How to replace a heater core in a volvo s70?
FIRST OF ALL YOU NEED A HAYNES OR CHILTON REPAIR MANUAL.IT WILL TELL YOU HOW TO GET TO HEATER CORE.AND YOU NEED TOOL NO.155 8957 DISCONNECT THE HEATER HOSES FROM HEATER CORE.AND YOU NEED A TORX 20 SCREW DRIVER TO REMOVE SOUND PROOFING PANEL TO DASHBOARD SCREWS.
Double check to ensure that your repair plan is not limited to to heater core, normally it is recommended to change the thermostat on at the same time.... it is a $30 part which often solves much grief in diagnosing other 'coolant' related issues.
Don't forget to bleed the system after changing the heater core and/or thermostat. A common misconception is that the overflow cap can bleed the system... for safety sake, use the old fashion way of bleeding it over a one hour period and adding 50:50 antifreeze when the overflow demands it. Hope it helps.
SOURCE: Replace Heater Core for Volvo S70 (1999)
It is your heater core. I fixed mine for $144. Ordered the new part on Ebay and followed these instructions http://www.volvospeed.com/vs_forum/index.php?showtopic=9717 It was very simple, I'm a middle age grandmother! The hardest part was cleaning up all the antifreeze. You will need a shopvac, a small one is $20 at WalMart.
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