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Re: My honda repsol red light comes on and the heat gauge...
Empty coolant tank. Don't run it until the coolant level is checked and at the correct level. If this doesn't fix it you could have a failed coolant pump.
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If temp gauge is going into the red on a 3.4 engine it must be shut down or head damage can happen within minutes. I have a Monte Carlo that was overheating. I changed everything, thermostat, water pump, belt tensioner, radiator, all with no result. It would start out okay on a cold start but then I would come to a red light and the temp would creep up. Higher and higher until it neared the red zone. The heat would run cold. Most of the time, as soon as it was about to touch the red it would start to drop, the heat would blow hot again and all seemed okay but not for long. This would get worse and worse until the red hot light came on and I found myself on the side of the thruway. This problem is a blown head gasket. I had no other obvious signs, no white smoke from the exhaust, no oil in the antifreeze. I even changed the intake gaskets. Head gasket issues are common on the 3.4 liter engines.
Honda used to put the temp switch to turn the fans on in the bottom left side of the radiator. Not sure if that is the case on yours, haven't worked on a Honda recently. Anyway, the switch operates a relay, not the fan directly. The fans would normally come on around 200 degrees. Also, one of the should come on when the A/C is on to move air through the condenser. Hope this helps... good luck.
The good thing is your fan is working. Now , why do you think it is running hot? Is it boiling over? If not , you just have a gauge that reads high. Most Honda fans do not turn on until the needle is licking the red on the temperature gauge. If you are running hot you might want to try an antifreeze modifier like "ICE". Keep in mind a lot of Honda gauges get more inaccurate with age.
Hi dakota_love what we need to verify is if your cooling fan is operating properly, what you need to do is first bring temperature close to redline
(but don't hit redline it may cause a blown head gasket) than you need to open up the hood with the engine running (and temperature close to redline)at and see if any of the cooling fan in front of the radiator is coming on, please update once this part of diag. is completed so we know which way to direct for further diagnostic.
Synthetic blend lubricant with high thermal stability,
designed to meet the needs of the most technologically advanced
4-stroke motorcycle engines.
Excellent starting and lubrication in cold conditions due to its low viscosity.
Meets JASO MA API SJ requirements.
Its fine to change your oil with synthetic, Just be sure that you use synthetic from now on... I don't think its advisable to switch back to regular oil after using synthetic.
You didn't say what kind of car it was, but with no heat and high readings on the gauge, my guess would be your coolant level. If that isn't the problem, then try replacing the thermostat. Other possibilities would be a defective temp sensor, or a bad electric fan on the radiator.
This is a pretty common phenomenon. Air is moving through the radiator when the car is in motion, but not when it stops (unless the fan is on). Make sure the fan is working on the car, and don't let the gauge go much over half-way.
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