UPDATE (weak cylinder): 04 D2 Running hot under load
Hoping Dweb team can help provide some logical next steps to fix this issue. Planning a short trip to Baja during labor day weekend and hoping to get this problem rectified.
History and equipment:
2004 D2
Owned the truck since 2008.
Lifted with 33's, armor, winch, lights, etc
Never boiled over.
Only "overheated" once (recently). First time stock guage moved above center
Scanguage to monitor
About 4 months ago I replaced the fan/clutch, radiator (nissens), and T-stat (180* OEM). System was also flushed. Also stopped using Dex and now using Peak global lifetime. Why did I replace everything? The engine was running hotter than I wanted especially on long trips through the desert. Although it never got above 235* even at 100* outside and driving up a hill/mountain with AC on. And always cooled down. Normal temps were in the 198-208* for everyday driving.
Since I've replaced the parts the truck is running around 198 - 204 around town with AC on but when it's under load it consistently get's hot (freeway speeds, mountain, even some longer hills around town) and it will climb to 220* quickly and higher. But always cools back down and motor can idle and stat at 200*
A recent trip to Big Bear saw my first "over heating". Before climbing the mountain the engine got to 245* and stock gauge moved to 3/4. I quickly pulled over and let it cool down. It was 100* outside and AC was on. After letting it cool down I continued but with AC off then started to head up the mountain grade. It jumped to 240* and I pulled off again to let it cool. I removed the grill (a little more airflow) to try one last time and made it up the mountain going very slow. Wheeled that day and never got above 215*
What seems to be working:
Fan and clutch
Radiator (20* difference between in and out hoses). LR shop also placed cardboard to block airflow and engine temps climbed but as soon as the board is removed the motor cools down quickly.
T-stat (but maybe it's sticking?)
Block test was done by my LR shop and came back good.
System bled and I don't believe to have any air
New expansion tank cap
New waterpump (replaced 2 weeks ago)
Electric condensor fan is working
Temp sensor is new and IR therm confirmed working properly
What are the logical next steps?
LR shop wants to install a second electric fan, oil cooler, etc. But I feel like that isn't addressing the issue.
If the block test came back fine that should mean the head gaskets and any other more serious internal issues like cracked block or liner are good right?
I'm thinking of having the cats checked to make sure flow is good. Only code I get is P0327 (knock sensor) which I've had for a long time on and off.
What's next? Thanks for the help.
Hoping Dweb team can help provide some logical next steps to fix this issue. Planning a short trip to Baja during labor day weekend and hoping to get this problem rectified.
History and equipment:
2004 D2
Owned the truck since 2008.
Lifted with 33's, armor, winch, lights, etc
Never boiled over.
Only "overheated" once (recently). First time stock guage moved above center
Scanguage to monitor
About 4 months ago I replaced the fan/clutch, radiator (nissens), and T-stat (180* OEM). System was also flushed. Also stopped using Dex and now using Peak global lifetime. Why did I replace everything? The engine was running hotter than I wanted especially on long trips through the desert. Although it never got above 235* even at 100* outside and driving up a hill/mountain with AC on. And always cooled down. Normal temps were in the 198-208* for everyday driving.
Since I've replaced the parts the truck is running around 198 - 204 around town with AC on but when it's under load it consistently get's hot (freeway speeds, mountain, even some longer hills around town) and it will climb to 220* quickly and higher. But always cools back down and motor can idle and stat at 200*
A recent trip to Big Bear saw my first "over heating". Before climbing the mountain the engine got to 245* and stock gauge moved to 3/4. I quickly pulled over and let it cool down. It was 100* outside and AC was on. After letting it cool down I continued but with AC off then started to head up the mountain grade. It jumped to 240* and I pulled off again to let it cool. I removed the grill (a little more airflow) to try one last time and made it up the mountain going very slow. Wheeled that day and never got above 215*
What seems to be working:
Fan and clutch
Radiator (20* difference between in and out hoses). LR shop also placed cardboard to block airflow and engine temps climbed but as soon as the board is removed the motor cools down quickly.
T-stat (but maybe it's sticking?)
Block test was done by my LR shop and came back good.
System bled and I don't believe to have any air
New expansion tank cap
New waterpump (replaced 2 weeks ago)
Electric condensor fan is working
Temp sensor is new and IR therm confirmed working properly
What are the logical next steps?
LR shop wants to install a second electric fan, oil cooler, etc. But I feel like that isn't addressing the issue.
If the block test came back fine that should mean the head gaskets and any other more serious internal issues like cracked block or liner are good right?
I'm thinking of having the cats checked to make sure flow is good. Only code I get is P0327 (knock sensor) which I've had for a long time on and off.
What's next? Thanks for the help.
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