over heating question
09-05-2011, 09:15 PM
#1
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over heating question
trying to help a friend out, he doesn't have a haynes manual and his can is over heating.
both upper and lower hoses are hot
both fans run with ac
driver fan runs when off(pretty sure it's the driver)
no fans run while car is on and ac is off.
he replaced a temp sw. on the intake, i had 5v on one lead, sw. had 105 ohms of resistance while hot.
he has a group of 5 or 6 relays on the top driver side of the radiator, one controlled the fans when the car is off( or when the ac was on can't remember) it was a constant hot with a negetive signal, probally an AC relay. i wired a sw. from the neg. to that relay so he can at least get some cooling but it appeared that this relay was fine, so i'm guesing he has another relay that may be the culprit, of a second sw. i didn't see anything on the bottom pass. side (addmitedly i didn't look to hard)
will try to answer any questions to the best of my ability(again not my car, and not planning on putting too much time into this)
in advance thank you.
both upper and lower hoses are hot
both fans run with ac
driver fan runs when off(pretty sure it's the driver)
no fans run while car is on and ac is off.
he replaced a temp sw. on the intake, i had 5v on one lead, sw. had 105 ohms of resistance while hot.
he has a group of 5 or 6 relays on the top driver side of the radiator, one controlled the fans when the car is off( or when the ac was on can't remember) it was a constant hot with a negetive signal, probally an AC relay. i wired a sw. from the neg. to that relay so he can at least get some cooling but it appeared that this relay was fine, so i'm guesing he has another relay that may be the culprit, of a second sw. i didn't see anything on the bottom pass. side (addmitedly i didn't look to hard)
will try to answer any questions to the best of my ability(again not my car, and not planning on putting too much time into this)
in advance thank you.
09-05-2011, 10:43 PM
#2
Khmer Pride
trying to help a friend out, he doesn't have a haynes manual and his can is over heating.
both upper and lower hoses are hot
both fans run with ac
driver fan runs when off(pretty sure it's the driver)
no fans run while car is on and ac is off.
he replaced a temp sw. on the intake, i had 5v on one lead, sw. had 105 ohms of resistance while hot.
he has a group of 5 or 6 relays on the top driver side of the radiator, one controlled the fans when the car is off( or when the ac was on can't remember) it was a constant hot with a negetive signal, probally an AC relay. i wired a sw. from the neg. to that relay so he can at least get some cooling but it appeared that this relay was fine, so i'm guesing he has another relay that may be the culprit, of a second sw. i didn't see anything on the bottom pass. side (addmitedly i didn't look to hard)
will try to answer any questions to the best of my ability(again not my car, and not planning on putting too much time into this)
in advance thank you.
both upper and lower hoses are hot
both fans run with ac
driver fan runs when off(pretty sure it's the driver)
no fans run while car is on and ac is off.
he replaced a temp sw. on the intake, i had 5v on one lead, sw. had 105 ohms of resistance while hot.
he has a group of 5 or 6 relays on the top driver side of the radiator, one controlled the fans when the car is off( or when the ac was on can't remember) it was a constant hot with a negetive signal, probally an AC relay. i wired a sw. from the neg. to that relay so he can at least get some cooling but it appeared that this relay was fine, so i'm guesing he has another relay that may be the culprit, of a second sw. i didn't see anything on the bottom pass. side (addmitedly i didn't look to hard)
will try to answer any questions to the best of my ability(again not my car, and not planning on putting too much time into this)
in advance thank you.
is the temp gauge above the middle?
i'll check my service manual for this
09-06-2011, 07:15 PM
#3
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i understand it's normal for the fans to run but the problem is
both upper and lower hoses are hot(normal)
both fans run with ac(normal)
driver fan runs when off(pretty sure it's the driver)
no fans run while car is on and ac is off.(the problem)
i wired the fan so he can use a toggle switch. which can be a problem if someone accidently hits the remote start and the toggle switch is off and the car runs 15min with out any fans and it's 90 out. leaning toward a second tempature sw. i didn't see, or a bad relay.
both upper and lower hoses are hot(normal)
both fans run with ac(normal)
driver fan runs when off(pretty sure it's the driver)
no fans run while car is on and ac is off.(the problem)
i wired the fan so he can use a toggle switch. which can be a problem if someone accidently hits the remote start and the toggle switch is off and the car runs 15min with out any fans and it's 90 out. leaning toward a second tempature sw. i didn't see, or a bad relay.
09-06-2011, 07:26 PM
#4
Big plans not enough $$$
Did your friend check the thermostat? my brothers car had the same problem (1992 accord), the thermostat wasnt working so we changed it and it doesnt overheat.
09-06-2011, 08:46 PM
#6
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i told him to replace the t stat, but normaly if it's stuck closed the lower hose doesn't get hot, unless i'm misstaken, he said he read quite a bit about head gaskets on these cars but i didn't have time to do a compression test, but he didn't have any antifreze in the oil. i'll check to see if compression is equal across all the cylinders, but would a bad head gasket cause the fans to not turn on automatically? thanks for the responses.
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