1shot
Active Member
- Joined
- November 10, 2006
- Messages
- 52
- Reaction score
- 0
- City, State
- Edmonton AB
- Year, Model & Trim Level
- '92 XLT 2wd
I got a 92 Ex 4.0 V6 Auto Eddie B with 200K. It OVERHEATS BAD, but ONLY ON HIGH SPEEDS.
okay I done some work on it but im starting to pull my scalp offa my head.
so far i have:
-New H2O Pump (Proven - from another truck with less than 10K)
-New T'stat (tried 2 a used one from a another truck and the new one)
-New Heater Core (a proven new core from another truck)
-New hoses throughout. (ALL new)
-New Aftermarket Radiator (on the truck for <20,000k)
-Replaced Clutch pack and 10 blade plastic fan from known truck
-OLD H2O temp sensor and gauge (but have been verified correct)
-truck shows steam at rad and resivoiur but no bubbles in rad.
-Coolant flow appears strong.
-truck shows NO steam or white smoke out of tailpipe.
-truck runs 100% with no rough idle or acceleration regardless of temp shown.
-plugs are all norm light brown. no white plugs.
-Using infra red temp gauge shows rad same temp across face.
NOW FOR THE DETAILS...
If I start and drive around town it works fine, gauge shows temp comes up as quickly as should, heat comes out of vents quickly, hot and before gauge shows temp deflection.
I can drive around city and stop at lights etc, with no problem for hours.
I can idle in driveway till tank is empty - stays inside of normal range - ie m in normal.
BUT BUT BUT if i get onto a highway within a few miles/KM it climbs up and gauge shows high (1 letter per km on standard gauge...(C BAR space N O R M A L space BAR H)) and it overheats and spits out coolant out of overflow tube to resevour. It especially!!! heats up quickly if i try to go up a hill. I can drive all day on flat slow speeds but instantly overheats on highway or going up a slope.
Now since I put new parts into it, it has improved slightly, but same problem persists. Driveable in city but overheats badly on hwy speed, night or day, hot weather or cold.
I'm figuring I'm down to a plugged new radiator or a very small exhaust gas leak thru a cracked head or gasket.
Any comments?
okay I done some work on it but im starting to pull my scalp offa my head.
so far i have:
-New H2O Pump (Proven - from another truck with less than 10K)
-New T'stat (tried 2 a used one from a another truck and the new one)
-New Heater Core (a proven new core from another truck)
-New hoses throughout. (ALL new)
-New Aftermarket Radiator (on the truck for <20,000k)
-Replaced Clutch pack and 10 blade plastic fan from known truck
-OLD H2O temp sensor and gauge (but have been verified correct)
-truck shows steam at rad and resivoiur but no bubbles in rad.
-Coolant flow appears strong.
-truck shows NO steam or white smoke out of tailpipe.
-truck runs 100% with no rough idle or acceleration regardless of temp shown.
-plugs are all norm light brown. no white plugs.
-Using infra red temp gauge shows rad same temp across face.
NOW FOR THE DETAILS...
If I start and drive around town it works fine, gauge shows temp comes up as quickly as should, heat comes out of vents quickly, hot and before gauge shows temp deflection.
I can drive around city and stop at lights etc, with no problem for hours.
I can idle in driveway till tank is empty - stays inside of normal range - ie m in normal.
BUT BUT BUT if i get onto a highway within a few miles/KM it climbs up and gauge shows high (1 letter per km on standard gauge...(C BAR space N O R M A L space BAR H)) and it overheats and spits out coolant out of overflow tube to resevour. It especially!!! heats up quickly if i try to go up a hill. I can drive all day on flat slow speeds but instantly overheats on highway or going up a slope.
Now since I put new parts into it, it has improved slightly, but same problem persists. Driveable in city but overheats badly on hwy speed, night or day, hot weather or cold.
I'm figuring I'm down to a plugged new radiator or a very small exhaust gas leak thru a cracked head or gasket.
Any comments?