Announcement Block
As of 12/1/2021, a major update of the forum software was accomplished
Update: 4/20/2024: The Eagles email account at GoDaddy no longer works. I have set up a gmail account as a workaround: eaglesinternational.email@gmail.com (This link seems to work for my outlook email, but may not work for other email platforms. If it does not load, copy and paste the link in your platform.)
Update: 4/27/2024: I am getting some SQL error pages as I click on different areas of our forum. Using the back arrow and hitting the link again usually loads the page. I will wait for a day or two before I have GoDaddy look into the problem.
Registration is open to the public (*) and free from any cost or obligation. Please allow up to 36 hours for your application to be processed. If you have problems registering, please email me at: eaglesinternational.email@gmail.com
(*) spambots will be deleted -- only legitimate public applications will be processed.
Reminder: the "quick links" menu offers you the best navigation of this forum -- you need to be registered and logged in to see that menu.
As of 12/1/2021, a major update of the forum software was accomplished
Update: 4/20/2024: The Eagles email account at GoDaddy no longer works. I have set up a gmail account as a workaround: eaglesinternational.email@gmail.com (This link seems to work for my outlook email, but may not work for other email platforms. If it does not load, copy and paste the link in your platform.)
Update: 4/27/2024: I am getting some SQL error pages as I click on different areas of our forum. Using the back arrow and hitting the link again usually loads the page. I will wait for a day or two before I have GoDaddy look into the problem.
Registration is open to the public (*) and free from any cost or obligation. Please allow up to 36 hours for your application to be processed. If you have problems registering, please email me at: eaglesinternational.email@gmail.com
(*) spambots will be deleted -- only legitimate public applications will be processed.
Reminder: the "quick links" menu offers you the best navigation of this forum -- you need to be registered and logged in to see that menu.
Engine Coolant flow
- ericbsc
- Moderator
- Posts: 743
- Joined: Wed Dec 24, 2008 8:31 pm
- FMCA #: 12345678
- Bus Model: 1973 Eagle 05
- Location: Boiling Springs, SC
Engine Coolant flow
Tried to hook up the front heat. I put the two lines fronm the heads in and returned into the block. I turned the three valves on I thought but have no flow. How many turns does it take?
Eric Brown
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
- Boomer
- Club Member
- Posts: 780
- Joined: Mon Nov 17, 2008 12:26 am
- FMCA #: F352905
- Bus Model: 1981 Eagle M10. Stretched, widened, raised to M15/45 specs. Cummins ISM 450, Allison World transmission. Mid entry door.
- Location: Southwest Washington
Re: Engine Coolant flow
Try cracking the bleed cocks on your heater core. Could have air in it. Have you removed the stock 12V water pump?
- ericbsc
- Moderator
- Posts: 743
- Joined: Wed Dec 24, 2008 8:31 pm
- FMCA #: 12345678
- Bus Model: 1973 Eagle 05
- Location: Boiling Springs, SC
Re: Engine Coolant flow
I replaced the entire system up front with a unit that has dash heat and air as well as defrost. I am driving an aux. pump off the engine for the air. I have the two lines coming out fron the heads connected together running to the front, and returning to the return valve on the drivers side of the engine. I do not have a pump other than the engine driven water pump. I do have a proheat system that I am installing with 12v pumps but it is not connected in this loop. I have turned those valves a bunch of times and I think they should be open. There seems to be no pressure on the new lines at all.
Eric Brown
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
- rusty
- Moderator
- Posts: 1547
- Joined: Thu Oct 09, 2008 3:22 pm
- FMCA #: F341087
- Bus Model: 1972 05 completed 2003
1994 15/45 in progress - Location: Johnstown Co.
Re: Engine Coolant flow
When I plumbed my dash heat I added a 12 volt pump in the rear bay. I think that is a long way to run the lines using just the engine pump. You should still have a little water that will make it to the front but it might not be enough to push an air bubble. Also in real cold conditions I don't think you will have enough volume to heat the drivers area.
Good luck Wayne
Good luck Wayne
- ericbsc
- Moderator
- Posts: 743
- Joined: Wed Dec 24, 2008 8:31 pm
- FMCA #: 12345678
- Bus Model: 1973 Eagle 05
- Location: Boiling Springs, SC
Re: Engine Coolant flow
I have a couple extra marsh pumps. Seems like the factory pump would push harder than that though.
Eric Brown
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
- ericbsc
- Moderator
- Posts: 743
- Joined: Wed Dec 24, 2008 8:31 pm
- FMCA #: 12345678
- Bus Model: 1973 Eagle 05
- Location: Boiling Springs, SC
Re: Engine Coolant flow
I put a 3.5 gpm Marsh pump clode to the engine. great flow to the front and back now. I haven't started the bus to see yet.When I took the front lines loose I had coolant in the lines but not a lot. Probably the lines in the new new unit cores are smaller also. They have restrictor valves in the lines that adjust the temp. I hope this does not cause a heat problem with the pump in back running when you turn the air temp up on the unit.
Eric Brown
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
Spartanburg, SC
1973 05
Series 60 allison 4000MHP
- rusty
- Moderator
- Posts: 1547
- Joined: Thu Oct 09, 2008 3:22 pm
- FMCA #: F341087
- Bus Model: 1972 05 completed 2003
1994 15/45 in progress - Location: Johnstown Co.
Re: Engine Coolant flow
I don't know anything about the marsh pump but if you are worried you can put a switch up front to turn it off when you don't need it. I have a switch up front next to the heater control. I turn it on and leave it on all the time I don't know what kind of pump I have but have had no trouble.
good Luck Wayne
good Luck Wayne