Out of curousity, how are you positive the radiator is good? Did you take it out and have it cleaned and flow tested? Your water pump may also be no good even though its not leaking. Ive had 2 cars in the past, both piston engines, give me similar problems, they would run hot only when driving, and not idling or slower driving. So it meant that the fan which dis-engages at higher speed was no longer keeping the car cool. On my truck, it turned out to be the radiator, my stock one was fine, in the sense that it wasnt leaking and it flowed good, but being as the truck originally came with a V-6, and now it has a AMC 360 in it, it wasnt cooling enough, the thing wouldnt over heat, but it would run too warm on the highway, or any steady driving over 45-55 mph or so. Is your car stock? Because if its not, the radiator may be the culprit. The other car drove me so damm crazy, I also went through the basics, and still it ran hot. It turned out to be the water pump, it wasnt leaking, but the impeller inside had gone to ****. You could try grabbing the pulley on the front of the pump, and see if you can wiggle it up and down. If your pump is real old, they arent that much money, and you may want to change it if all else fails. Unless its a air problem, then all this typing was a waste, lol. Oh- then there was this time on 2 seperate Trans-Ams I had, where I ripped the spoiler off under the car, that caused both of them to run hot as well because it wasnt sucking air into the engine compartment anymore. Also- do you still have your fan shroud??

Take your car in and have it tested! You'll pull your hair out replacing this and that to no avail if you have coolant leaking into the motor. They can test your coolant for the presence of exhaust.



Unless you get a V-10 or V12 in your next car... you will certainly miss the smooth power of the Rotary. I still kick myself and wish I would have never gotten rid of my R-100 for a boinger.

ok today i was drving home and the temp was about 3/4 the way up and before i knew it the coolant alram went off and all i herd was a bang,bang,bang sound comng from under the hood of my car! what the %$#(* the mecanic told me it was the normal range to operate in guess the guy was wrong. so i had it towed backa t about 11:00 at night. i still dont understand what is wrong. i know the radiator is fine because i flushed it completely and water flowed through it like it should,i know what im talking about,i bledd the radiator 4 ******* times the oter night to no prevail and added a new thermostat that engages 15 degrees cooler and bought a new radiator cap and put in prolong additive with te radiator fluid. i swear to god im going back to pistons,im getting so close,piece







waste those p.o.s. honda's!!!!!!!!seriously!!!!! :teufel: :thefinger: :newburn: https://www.nopistons.com/forums/pub...IR :thefinger:

Do you really think those problems can't be found on pistons? BTW what was that bang-bang noise anyway? If your coolant level light is coming on and off, it means there's air in the radiator. I don't know what's the problem but I've never had any problem bleeding the air out of my engine for 12 years. And temp range of operation is quarter to half at most in the worst case. Consider replacing the water pump if you're 100% sure of the rad and thermostat. You could also check the temperature of the oil cooler, the bypass valve may be stuck. but I don't think it would give this huge effect.

There are only so many things that can cause overheating.. sounds like you covered most of them...but only by taking the top off and actually looking into the core of the radiator can you be sure it is flowing porperly. My old 12a had a internal coolant problem, blow by into the combustion chamber of the front rotor....that was causing my overheating and loss of coolant problem...kissed that motor goodby.. :madgo: Good luck... :thumbs-up:

I think you could be right, in that case the air is coming from a combustion chamber and it should have some trace of combustion residue floating in the coolant and even smelling weird. That would explain alot.



Good luck! :thumbs-up:

Yep same as a bad head gasket in a boinger...runs hot and fouls the coolant. if it gets bad enough it will blow coolant out of the overflow jug when it overpressurizes the system. But I would check the radiator first.... :dontgetit: