91 civic ex overheating

mauler001 · #1 11-07-2004, 09:56 PM

i have changed the head gasket , thermostat, fan sensors , and the car is still overheating almost immediately. i have no movement in the radiator and im not sure if air in the line could be causing problems. i have no heat when i run the heater either. any tips are apprciated on removing the air from the lines or what else the problem could even be.

TheSilentChamber · #2 11-07-2004, 10:07 PM

Water pump is dead.

4G4D Store · #3 11-07-2004, 10:12 PM

Ya, I'd say you going something going on with the water pump too - for some reason it's either not getting anything to pump, or not pumping what it's got.

honda_luvr_2000 · #4 11-07-2004, 10:47 PM

either the water pump is shot, or there is air in your system. air would cause overheating too, because the air will get trapped between the water and the thermostat, so it will never open to cycle the hot water out. try bleeding the system, before u tear everything apart to check out the water pump.

mauler001 · #5 11-08-2004, 05:32 AM

i just changed the water pump about 15k miles ago when i changed the timing belt. you think it could realy go bad that fast?
i forgot to mention too the car heats up unbeliveibly fast like within 1000 feet of moving the car from a cold engine, i have replaced the sensor for the gauge, but someone told me it might be the gauge itself.
im not even sure if it is really overheating, i am afraid to keep running the enigine in case it really is.

TheSilentChamber · #6 11-08-2004, 10:22 AM

shouldnt heat up that fast, something is wrong. Your gauge may be off. Trie bleeding the system though, heres a factory service manual : http://www.binghamtonlife.com/manual/2gsm/default.htm

mauler001 · #7 11-08-2004, 02:34 PM

ok i tried bleeding the system, but it seems like i could keep getting more air out but i cannt keep adding fluid because it sayd to leave the cap on. anyway the radiator definately has movement now and pressure since it shot everywhere when i took the cap off (the fluid was not very warm though either), but i still do not have fluid going into my heater core, i felt and tried sqeezing the hoses to the core and they are still cold and so is the air. the gauge is still reading hot too.

honda_luvr_2000 · #8 11-08-2004, 04:31 PM

Quote:

Originally Posted by mauler001

ok i tried bleeding the system, but it seems like i could keep getting more air out... ...i felt and tried sqeezing the hoses to the core and they are still cold and so is the air...

um, u need to have NO air in the system. if u have any, bleed it out no matter how much water u have to add to the radiator. u don't HAVE to have the car running to bleed it. also, make sure u rn't adding just water, but a 50/50 mix.
it is very unlikely for an engine to get as hot as quickly as u say it duz. sounds like the gauge might be messed up. have u checked the engine itself, when it says it's that hot, to see if it really is hot?

Figori · #9 11-08-2004, 05:13 PM

if there isn't water going into your heater core... Maybe you need to flush the system or backflush it?? Just my

. Do bleed ALL air out of the system, as well.. Regardless of how long it takes.

mauler001 · #10 11-11-2004, 05:39 PM

ahhh i tired bleeding the system several times and tried jacking the front end up too, sqeezed all the hoses to the radiator and the heater core to try to get the air out and the car is still overheating and all my hoses seem to be cold excpet the very top one with the bleeder valve is hot, they are only warm about half way up the hose. and no heat either, so im guessing still no fluid flowing correctly to the heater core. im going to check to see if my new thermostat is bad tomarrow even though its new.im not sure what to do im so irritated with the whole thing.
as for backflushing im not sure how to do that, i never have had to work on a cooling system this much ever.

TheSilentChamber · #11 11-11-2004, 06:36 PM

Your radiator might be plugged up.

FabricGATOR · #12 11-11-2004, 07:00 PM

Are you running the car with the heat on full hot?
Here's the point. I bought my Porsche at a good discount because it was overheating. I don't know Honda yet, but the 944 heater valve is vaccuum controled. Everybody who tried to fix that car missed that the heater valve was closed due to broken vaccuum hose. When I fixed the vaccuum and got the valve open AND BLED the entire system, heater core included. I had a nice car for a discount.

Just an easily overlooked situation.

Hope this helps!

mauler001 · #13 11-13-2004, 09:31 PM

ok so i finally got my friend to bring his laser thermometer to check the temp of the engine, and it is not over heating.
but now the question lies on why my gauge is still reading hot and why my heater isnt working, i hooked up a garden hose and put water pressure to the system to pump ouf all the air and bled it again. no heat , i took off the top heater core hose and fairly warm fluid came out. i put in more fluid, bled it again, no heat. fans run constantly after they first come on.
i need to know wgat to do if anyone knows.

and how to change the gauge in the dash, i changed the temp sensor so im thinking it has the be the gauge in the dash.

TheSilentChamber · #14 11-13-2004, 10:08 PM

You've got something stopped up somewhere, you need flush it, or your water pump is shot. If you need to replace the guage just replace the whole cluster. 88/89's are the same and 90/91's are the same. I have a 88 DX cluster I'll sell you for $20 plus shipping, I took it out when I got one with a tach.

2CrX · #15 11-13-2004, 10:51 PM

If you just replaced the water pump theres a slim chance that is the problem. Check the valve that controlls the heat. its under the hood in series with the coolant line going to the heater core. controlled by cable from the heater controls. I know this sounds stupid, but make sure the thermostat is in the wright way. never overlook the obvious

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