Ranger Mark
Member
- Joined
- Dec 19, 2017
- Messages
- 67
- Reaction score
- 19
- Points
- 8
- Location
- So. Cal
- Vehicle Year
- 1996
- Make / Model
- Ford
- Engine Size
- 3.0L
- Transmission
- Automatic
- My credo
- Alumni: Hard knocks F.U.
96 3.0 automatic rwd
Pressure building in cooling system. Unable to squeeze upper hose. Does not overheat. Does not push coolant into overflow tank. It does draw it back in when cooling. Does loose water when capped. No evidence of where it is going. (No white smoke, exterior leaks, etc.) Uncapped, (with funnel in place) coolant keeps expanding. Only time I have air bubbles is about 10 - 20 seconds after revving engine and squeezing upper hose.
New caps (tried a couple different ones). Water pump is good. Tstat verified ok. Block test shows no exhaust gasses present. Glove test was negative. Lower hose cool to touch but firm with cap off.
It's a simple system and I know I'm over thinking it. Could a blockage of the coolant passage's be the cause? I keep going back to head gasket, but maybe cracked head or block? As far as the caps go, if there is air in the system, 15 psi of air vs. 15 psi of coolant is not the same. Air is compressible but water is not. (This is where I'm over thinking it somehow)
Pressure building in cooling system. Unable to squeeze upper hose. Does not overheat. Does not push coolant into overflow tank. It does draw it back in when cooling. Does loose water when capped. No evidence of where it is going. (No white smoke, exterior leaks, etc.) Uncapped, (with funnel in place) coolant keeps expanding. Only time I have air bubbles is about 10 - 20 seconds after revving engine and squeezing upper hose.
New caps (tried a couple different ones). Water pump is good. Tstat verified ok. Block test shows no exhaust gasses present. Glove test was negative. Lower hose cool to touch but firm with cap off.
It's a simple system and I know I'm over thinking it. Could a blockage of the coolant passage's be the cause? I keep going back to head gasket, but maybe cracked head or block? As far as the caps go, if there is air in the system, 15 psi of air vs. 15 psi of coolant is not the same. Air is compressible but water is not. (This is where I'm over thinking it somehow)