What causes water pump fins to pit/corrode?
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From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
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Joined: Oct 2011
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From: Bakersfield CA
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Lubrication for one, don't seem to have an electrolisis issues, corrosion seems to be at bay, radiator quit rotting out, dissipates heat pretty well, lowers the freezing temp. IDK I started doing it for the corrosion benefit(I used to run straight water). Had the idea put in my head by an old schooler, same guy that taught me about shoe leather bearings.
CF Veteran
Joined: Oct 2011
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From: Bakersfield CA
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Shoe leather bearings can be found on usually unmolested old ford model As' and Ts', when some people were driving cross country back in the day if the engine started to knock they'd drop the pan and shim the bearings with shoe leather, tin can, pieces of belt. They'd do wheel bearings the same way. Don't think it would work too well on a high comp. motor though, but good to know if you're stuck somewhere and gotta get it going.
Straight water disipates heat better than antifreeze, you just gotta flush the system regularly.
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Joined: May 2008
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Year: 1988
Model: Cherokee
Engine: AMC242
Shoe leather bearings can be found on usually unmolested old ford model As' and Ts', when some people were driving cross country back in the day if the engine started to knock they'd drop the pan and shim the bearings with shoe leather, tin can, pieces of belt. They'd do wheel bearings the same way. Don't think it would work too well on a high comp. motor though, but good to know if you're stuck somewhere and gotta get it going.
Straight water disipates heat better than antifreeze, you just gotta flush the system regularly.
Straight water disipates heat better than antifreeze, you just gotta flush the system regularly.
I haven't seen shoe leather bearings in years!
When you say "Soluble Oil," what are you using? Is it like that stuff used in automated CNC machinery with an antifoam additive, or what?
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Joined: Oct 2011
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From: Bakersfield CA
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
If you're using straight water, add Water Wetter and it will cool even better (add WW if you're using coolant/water mix, same reason.)
I haven't seen shoe leather bearings in years!
When you say "Soluble Oil," what are you using? Is it like that stuff used in automated CNC machinery with an antifoam additive, or what?
I haven't seen shoe leather bearings in years!
When you say "Soluble Oil," what are you using? Is it like that stuff used in automated CNC machinery with an antifoam additive, or what?
It's rare you find someone else who's seen them.
Yeah pretty much, I either get it from work(out of a BOP accumulator) or the heavy duty bars leak with the tar beads, but I leave the beads in the bottle.
CF Veteran
Joined: May 2008
Posts: 3,018
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Year: 1988
Model: Cherokee
Engine: AMC242
Even got into one of those old GMC V12-702 engines, once upon the time (2-1/2-ton truck.) That crankshaft was awfully good for some bicep curls...
CF Veteran
Joined: Oct 2011
Posts: 1,268
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From: Bakersfield CA
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
First one of those old motors I worked on was a pontiac 305 straight 8, couldn't figure out why it had no oil pressure..LOL
To get back on topic, the antifreeze ratio was wrong needs to be at least 50/50
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Joined: May 2008
Posts: 3,018
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Year: 1988
Model: Cherokee
Engine: AMC242
"50-50" is just the most widely-used. Depending on operating climate, it can from 70-30 (coolant-heavy, for cold climates) to 30-70 (water-heavy, for hot climates.) I've not see it get outside of that range.
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Joined: May 2010
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From: Portland OR
Year: 96
Model: Cherokee
Engine: 4 liter
Perhaps 70% water in the Northwest may be a bit much lol.
After all my overheating issues when I replaced the entire cooling system, I was so nervous to overheat; and reading that h2O is better at dissipating heat,
I may have overreacted.
Guess I'll keep it 50/50 eh?
Don't know why I was so nervous to run 50/50 anyways.
New pump, new 2 core GDI rad, new thermostat and housing, ZJ fan clutch, all new hoses and a flushed system was probably all it needed, NOT more water
After all my overheating issues when I replaced the entire cooling system, I was so nervous to overheat; and reading that h2O is better at dissipating heat,
I may have overreacted.
Guess I'll keep it 50/50 eh?
Don't know why I was so nervous to run 50/50 anyways.
New pump, new 2 core GDI rad, new thermostat and housing, ZJ fan clutch, all new hoses and a flushed system was probably all it needed, NOT more water
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Joined: May 2010
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From: Portland OR
Year: 96
Model: Cherokee
Engine: 4 liter
This is a common problem with long-life antifreeze (OAT,HOAT & Dexcool) if not maintained, overheated,air in system tap water or wrong mix ratio. These coolants will cause several issues if not maintained.
When the coolant breaks down for any of the reasons I mentioned it will become highly corrosive and EAT metal and in the process of doing that it forms gas bubbles that will cause cavitation which will beat the hell out of the impeller.
It is prudent that you religiously maintain your coolant system. If you want to you can drain and flush and switch over to the old green conventional antifreeze and change coolant every 2 years and these "Dexcool" ( yes, they are all dexcool emulations) problems will go away.
When the coolant breaks down for any of the reasons I mentioned it will become highly corrosive and EAT metal and in the process of doing that it forms gas bubbles that will cause cavitation which will beat the hell out of the impeller.
It is prudent that you religiously maintain your coolant system. If you want to you can drain and flush and switch over to the old green conventional antifreeze and change coolant every 2 years and these "Dexcool" ( yes, they are all dexcool emulations) problems will go away.
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