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 how to unblock heater core
#851962
12/09/07 09:52 PM
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Joined: Apr 2007
Posts: 105
OP
Wheeler
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hi,,,what is the best way to unblock the heater core on a 93 toyota 22re
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Re: how to unblock heater core
[Re: v8yota]
#851963
12/09/07 10:46 PM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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Disconnect hoses at firewall and back flush with a garden hose until the water runs clear. Then forward flush and repeat a few times until the water flows clear both ways.
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Re: how to unblock heater core
[Re: 4Crawler]
#851964
12/10/07 12:12 AM
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Joined: Oct 2007
Posts: 77
Getting the Wheeling Fever
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Disconnect hoses at firewall and back flush with a garden hose until the water runs clear. Then forward flush and repeat a few times until the water flows clear both ways. Works great if you apply pressure slowly. Some city water systems have enough pressure to blow the heater core if you pressurize one that's really stopped up too rapidly. Ask me how I know!
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Re: how to unblock heater core
[Re: yota4runna]
#851965
12/10/07 12:15 AM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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Yes, that is true. I use a trigger nozzle with a tapered end and shove that into the hose then slowly open the nozzle until water comes out the other hose. You can also see if back pressure is building up if water starts squirting back out of hose the nozzle is inserted in. Also, best to back flush (water into the outlet line) first as that will tend to push the clog back out the way it came in originally.
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Re: how to unblock heater core
[Re: 4Crawler]
#851966
12/10/07 03:41 AM
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Joined: Apr 2007
Posts: 105
OP
Wheeler
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thanks ,,,,which one is the inlet
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Re: how to unblock heater core
[Re: v8yota]
#851967
12/10/07 04:09 AM
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Joined: Apr 2000
Posts: 4,230
Roll Me Over
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The one with the on/off valve on the firewall.
David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA
"Serenity through Sobriety"
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Re: how to unblock heater core
[Re: OOP'S]
#851968
12/10/07 10:49 PM
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Joined: Apr 2007
Posts: 105
OP
Wheeler
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