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Problem for Buick 1995 Roadmaster
How do I change the heater core in my 1995 Buick
Clarification Request
Posted by motor1258 on Nov 07, 2009
Sorry but I have to ask, Is it leaking?
Solution #1
posted on Nov 07, 2009
- Drain anti_freeze low pressure air through the heater core will help empty it)
- Disconnect Heater core hoses on the engine compartment side of the firewall.
- Remove cover panel under dash.
- Remove dash board brace (small support brace that runs from firewall to glove box shroud surround.)
- Remove lower air box section. ( Many small screws so be sure you get them all)
- Remove air conditioning evaporator (Some times this requires the disconnection of hoses in the engine compartment, But try to work around that first to avoid having to recharge your air conditioner.)
- Remove the heater core mounting straps and screws.
- Wiggle the heater core towards the glove box to extract the steel hoses from the firewall bushings/seals.
- Be careful not to spill any remaining anti-freeze on the carpet.
- If you had a leaky heater core be sure to clean the air box the best you can to keep the anti-freeze smell out of the car.
- Reverse this procedure to install the new heater core.
If I left any thing out please feel free to add comments to these instructions. Generally these instructions should cover most years of Buick Roadmasters.
Just an additional note:
If you have to disconnect your air you may have to upgrade your entire system to the new R34 system instead of R12 because of the new environmental laws in some areas. Try to avoid this as best you can because R34 is not as effective in an older systems as it is in newer systems simply because the evaporator and condenser are smaller and they need to be large to transfer the heat in the R34. It's not nearly as effective at the transfer of heat as the environmentally unfriendly R12 was.
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