A long afternoon

[Robert Johannesen]

Leroy, I would like to know also! Thanks for your response.

Where is the alarmstat for the fan normally located? I will check and see what its setting is. My goal was to have all the engine temps run lower. My oil temp is now about 230 constantly.

I will go back an read my maintenance log to refresh my memory, because it has been about 10 years since I tried the change. I remember being very disappointed. I know I didn't change my alarmstat for the fan because I didn't realize I had one. It is probably in the hydraulic circuit between the pump and the valve that opens the flow and maybe I can read the setting on the device itself.

I will go back and research the system (I think I have the applicable BB prints)again because I do want it to run cooler (Oil temp and water temp) if possible. I am also not opposed to designing an in line oil cooler.Having it closer to the water temp is OK with me. My heat exchanger for the Oil and water is so close to the frame on the left side of the block that it cannot be removed to inspect or examine it.
I may set up and try my alarmstat the way you did sinceyou seem like it that way and your temps are very reasonable.

Will let ya'll know. Going back to VaBch next month so I may get it done and check it before then.

Thanks, Bob J.

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From: Leroy
To: WanderlodgeForum@yahoogroups.com
Sent: Fri, March 5, 2010 4:34:57 PM
Subject: [WanderlodgeForum] Re: A long afternoon

I am interested in this engine thermostat phenomenom. I messed with my cooling system for months and found a combination that works well for me.
The engine thermostats do not control the fan cycles on my coach. I don't believe they do on yours. Could be wrong. An separate system incorporating an Alarmstat does that. Stock Alarmstats were 195 degrees with an approximate 8-10 degree spread. The fan cycled to high at 203-205 and back to about 193 at fan idle. I run a 190 degree Alarmstat with 180 degree thermostats. I can see the movement on the gauge and the VMSpc. My spread is between 188 and 195 depending on OAT. If I run my fan on override it holds at 180 in winter and 190 in summer.
I sure would like to know how your fan is configured and why it would be cycling after you changed thermostats. If it ran 170 all the time it should never cycle but remain in idle or about 500rpm.

--- In "WanderlodgeForum%40yahoogroups.com", Robert Johannesen wrote:
>
> I dropped my thermoststsÂto 170s for about 6 months and the fan kept cycling on and off so often I went back to stock after talking to Detroit. I probably still have them if you want to try them on your rig.
>
> Â
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> ____________ _________ _________ __
> From: ronmarabito2002
> To: "WanderlodgeForum%40yahoogroups.com"
> Sent: Sun, February 28, 2010 1:58:50 PM
> Subject: [WanderlodgeForum] Re: A long afternoon
>
> Â
> Mike: Why do you want to change thermostats to 170's? Good heat without overheat makes the
engine run better and more efficiently. I think 180's is cool enough.
>
> R.E. (Ron) Marabito, Dallas, TX 92WB40
>
> --- In WanderlodgeForum@ yahoogroups. com, "mbulriss" <mbulriss@ .> wrote:
> >
> > I spent all afternoon (into the early evening) opening up the bed and then the innards to be able to replace alternator #1 - one more time. In mine, I also have to work around all the plumbing, which was conveniently installed in the way of the engine hatch! After opening the floor, you can't even see the alt!!! I have to stand on the tranny and kind of remove the alt by feel. I bought a new one and replaced it. Not going to screw around rebuilding the old one again - 7000 miles since the last time has soured me on rebuilds. Besides, the new one was the same price as the last rebuild. This is really not a fun job.
> >
> > After I finished installing the alt, I then installed a replacement
turbo intake tube that I found in a 'reclamation center' (aka: truck junk yard) to replace the one that broke in South Padre. The weld job did not hold up. If you want a good laugh, I called Detroit to see about getting a new one, because I really wanted a new one. When I heard $500 for a piece of exhaust pipe, I decided to try to find a used one. If anyone knows of a place to get part number 5101394 (yup, it's stamped right on it) for way less than $500, let me know please. And I used to think Harley parts were high dollar!
> >
> > Man, I am beat up and sore all over! I left the floor open as I want to remove the 'infamous' coolant hoses to the air pump tomorrow. At least that's the current plan. I realllllly am not looking forward to that job! I think I will replace them with braided stainless steel hoses so I never have to do it again!
> >
> > While I was having fun, the wife pulled each screen window and washed
them, did the Invisible Glass cleaning on each window, and then scrubbed each window track and silicon lubed them. They slide open really nice now.
> >
> > It seems my to-do list just keeps growing without getting shorter! Is it just me? I want to change the thermostats to 170s. I need to rebuild the Gast air pump. I have service the air dryer on the list. I plan to pull the electric heaters to clean them out. And on and on..... And I haven't even started on the wife's list of modifications yet! I keep wondering: Are we having fun yet?
> >
> > Long day..... having fun.
> >
> >
> > Mike Bulriss
> > 1991 WB40 "Texas Minivan"
> > San Antonio, TX
> >
>