b20 over heating + iac
05-07-2011, 09:06 AM
#1
for alarms/rmt-strts
Thread Starter
Join Date: Aug 2004
Location: pensacola, FML FL
Posts: 2,320
Likes: 0
Received 0 Likes
on
0 Posts
b20 over heating + iac
have a b20b in an ef sedan that i just had more head work done to. So i went to the junk yard and snagged the temp sensor that goes onto the thermostat housing because mine was cracked then finally broke.I went to a buds house to put it on and the way home the car still over heated. I did notice that the thermostat was not opening but since it is a jdm motor i figured it was just old. I got a new one today and boiled the old one just to be sure. well the old one opened and the new one still wont open. WTF!!!?!?!?!?!?!?!?!?
Also now im throwing a IAC code that i didnt throw before the valve job.
if possible can someone post how my hoses are supposed to be ran? thermostat not kicking on and neither is the fan.
Also now im throwing a IAC code that i didnt throw before the valve job.
if possible can someone post how my hoses are supposed to be ran? thermostat not kicking on and neither is the fan.
05-07-2011, 03:52 PM
#2
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: b20 over heating + iac
The fan obviously needs to be fixed, and that's an easy thing to troubleshoot. The fan relay will turn on when the fan thermoswitch trips, and the fan will turn on. You can easily test the thermoswitch, and you can easily test if the fan is getting power.
You might have got a defective new thermostat if it's not opening. But, you said the old one opened so it doesn't sound like the thermostat is the problem. So that says that something else is preventing the coolant from flowing, such as a clogged radiator or broken water pump.
You haven't said very much about the overheating behavior, such as how long it takes to overheat, and whether it only starts overheating when it's sitting still, etc.
You might have got a defective new thermostat if it's not opening. But, you said the old one opened so it doesn't sound like the thermostat is the problem. So that says that something else is preventing the coolant from flowing, such as a clogged radiator or broken water pump.
You haven't said very much about the overheating behavior, such as how long it takes to overheat, and whether it only starts overheating when it's sitting still, etc.
05-07-2011, 04:05 PM
#3
for alarms/rmt-strts
Thread Starter
Join Date: Aug 2004
Location: pensacola, FML FL
Posts: 2,320
Likes: 0
Received 0 Likes
on
0 Posts
Re: b20 over heating + iac
The fan obviously needs to be fixed, and that's an easy thing to troubleshoot. The fan relay will turn on when the fan thermoswitch trips, and the fan will turn on. You can easily test the thermoswitch, and you can easily test if the fan is getting power.
You might have got a defective new thermostat if it's not opening. But, you said the old one opened so it doesn't sound like the thermostat is the problem. So that says that something else is preventing the coolant from flowing, such as a clogged radiator or broken water pump.
You haven't said very much about the overheating behavior, such as how long it takes to overheat, and whether it only starts overheating when it's sitting still, etc.
You might have got a defective new thermostat if it's not opening. But, you said the old one opened so it doesn't sound like the thermostat is the problem. So that says that something else is preventing the coolant from flowing, such as a clogged radiator or broken water pump.
You haven't said very much about the overheating behavior, such as how long it takes to overheat, and whether it only starts overheating when it's sitting still, etc.
05-08-2011, 07:51 AM
#4
for alarms/rmt-strts
Thread Starter
Join Date: Aug 2004
Location: pensacola, FML FL
Posts: 2,320
Likes: 0
Received 0 Likes
on
0 Posts
Re: b20 over heating + iac
when i bled the system i didnt bleed it for long enough. i re bled the system today for about 30 min and the thermostat opened up fine. also the sensor i got from the junkyard was bad so that explains the no fan thing
05-08-2011, 09:38 AM
#5
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: b20 over heating + iac
That makes more sense. What you were saying about the heater core didn't match up with the rest of the problems you were describing.
Thread
Thread Starter
Forum
Replies
Last Post