Question about 1991 Honda Accord
On Honda's there a bleeder valve to bleed air from cooling system, if air trap in cooling system engine will over heat.bleeder valve is over to back of engine on passenger side on thermostat housing, open bleeder valve with 12mm socket with engine off and cold add coolant at radiator till no more air come's out of bleeder valve and close.
Posted on Nov 19, 2009
Did you replace the fan? How about the fan switch?
Here is some stuff to read about this system....please let me know what's up!
This switch is the primary controller of the operation of the radiator fan(s) used for cooling. When the coolant in the system reaches a pre-determined temperature, the fan switch closes and completes a circuit. The fans will be brought on. Generally, the switch communicates with the fan relay, although the later PGM-FI cars send the signal through one of the many solid-state controllers first. Do not assume that the switch is the only component in the radiator fan circuit which controls its operation. There are many other components whose failure may prevent the radiator fan from operating. If the fans are not working when the engine is very warm, check the fuses first.
On all vehicles except 1990-95 Accords and 1992-95 Preludes, the fan switch is located in the bottom of the radiator. On 1990-95 Accords (except V-6) and 1992-95 Preludes, the switch is located in the housing at the rear end of the coolant connecting pipe. This is the pipe running along the outside of the engine, just above the oil filter. The switch the only electrical component in the housing. On the Accord V-6, it threaded into the side of the coolant crossover pipe (not next to the bleed bolt) on the transaxle side of the engine.
Posted on Nov 19, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Feb 19, 2014 | 2001 Chevrolet Cavalier
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Apr 29, 2017 | 1996 Isuzu Trooper
Hello and welcome to FixYa!
If you have overheating problem, it can lead to multiple
issues. You may be running on low coolant that's why the vehicle overheats. If
that's the case, please add coolant and make sure that it sits on the right
level, too much coolant can cause overheating too for coolant will overflow.
The vehicle may have a faulty or worn out radiator blower
motor that's why it overheats. If that's the case then you will need a blower
motor replacement to resolve the issue.
If the radiator is clogged with dirt and rusts this issue
occurs too. The coolant doesn't flow normally on the cooling system if it's
clogged. If that's the case, I strongly suggest that you have the radiator
flushed to drain out dirt and rusts. If you think that the radiator served you
enough then it's better to have it replaced.
Please do check the radiator hoses, If you have worn out
hoses it can cause coolant leakage which can result to overheating. A tiny hole
is good enough for the vehicle to overheat.
A faulty thermostat sensor can cause the issue too. If you
have worn out thermostat, the fan may not trigger that's why the fan won't work
when under stressed conditions. A blown radiator blower fuse can cause this
issue too so I suggest that you check the radiator blower fuse and replace it
when necessary. What causes the radiator blower fan fuse to blow? It's because
of a failing radiator blower motor, If that's the case have the radiator blower
fan motor replaced.
If the fluid in radiator doesn't circulate then it means
that you have a blown head gasket or a faulty water pump. I suggest that you go
for the water pump replacement first specially if you think that it's near the
end of it's service life. Usually, water pops out the radiator when engine is
reved (a sign of faulty water pump and possible blown head gasket).
Hope you find this information helpful enough and thank you for using FixYa! Have a good one!
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