So i blew my engine not to long ago it had a rod knock pretty bad so i finished her off, i bought an engine with 30k miles on it took the old one out and put the new one in starts and drives but not very far before the car starts to over heat. it’s not actually overheating. we plugged a computer up the the OBDII and it says the car is running at 230 degrees plus but the coolant temp is at about 113-130 not even getting that hot but the computer is saying the car is overheating. i’ve changed the water pump coolant temp sensor flushed the system to see if there was any blockage flushed the radiator as well even put the asian coolant in it and it’s still “overheating” what can i do to fix this?

 

I suspect you have air bubbles in the system that messing with the temp readout …

You could do a continuity test between the ECU connector and the engine coolant temp sensor to ensure you have a good connection.

When you plug the OBD2 reader into the car and within a few secods does it give you a 230degree ECT readout?

 

When you plug the OBD2 reader into the car and within a few secods does it give you a 230degree ECT readout?[/QUOTE]



No sir it takes a while to read the 230 but the coolant is not running that hot

 

and how are you gauging engine coolant temp when its in the 130degree range?

Have you bled and rebled, and then rebled, and then rebled the rebleed? Try that and the rebled it two or three more times …

 

Also, using a Lisle funnel will help the OP to burp the system more effectively. I swear by mine and not all noobs have even heard of them.

 

no the car idles at operating temps it’s when i start to drive the car about 5-7 minutes it shoots up to hot.

 

well i may be a noob since i’m no mechanic but i have on and used one my stepdad is a mechanic and one of the smartest dudes i know and neither of us can figure it out even with his brain power i just came on here to see if there was other troubleshooting ideas i could do other than what i have done

 

i did it a total of 8 times the shop i sent it to did it a total of 4 times the shop its at rn is doing the same i don’t know exactly how many times they have done it tho but it continually burps/doesnt stop burping even with the front end lifted up.

 

Any steam out of the exhaust ?

Do a pressure test on each cylinder.

 

nope to steam but we can see about a pressure test thank you!

 

Yea - logical next step would be a comrpession test -

 

i’ll get it done thank you i’ll let you know what happens

 

??? What happened ?