Engine overheating?

The engine has overheated after pulling a Uhaul trailer about 150 miles. Fluid was leaking and a mech replaced a hose, serviced the system and did a good pressure check. Started again and in about 30 miles it overheated again. Hint, the heater blows hot air. Don't know where to go next. Thanks, Ron

Yesterday I replaced the water pump, hoses and thermostat. After driving around in the city the car seemed to be acting normal and no over heating. Well this morning driving to work on the freeway the car started to overheat and boiled over in the overflow tank and then on the ground. The clutch fan does work. I have been told it could be a few things. 1) The new thermostat is faulty, 2) Air pocket in the coolent system, 3) radiator is clugded, or 4) I just need to buy a new car (not an option). Do you have any ideas I can look at or suggestions on what to do.

Lucky for you replacing an entire coolant system is cheaper than buying a new car.
First and foremost you need to flush your radiator. You can get a can of flush from just about any parts store. Follow the instructions to the line. This should also remove any air pockets in the coolant system.
Another thing to check is your heater core. If your radiator turned out some nasty stuff then chances are you have a nasty core too. Unfortunately there is no reliable way to fix this problem. I usually recommend that it be replaced. It is a pain but if this turns out to be the problem then let me know and I can get you some help with that.
The usual plan I go with when troubleshooting a coolant system goes like this.
1. Check for leaks.
2. Pull the bottom radiator hose to see if any sludge pours out or if anti-freeze is nasty. If it is I go straight to step 5
3. Check the thrermostat.
4. Check the heater hoses.
5. Flush the system.
6. Start the vehicle and watch for overheating.
7. Use a water hose to blow out the heater core.

By step 7 if no problem has been found or if the vehicle is still overheating after the system has been fixed then unfortunately that usually points towards removing the heads to clean the coolant ducts. This can take a while and SHOULD be taken to a machine shop to be done. You can chance taking the block and heads to an automotive shop to have them put in a parts washer or always try the good ol' water hose before doing this. But, those two methods are much less reliable. Don't be discouraged though. I have only ever encountered that problem once with an old GM 350 with a ton of mileage on it. So. Chin up and skin some knuckles my man. =)

I replaced the waterpump on my dodge dakota v8 about a year and ahalf ago because it was leaking and have had over heating problems since. I flushed out the motor and the radiator and replaced the thermastat. About six months ago I blew a headgasket and didn, t know because it was just running with a pop. I tried to pinpoint the problem with no success. About tree months ago I overheated and blew out the radiator. I replaced the radiator and got it home and decided to see if I did blow a headgasket which I did. I replaced the headgaskets and run it til last week with limited success with it overheating. I decided to replace the waterpump again and I took two short trips around town and I think I blew the headgaskets again. What could be the cause of it overheating? What can I try next?

No I did't.

My truck overheated a few days ago, and the next day my oil pressure was high. Then my truck kept wanting to overheat when I was idling for 10 to 15 minutes one day then oil pressure would try to get high the next. So I changed my thermostat, and I drove it around today it did fine, and I went to the gas station and I had to let it idle for about 10 minutes and it acted like it was going to start overheating and the oil pressure started to get low. I’m not sure what to do next.

The 96 dodge dakota I am having overheating problems with has vacuum in the crankcase. I can hear it when I pull out the dipstick. What causes this?

Thanks for all your help.

Have replaced waterpump, thermostat, and fan clutch. Engine runs normal temp untill I get into stop and go traffic. Didn't run hot till after replacing leaking waterpump, this is the second waterpump first was faulty.

I noticed my truck started overheating. I stop let it cool down check the fluid an notice how rusty the ccoolant was. I start to head back home within 4 miles my truck was overheating. I get home pull the thermostat out. Put it in boiling water an it was opening just fine. I fire my truck up and breathe engine a little and the water is coming out if the block as it should. What do I do next. Note. When the truck was hot the top hose was hot an a bit pressurized

So, I have again after a bit gotten my truck running again, but after letting it idle out in the sun at around eighty two degrees Fahrenheit the temperature gauge was really high and the water in the radiator literally boiling. At cold the motor has a random and high idle that is really loud but once it warms up to a normal temperature it idles down, but touch anything like A/C or the clutch it begins to have a jumping idle again. After about twenty minutes with it idling it began getting hotter and hotter. I have replaced the coolant system radiator, water pump, thermostat, etc. Is this from the hot weather or could there be a problem? Also, I do not see a loss of coolant so I do not think there is a head gasket leak.