1996 Honda Civic Hot temperature (only for high speed - lon

Your vehicle is not capable of heating and cooling down that quickly. It sounds as though your temperature sending unit is failing.

When the vehicle's gauge reads that it is overheating (in the red), turn your A/C on. If it blows out cold air, then your vehicle is NOT actually overheating.

Your radiator may just be weak at those high speeds. Is it the original radiator?

Hi chezunee,

Seems the radiator is partially clogged resulting in inefficient cooling when the engine is worked harder.

I would suggest getting the radiator serviced and coolant replaced.

Thanks for the answers guys!

KHLow2008 : I did, I have dserviced the radiator, it still happening. Maybe it worth to try to get it flush and put a new coolant?

Bluelighnin6 - I thought the same thing, but once when I keep running @ 100km/hr after it goes up to red, the hose broken! that means it is not just a false alarm :(

F4I_guy I don't think this is original radiator, is that the problem you reckon?

- FYI: I have to keep filling the engine oil weekly or at least once every 2 weeks as the oil just gone (evapotared?) is this also have the connection with my temperature problem? I guess I have to think about saving money for another car! :( too bad as I love this car!

Look at the front of the radiator, are the fins all bent and damaged? Usually this will not cause any a problem with normal use-age, but obviously your speeds are above average so you may have a weak radiator, clogged rad, poor flow to the rad (leaves, debris, bent fins, etc) all these things can cause poor cooling issues at those high speeds. I am definately leaning towards a poor radiator for this issue.

As for your oil consumption, you may have an internal problem. It may be, valve seals, piston rings, cylinder walls, etc. For this problem, I would first check for an oil leak (cam seals are common, oil pan gaskets are also) if there are no leaks then I would investigate the PCV system. Is the valve functioning properly? Is the vacuum source collapsed? If all these checks are good, then I would do a cylinder compression test. Even if the compression test checks out, you still may have a valve seal problem! With your type of mileage there are many possibilities to where your oil is going. Do some checks and reply back for further guidance!

I will check it, if its weak, its better to change the radiator rather than just change the hose (as I am sure the hose is weak) and coolant, isn't it?

Cheers!

Re; the oil, yes, there is a leak, but not much, and the weird thing is, it's not always leak! just sometimes (I kept checking my garage floor).

back! just changed the cambelt and check the waterpump whici apparently fine, but has changed the worn-out thermostat and top hose. But the problem still occur. I found that the radiator IS poor! I will change it tomorrow (if the mechanic working on Saturday), I really give up if after change the radiator the problem still occur! :(

Hey don't give up now, look how many people are trying to help you :) We won't give up, so try and hang in there. We'll try and save you as much money as possible and get your ride going again without overheating. Post the results of the radiator change and if it still does not help, we will dig deeper into our resources until we can find the issue without you replacing part after part.

You guys are really champion! Thanks for your support! I will keep informing you guys. Wish me luck tomorrow! Cheers!

Yep, we would not leave anybody hanging till we have exhausted our resourses.

If the radiator is partially clogged, it would cause high speed overheating. Seems we are nearing the solution and the last step should get the problem solved.

MERRY CHRISTMAS

Guys! thanks a bunch for your support! I have changed the radiator and so far it's still OK! I will go out of town soon and will inform you the result! You guys rock!

That is awesome news. Let us know how the trip goes.

Thanks for using 2carpros.com!

Woohoooooo thanks heaps guys!!!!!!!!! it is because of the poor radiator. I have tried long run@ 90-110 kms/hr out of town and it's all good! That means your answer is right: the cooling system, the radiator is the thing! I have changed the cambelt and thermostat (which is apparently worn out) and the top hose. It's all good now, i can keep driving my lovely car!!! Thanks for all of you and this forum!!! you guys rock! MERRY XMAS EVERYONE!