Overheating Issue

[Usmc1028]

Auto. As i've said before, i've already bleed the syste multipule times trying diff methods. Still overheating

[racingbmwm3]

let us know if the radiator swap fixes it.
and you know this was a good engine before you swapped it right?

[bcredliner]

Have you checked if the aux fan and fan clutch is operating normally? Have you tried changing the radiator cap. Have you pressure tested the system?

Do I have it right that even with heater on when driving, after 15-20 minutes it overheats?

Does the needle peg, go to 3/4 to peg or what?

[Usmc1028]

Originally Posted by bcredliner

Have you checked if the aux fan and fan clutch is operating normally? Have you tried changing the radiator cap. Have you pressure tested the system?

Do I have it right that even with heater on when driving, after 15-20 minutes it overheats?

Does the needle peg, go to 3/4 to peg or what?

Yes the Aux fan still kicks in, Fan clutch is good as far as i know. Cap is new. No i have not pressure tested it. It only over heats to 3/4 when heater is off. When heater is on it needle is at 2/4. Temp reaches about 120c with heater off while driving and heater on it runs about 100-107 driving. Im sure it will go over 120 but i dont want it to go that far to find out.

[Clockwork]

I'd say a thermostat stuck closed therefore heating up adn getting rid of the heat by turning on the HVAC system does the trick (for now)

[Usmc1028]

Originally Posted by Clockwork

I'd say a thermostat stuck closed therefore heating up adn getting rid of the heat by turning on the HVAC system does the trick (for now)

I thought when the fail, they fail in a open position. I'm i wrong?

[Usmc1028]

As far as i know the motor was good, the motor came from a 2006 X5 involving a rear end collision. Yes its a new cap, every thing is new beside the radiator. Everything runs smooth as butter, only prob is this damn cooling prob. This weekend ill switch the Thermostat out first, if that does not cure the problem then ill switch the radiator, if that don't work then ill switch the water valve. If all the combined don't work then ill switch the dual temp switch as DORU posted. All of these will be coming from my dad's X5 Lord if none of these components cures this overheating problem. I have a big problem lol and i will have to take it to the oh so horrible dealership to see if the can tell me what the problem is, i'm not going to get them to fix it lol just diagnose. Thanks for all the help. Ill keep yall posted on how it goes. Lets just hope its something simple like a thermostat.

[bcredliner]

I have to ask--where is your Dad when you are trying to swap his good parts for your potentially bad parts?

[Usmc1028]

Originally Posted by bcredliner

I have to ask--where is your Dad when you are trying to swap his good parts for your potentially bad parts?

Duck taped to a pole!

With me. Were not putting my parts in his, im just taking his to see if it works fine in mine. If i find out what it is then ill go buy that part myself. Then we got to put his all back together.

[bcredliner]

Originally Posted by Usmc1028

Duck taped to a pole!

With me. Were not putting my parts in his, im just taking his to see if it works fine in mine. If i find out what it is then ill go buy that part myself. Then we got to put his all back together.

To all--please add this to the 3,l53,472,168 ways to use duct tape. I'm off to buy another roll