Coolant disappears, overflow stays full. How do you dx intake gasket leak? | Ford Explorer - Ford Ranger Forums - Serious Explorations

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Coolant disappears, overflow stays full. How do you dx intake gasket leak?

Terry_Jim

Member
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August 1, 2009
Messages
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City, State
Council Bluffs, Iowa
Year, Model & Trim Level
1992 XLT
My 1992 XLT
165,000 miles
is using coolant, not a lot, quart a month tops.
I replaced radiator when I bought it 5 years ago.
haven't run leak test yet,
Odd thing is that the overflow remains full.
2 Questions
-Why isnt it drawing coolant from the overflow tank?
- How do you diagnose intake manifold leak vs. head gasket leak?

Ideas? Thanks!
 
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Gary Crist

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If it isn't drawing coolant from the reservoir, how
do you know it is drinking coolant unless the
radiator cap is faulty?
 
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94Eddie

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Regardless of what might be going on you should see some amount of rise and fall in the reservoir if there is a properly functioning radiator cap and the connecting hose is not clogged. You might want to check for combustion gases in the coolant. There are kits and test strips you can buy to do this.
 
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Terry_Jim

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City, State
Council Bluffs, Iowa
Year, Model & Trim Level
1992 XLT
If it isn't drawing coolant from the reservoir, how
do you know it is drinking coolant unless the
radiator cap is faulty?
Coolant level in radiator drops, coolant reservoir bottle stays full.
 
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Terry_Jim

Member
Joined
August 1, 2009
Messages
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City, State
Council Bluffs, Iowa
Year, Model & Trim Level
1992 XLT
Regardless of what might be going on you should see some amount of rise and fall in the reservoir if there is a properly functioning radiator cap and the connecting hose is not clogged. You might want to check for combustion gases in the coolant. There are kits and test strips you can buy to do this.
Hose isn't clogged original cap, may be weak. Thanks, I'll test it.
 
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