I replaced the Thermostat, Radiator, all relays switches etc AND STLL RUNNING HOT!!
I have an 00 automatic Prelude that I cannot diagnose. I have changed the radiator and the thermostat and the car is still running hot. . I have also changed the temp sender, all the switches and relays etc I work at a toyota dealership and I had a master tech there do the radiator change is what he suggested after looking at the car and putting a temp laser all around the hoses radiator etc. The cooling system is not getting flow so he thought the radiator was clogged . But a new radiator did not do the trick. The tech said the only other thing he would think it could be would be the water pump impeller. He did say that it is highly unlikely and he has never seen it before. The car is showing no signs of head gasket failure either. My radiator fan is working but my ac fan is not. Can anyone out there help me solve this problem? To the person that successfully gives me a solution I get a discount at nearly all auto parts stores and will gladly return the favor.
It has 108k on it and the tranny is holding up just fine.
"Have you checked the temp with a mechanical gauge to ensure that your gauge is reading correctly?"
The tech used a laser that would tell the temp of whatever it is pointed at. He said that my radiator is ice cold and the top hose is at 180 degrees and rising . The coolant is not flowing for some reason.
As far as the head gasket leak. The car has no white smoke coming out at all and the oil is fine. It doesn't stall out or anything. I will see if the tech will do a compression test.
IF anyone has any other tips or guesses please let me know.
pierce seems to be right in my opinion. sounds like its a water pump problem. i have seen something like this before on a friends toyota pickup truck. your impellers fins have corroded away and now your not getting any type of flow because there is nothing(fins) to push the coolant. do you use pure anti freeze or do 50/50. ive also seen others like this when i had attended U.T.I. 5 years ago. oh and also a quick way to see if your head gasket is blown is to remove your radiator cap put the exhaust sniffer over your radiator neck and see if your getting any readings.
Last edited by MisledYouth bb6; 05-12-2010 at 01:19 PM.
Reason: blah
Yeah good suggestion. I will pick up one of those Head gasket tests they have at NAPA and check it out just to be sure. If it doesn't show a leak then I'll have to shell out some more $$ to get the water pump replaced and you have to take off the timing belt to do that so I might as well replace that too... ughh Thanks for the advice guys and if anyone can come up with a super-easy solution let me know Also I used 50/50 coolant from Napa
oh and it would be retarded not to change the timing belt at that point because if you dont youll pay for it later. and have to do almost all the same work. might even want to change out the self adjusting timing belt tensioner to a manual one. much safer...
After doing a leak down and pressure test I determined it was not a head gasket. I finally decided to go to the Honda Dealership and order the Genuine Honda Temperature sending unit. It was $45 and as soon as I replaced the aftermarket sending unit with the Genuine Honda part everything worked perfectly. All fans come on when they are supposed to and the car does not overheat at all. Just thought I would update this in case anyone runs into this same problem. If you're having weird cooling system issues, replace with genuine honda parts IE thermostat switches etc.
Originally Posted by Bullion View Post
.....as soon as I replaced the aftermarket sending unit with the Genuine Honda part everything worked perfectly......
could u take picture Genuine Honda Temperature sending unit
maybe i should change my too. my engine hot too. but no overheat. when i open the hood so hot. my fan,ac fan all work. but still hot.
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sounds like its a water pump problem. i have seen something like this before on a friends toyota pickup truck. your impellers fins have corroded away and now your not getting any type of flow because there is nothing(fins) to push the coolant. do you use pure anti freeze or do 50/50. ive also seen others like this when i had attended U.T.I.
5 years ago. oh and also a quick way to see if your head gasket is blown is to remove your radiator cap put the exhaust sniffer over your radiator neck and see if your getting any readings.
Also I used 50/50 coolant from Napa
C'mon man, diagnostics is still a good idea.
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