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

Tiny
CHEZUNEE
  • MEMBER
  • 1996 HONDA CIVIC
  • 4 CYL
  • 2WD
  • MANUAL
  • 280,000 MILES
Hi guys, I have a problem with my car and no one can give me the answer.

If I go 50-60kms/hr, the temperature is fine
If I go 80-110kms/hr (motorway), the temperature is fine for sometimes (say 20min), then it will go up significantly if I keep driving at high speed and it will go to the red eventually.
But if I reduce the speed to 60kms, the temperature drop significantly.

Any idea why? Thanks in advance.
Do you
have the same problem?
Yes
No
Sunday, November 23rd, 2008 AT 8:11 PM

13 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
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.
Was this
answer
helpful?
Yes
No
Sunday, November 23rd, 2008 AT 10:08 PM
Tiny
F4I_GUY
  • EXPERT
Your radiator may just be weak at those high speeds. Is it the original radiator?
Was this
answer
helpful?
Yes
No
Monday, November 24th, 2008 AT 8:05 PM
Tiny
KHLOW2008
  • EXPERT
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.
Was this
answer
helpful?
Yes
No
Tuesday, November 25th, 2008 AT 7:49 AM
Tiny
CHEZUNEE
  • MEMBER
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!
Was this
answer
helpful?
Yes
No
Tuesday, November 25th, 2008 AT 4:20 PM
Tiny
F4I_GUY
  • EXPERT
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!
Was this
answer
helpful?
Yes
No
Tuesday, November 25th, 2008 AT 5:05 PM
Tiny
CHEZUNEE
  • MEMBER
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).
Was this
answer
helpful?
Yes
No
Sunday, November 30th, 2008 AT 4:07 AM
Tiny
CHEZUNEE
  • MEMBER
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! :(
Was this
answer
helpful?
Yes
No
Thursday, December 18th, 2008 AT 11:02 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
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.
Was this
answer
helpful?
Yes
No
Friday, December 19th, 2008 AT 12:25 AM
Tiny
CHEZUNEE
  • MEMBER
You guys are really champion! Thanks for your support! I will keep informing you guys. Wish me luck tomorrow! Cheers!
Was this
answer
helpful?
Yes
No
Friday, December 19th, 2008 AT 12:39 AM
Tiny
KHLOW2008
  • EXPERT
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
Was this
answer
helpful?
Yes
No
Friday, December 19th, 2008 AT 6:47 AM
Tiny
CHEZUNEE
  • MEMBER
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!
Was this
answer
helpful?
Yes
No
Friday, December 19th, 2008 AT 7:06 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
That is awesome news. Let us know how the trip goes.

Thanks for using 2carpros. Com!
Was this
answer
helpful?
Yes
No
Friday, December 19th, 2008 AT 9:56 PM
Tiny
CHEZUNEE
  • MEMBER
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!
Was this
answer
helpful?
Yes
No
Saturday, December 20th, 2008 AT 5:08 AM

Please login or register to post a reply.

Recommended Guides