Get information on Eagle, GMC, Prevost, MCI and other bus conversionsRV and bus conversion info since 1996.
Share Your Feedback    
       
 
  PRINT PAGE 
 
 
RV Classifieds
  1999 Prevost Le Mirage XL-45 Country Coach - $270,000
  2005 Coachmen Sportscoach Elite 401 TS - $120,000
  RV'ers Financial News - FREE Subscription
  1982 MCI MC-9 - $55,000
  1993 Sea Breeze Seabreeze - $19,995
  VIEW ALL
  Search RV Classifieds  
  Classifieds Policies
  Benefits for Dealers  
  Sell Your RV  
  Dealer Signup  
 

Useful Links
 
RV Community
  Discussion Groups  
  RV Articles  
  RV FAQs  
  RV Classified Ads  
  Virtual RV Park  
  Shop at our Store  
  RV Lifestyle Books  
  Rate Your RV  
AllThingsRV.com
  MyRVGuide.com  
  RVMechanic.com  
Advertise With Us
BECOME A MEMBER
RV Resources
RV Storage in New Mexico
Free Car Buying Advice
Sculptures for your RV
Visit Rio Rancho, NM for Winter
  RV Dealers  
  RV Manufacturers  
  RV Rentals  
  RV Glossary  
  RV Types  
  RV Ratings  
 

Hooking up a heater core

Home > Discussion Forum > Mechanic's Corner - Engines

Email Author email Dan  Reply to Message reply to message  Post New Message post new message      search forums
hidden layer
ATTENTION: All Postings that advertise items for sale will be deleted from the Discussion Forum. You may post sale items for free in the Classifieds section. Sign up now.
All Messages in ThreadAuthorDate
Hooking up a heater core Dan 12-21-06  
I recently purchased a used RV and noticed that the heater core was disconnected. I purchased a new heater core and am ready to install. I noticed that heat is controlled by closing off coolant to the heater core. I am used to a door flap. Is anyone that knows how to make sure I install shutoff value in the right place? is it really a shutoff value or is it a limiter? I find it hard to believe that cutting coolant off to the heater core is a good thing. It seems it would cause air pockets. Anyone know about this kind of stuff?
Re: Hooking up a heater core chuck 12-22-06  
Hi Dan, the easy way to check direction of flow is turn the engine over to see what line the coolant is being pumped from. the shutoff valve goes on that line to the heater core. as for air pockets it does'nt work that way. the heater core always stays full of water. by closing the valve you are just stopping flow of hot water.
Re: Hooking up a heater core Dan 12-22-06  
Chuck, Thanks for the helpful hint. another question if you don't mind. I realize that it is a closed system but I thought the the flow of water had to circulate? If it doesn't then some other part of the motor will not get coolant.
Re: Hooking up a heater core Chuck 12-23-06  
Dan, Being a closed system it does circulate but under pressure. The water pump sucks the coolant from the bottom radiator hose and circulates it thru the engine and back thru the top hose. The heater box is infact just a small radiator with a feed and return hose. The heater box will always stay full even if the valve is not open and flowing. just remember always fill the system with the engine running to insure that you don't get any air pockets in the system. Make sure you have a working recovery tank filled to the proper level to keep the system full.
Re: Hooking up a heater core Dan 12-25-06  
Chuck

Thanks for all the help!
Re: Hooking up a heater core Gale Hawkins 10-25-07  
My 1992 has an H shaped set of bypass made out of copper right before the shut off valve to the heater core that insures the coolant is passing through the heater hoses to and from the engine.
Required fields in red
For more info about a field, place your mouse over the More Info icon.
Subject:
Your Name:
Your Email:
Message:



Code is case-sensitive. Helps stop SPAM.
       



Call for pricing
PRIVACY POLICY  |  TERMS & CONDITIONS  |  © 1996 - 2009 RV-Coach Network - All Rights Reserved  |  Web Site by ITtelligent