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Old 07-10-2014, 02:15 PM   #1
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"86 Winn Chieftan Heater Core replacement

Does anybody know the exact steps of replacing the heater core from an '86 Winnebago Chieftan? I would like to perform the work by myself and then document it to share with others.

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Old 07-10-2014, 02:58 PM   #2
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Step 1:
Remove everything in the way.
Step 2:
Remove and replace heater core.
Step 3:
Put everything back that you removed in Step 1.

Sorry. According to what chassis you have, you might be able to find instructions for a pick up or truck by the same make. Of course Winnebago builds their own frame to bury it.


Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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Old 07-12-2014, 06:43 AM   #3
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You may have a GM chassis, and the heater core may be inside a molded plastic plenum. My '99 GM chassis has similar construction and it seemed like half of the firewall and/or dashboard would need to be disassembled to access the heater core. Someone on the Safari Trek forum posted a procedure to use the cutting blade on an electric soldering iron to cut/melt a section out of the plenum to access the heater core. I did this, and it was much easier than any possible alternative. I found a heater core at Mill Supply | Snow Plow Parts - Stepvan Parts - Mower Parts - Autobody Restoration Parts . When finished, I replaced the cut section, and secured it with HVAC Aluminum tape.

Originally Posted by LSUTiger61 View Post
Does anybody know the exact steps of replacing the heater core from an '86 Winnebago Chieftan? I would like to perform the work by myself and then document it to share with others.
George Schweikle Lexington, KY
1999 Safari TREK 2830, FMCA 190830, Safari International chapter
1995 Safari TREK 2630, 1983 Winnebago Chieftain, 1976 Midas Mini
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heater, replace, replacement

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