I got, an 03 Civic and the thing keeps overheating. I changed the Radiator,

new water pump, new thermostat, new rad cap, and FAN COMES ON. The

problem that im having is the motor is running too hot and the coolant keeps

backing up into the reservior and after bout a week of this, the car will

overheat. I know some bout cars but not everything. Im running out of

options and cant afford to take it to a mechanic at this time.


Note: Oil is clean no coolant in the oil.
****next ima try running it w/out a thermostat, wut else can i do?

 

Try reading through some of the other threads that talk about overheating, and see if thy help you at all.

 

Even though you do not see any coolant in the oil, or oil in the coolant, that does not necessarily mean the you do not have a blown head gasket. You might have fixed the original overheating issue by changing everything you changed but damage has been done. If you trust any of your local shops, they should have the equipment to test the head gasket.

 

before you even swapped all that stuff out, you should have had a leakdown test done. that would have told you whether or not the headgasket was leaking.

 

A leak down, might, show you if a car has a blown head gasket. It all depends on how bad the gasket is. Another test is to use a tool that can test whether or not there is Hydrocarbons in the coolant system. If there are, then you know for sure.

 

Check the head gasket and see if the air filters are full and need to change.

 

well, if the head gasket is leaking enough for the driver to notice a problem, then there is enough of a leak for the leakdown test to detect...on the other hand, compression tests are really crude and won't detect small leaks

 

you need to perform a leak down test as previously mentioned. if you have done everything listed above i'd say you have a bad head gasket.

 

If you dont see milkshakey oil inside oil cap/oil dipstick, you dont need to worry about a headgasket. True, it may not be an affirmative test, but there is no such thing. If you have a minor headgasket leak, it may not be noticeable with ANY test. BUT, head gasket will eventually get worse.....then it will cause more noticeable symptoms.

Bottom line, no milkshake, no problem (99% of the time). You probably need to look elsewhere........good luck, Bro!!

 

Wrong. Read through the numerous threads to see how many people had a bad head-gasket regardless of the fact that their oil and coolant never mixed together. It's quite common for our gasket to go bad without the "milkshake" symptom.

 

Ditto. Happened to me.

 

x2.

I just did my resurfaced my head and replaced the head gasket, and I had no coolant in my oil whatsoever.

 

Looks like a head gasket problem and check the head, you may need to resurfaced.

The coolant is overflow to the reservoir when the engine overheats or does it all the time, even with the engine cold?

 

I had an Accord show similar symptoms after replacing some of the same components the OP listed. It turned out the the replacement radiator cap (non OEM) was not doing its job effectively. Put a new OEM radiator cap on it, problem solved.

 

I have to agree with a previous post, I would suspect a head gasket. It sounds like you have ruled out just about everything else.

 

OK Guys, i ran it w/out the thermo still overheated. I did a compression test and CYL #1,2,3 all got 125 psi, and #4 135 psi factory specs are 135 psi so im good on dat. Did a pressure test and it holds pressure NO leaks. I also did the block test to check if there was a leak in the exhaust side and carbon was entering the cooling system. NOTHING passed as well. Funny thing is that i put the thermo back in, took it to the Mechanic and he couldnt find anything wrong w/ it. The thing didnt overheat on him

 

I drove it for a while the same day i took it to a mechanic (he found nothing wrong). The next day drove it 2 work and same thing happened again it overheated. it overheats after a couple of days driving it. I was thinking head gasket but all test pass. CAN THERE BE A TINY LEAK THAT CANT BE FOUND? Wuts left to do?

 

O and the thing warms up pretty fast w/ and w/out the thermo.

 

Wut is left to do on cooling system and Sensors other than coolant temp, fans work

 

If the factory specs are 135psi, then I think 125psi isnt good enough... Try taking it to a different mechanic to get a second opinion? Let it overheat a TINY bit before you do, then take him for a drive around the block to show him that it overheats. That way he knows there is a problem. Try to find a reputable place as well. Where is your coolant level at in your resevoir?

 

the factory specs will be a range of acceptable pressures...i never cared to look up the values for a d17...check the service manual

 

It probably won't overheat just little bit. Once it goes, it friggin goes. It'll get hot, then mid and fluctuate like that over an over no matter how you drive it.

 

It Fills up the Reservior and eventually comes out the plastic cap on the reservior

 

You definitely have a warped head. Gases from the exhaust side of your motor are leaking through and making its way into your coolant, causing it to be that high and spraying out into the motor bay..

 

that's one of the scariest things i've ever seen on h-t. cylinder head gaskets can be tested in a handful of ways like the ones listed that are all varying levels of accuracy. i wouldn't say you only need to perform on test and take the cylinder head off, test and verify with another test. basically what i'm getting at is triangulate on the issue. 2 or 3 tests are a lot more accurate than one test. verification will save you time and money as oppose to shooting in the dark. some of the best cylinder head gasket information with be found in the older forums 88-91 and 92-2000 being as they are so common to have head gasket problems. use the site beyond this year range because popularity and information lies in the earlier models.