Advertisement [ ? ]
Site Links
- Lease Calculator
- Advertise on 9,500+ pages
- My Car ongoing Review
- Members' Chat
- Cars For Sale
- Car Dealers
- Honda "Fit" Manual
- Hyperflex Bushings
- For Sale
- Fix your Car
- Car Manuals
- other manuals - Reference Materials
- DIY Repairs
- Articles
- Video
- Link with Us
- Search Help
- Code your Mac!
- Fly, race, anything R/C
- DIY repair guides
- Z-Seven
- Mechanic's Blog
- Free Files
I have a 94 integra with an overheating issue.
Car: Acura, Integra, 1994, 1.8 non-vtec - Back to Fix-It - Acura Integra Repair Manuals
Q.hello, I have a 94 integra with an overheating issue. So far the water pump and thermostat have been changed.
The cooling system flushed and bled and I believe the radiator is fairly new.
The only way the car wont overheat is if the heater is at full blast. What could be causing the overheating?
I already checked/done: Have replaced water pump, thermostat, flushed and bled the coolant.
More Info required A little more information would be useful for narrowing down the alternatives:
Have you been losing coolant, or is the coolant level staying normal?
When it overheats now, how bad is it? Just higher than normal temp gauge reading, or steam and/or water pouring out of the engine?
Why were the waterpump and thermostat changed, were they bad or was that an attempt to fix the overheating problem that was there before?
Is the fan working properly? A failing fan could be turning, but slower than normal.
A cylinder leakdown test would tell you if you have a leaking head gasket. If pressure is leaking out of one cylinder and there are bubbles coming out through the coolant, there's the leaking cylinder.
The cylinder head could also be cracked or warped, causing more overheating due to leaks. They don't take overheating very well.
Do you have model-specific instructions for bleeding the system, and if not, how was it done? An air pocket inside the cylinder head could cause overheating like this. An air pocket in the heater core could make the heater put out only mildly warm air. Is your air HOT coming out the vents? I believe the heater works ok since it is able to keep your temps under control.
Addition The coolant stays the same, water pump and thermostat replacement where an attempt to stop the overheating.
When it start to overheat the themp gradually climbs up without stoping. Fans do work, and the with the heater on it blows hot air. I did bled the system by following an acura manual. No bubbles are visible with engine is on and radiator cap off.
Answer Hmm. I can't think of anything right now, I will give it some more thought and investigate it at my end.
I did have one similar case once though, where overheating couldn't be explained (everything either checked out or was replaced with new parts). Turns out the brand new thermostat was defective. So was the next one I got! I then bought one that cost 3 times as much, and the overheating stopped right away. All were made by the same market leading brand. I couldn't believe my luck.
You can test the thermostat by dipping it in boiling water. It should start opening in less than 30 seconds.
Answer The radiator fan is controlled by a module that monitors coolant temperature, oil temperature, and the a/c system. Based on the information available, the module then decides how fast to turn the fan. So the fan runs ate different speeds depending on the situation, simply seeing it turning isn't telling the whole truth. When the engine is fully warmed up and borderline overheating, the fan should have full power, close to what you measure from the battery terminals. If you have a voltmeter, you could check this to eliminate one possibility. Also with a stone cold engine and no keys in the ignition, try to reach down to the fan blade and turn it by hand. It should turn smooth and spin freely when you give it a little push.
One more question: Does it overheat in park or in slow city traffic, but cools down again at highway speeds? I'm trying to confirm or eliminate the fan from the list of possible causes. At highway speeds there is so much air being forced through the radiator that a fan isn't as critical for cooling, therefore a weak fan would cause overheating at slower speeds but be just fine on the highway.
when the a/c is turned on, one of the fans should soon turn on regardless of the engine temperature. I forgot about the A/C fan, sorry.
>>Contribute your Answer<< - Submit your Question