ParadiseXJ
NAXJA Forum User
- Location
- Paradise, CA 95969
OK fellas...I'm officially desperate.
Still struggling with cooling system FUBAR. When engine heats up and t-stat (new 195 stant) opens it starts blowing coolant out the overflow at idle OR at RPM's. ALL the cooling components are less than 3K miles or newer. 2 row CSF all metal radiator...1988 4.0L converted to open system...3K miles ago. I don't have a heater valve, I deleted it when I did the conversion. I know you've heard this all before, but I can't drive my truck anywhere without it getting HOT and blowing coolant. WTH??
I have tested:
Help me Obi-Wan Kenobi...you're my only hope.
Still struggling with cooling system FUBAR. When engine heats up and t-stat (new 195 stant) opens it starts blowing coolant out the overflow at idle OR at RPM's. ALL the cooling components are less than 3K miles or newer. 2 row CSF all metal radiator...1988 4.0L converted to open system...3K miles ago. I don't have a heater valve, I deleted it when I did the conversion. I know you've heard this all before, but I can't drive my truck anywhere without it getting HOT and blowing coolant. WTH??
I have tested:
- New catalytic converter, new exhaust manifold, new gasket & flange donut.
- compression - good (great actually) 119-124 within 5 psi across the board. No adjacent discrepancies.
- No water in oil, no oil in water
- NO driveability issues. Idles smooth at ~700-800
- exhaust gases (block tester) - none - tested it 4 times, with different fluid each time
- heater core - clear - no rust, crud, junk or small animals
- radiator pressure - holds pressure at 20 psi overnight - good, no leaks.
- cap - new 16 lb. - holds pressure @16 lbs for a couple of hours (the longest I've let it go)
- ZJ HD fan clutch
- all hoses - no leaks - spring in lower hose
- coolant QUALTY...it's new, and it's fine. 50/50 Prestone Green (ethelyne glycol) and distilled water.
- air bled from system...4 or 5 times and each time I have had to replace coolant.
Help me Obi-Wan Kenobi...you're my only hope.
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