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#1
08-19-2011, 12:10 AM
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Leaking Heater Core (A/C): By-Pass Question
64 GTO w/Air Conditioning...
In storage 26 years.. Believe the heater core is leaking. Understand this is a fairly involved repair. Would like to temporarily by-pass the Heater Core to stop the leaking until I can do the full repair. Any suggestions as to the best method? Was thinking of just running a single hose from Intake Nipple to Water Pump. Cap the Heater Core input/out? Which one is supply/return? Thanks!
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John '68 Firebird Ram Air 4-spd Conv. John 14:6 Semper Fi 
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#2
08-19-2011, 12:27 AM
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Yes, Just run the hose from the water pump outlet back to the intake nipple. water pump is the return.
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Its ok to giggle and snicker, Dont laugh and point |
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#3
08-19-2011, 09:28 AM
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Or, put a 5/8" and 3/4" ball or piece of round stock inside the two heater hoses and you're all set to go. No one would be able to tell the heater core is blocked off.
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BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#4
08-19-2011, 03:45 PM
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They also make caps that clamp on the inlet and outlet.
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Matt 1962 Grand Prix - Cameo Ivory|389 4sp|One-Owner Survivor 1964 GTO HT - Silvermist Grey|389 3x2s 4spd|A/C|Hurst Wheels|Frame-off|SOLD 1965 GTO Post - Mayfair Maize|421 3x2s TKO600|Pro-Touring| 1966 GTO HT - Barrier Blue|389 3x2s 4spd|Red Fenderliners 2005 GTO Coupe - Yellow Jacket|Magnacharged LS2 6sp|543hp/561tq|SOLD 2006 GTO Coupe - Spice Red|LS2 6sp|20k orig miles |
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#5
08-19-2011, 08:27 PM
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The method I gave you is by far the easiest solution-short term or long. It also does not alter the appearance of the engine compartment.
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BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#6
08-19-2011, 10:42 PM
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The flow to the heater core is shut off in some applications on 64 vehicles with a/c by using a water control valve. That means that the water pump does not need the return from the heater core. Water to the heater core comes from the water cross-over on the intake. I would make a couple of wooden plugs from dowels and put the hoses back on the heater core as Dick suggested until you can properly repair it.
Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#7
08-20-2011, 09:38 AM
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Thanks for the advice!
Planning to detail the engine compartment in the near future. At that time, we'll probably remove RH Fender to properly change the Heater Core (and have access to remove/reinstall the fasteners behind Inner Fender).
__________________
John '68 Firebird Ram Air 4-spd Conv. John 14:6 Semper Fi
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#8
08-22-2011, 07:28 AM
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Quote:
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#9
08-24-2011, 12:18 AM
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I have a 65 with A/C and do not ever remember having to take the fender off to get the heater core out????
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