Freshly built b16a2 is overheating after 5-10 mins at idle and its driving me crazy... Ive bled the system by starting the car with the radiator cap off and adding coolant as needed, once it gets hot coolant gushes out the top. The fan doesnt kick on, the bottom hose stays COLD, and the heater blows cold. Ive jumped the ECT connector to make the fan stay on and it still overheats.

The thermostat is new and so is the water pump. I was told the radiator could be clogged since its been sitting for 2 months for the engine build. But i can squeeze the bottom hose and coolant will come out the water neck.

Another thing could be the headgasket(new) or warpage, 185 psi across all 4 cylinders, no coolant in the oil or vice versa. So im thinking its not that.

I thought i had the bypass hose(U shaped hose) and heater hose switched but one is bigger than the other so unless im stupid i think they are right. If anyone has a pic i would greatly appreciate it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeSH &raquo;</TD></TR><TR><TD CLASS="quote">Freshly built b16a2 is overheating after 5-10 mins at idle and its driving me crazy... Ive bled the system by starting the car with the radiator cap off and adding coolant as needed, once it gets hot coolant gushes out the top. The fan doesnt kick on, the bottom hose stays COLD, and the heater blows cold. Ive jumped the ECT connector to make the fan stay on and it still overheats.

The thermostat is new and so is the water pump. I was told the radiator could be clogged since its been sitting for 2 months for the engine build. But i can squeeze the bottom hose and coolant will come out the water neck.

Another thing could be the headgasket(new) or warpage, 185 psi across all 4 cylinders, no coolant in the oil or vice versa. So im thinking its not that.

I thought i had the bypass hose(U shaped hose) and heater hose switched but one is bigger than the other so unless im stupid i think they are right. If anyone has a pic i would greatly appreciate it.


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first things first, go out and pick up another thermostat a honda oem one preferably- pop that in and give it a try. it could be air in the system in a place where it cant get pushed out, such as if you blocked off the iacv/fitv from getting coolant. pop one of those lines off and see what comes out, but be careful not to get burnt lol.

 

I think i got it all sorted out today. Took the brand new autojunk thermostat out and ran it without one...What do know, I got heat, the fan kicked on, and not a lick of overheating. Going to honda tomorrow for a new thermostat.

 

told ya
hope it works good