut-off wheel in my 4" grinder. Took my time and cooled the stainless with water to keep from discoloring or warping.  Jack

[JackConrad]

If you recall,,, my bus reaches 210* then shuts off,,, before I can pull off the road it will cool down and restart,,, I replaced the radiators,,, coolant,,, installed loovers,,, installed new injectors,,, ran a rack....

    Something else I thought of- make sure all the seals are in place around the radiators and blower compartment door. Make sure the deflectors are in good shape in the ends of the squirrel cage fans. 
     I am still puzzled why it will shut down from a hot engine and cool down that fast. If the engine is actually 210, it should take a while for that huge mass to cool down.  Jack

[Dallas]

I wonder if installing a second temperature gauge would help.

It sounds to me like there is a problem with the wiring or sending unit for the shutdown system.

I can't see the engine cooling down that fast from an overheat unless possibly there is air in the system and when it heats up, hits the sending unit with superheated steam. Then when the engine slows down, the buble is pushed along and the coolant reaches the sender again causing it to cool down quickly and allowing a restart.

Where are the sending units on your engine? Are the shut down sender and temp sender close to each other, and are they near the top of the engine or near the water pump?

Just thinking outload to myself, don't pay any attention to the above if you've already gone through this.

Dallas