Weird cooling issue

[BrokenAccord]

Hey everyone,

I am no noob to working on my cars, but I do have a question. I recently replaced my motor and did a cooling system flush, to which a bunch of nasty stuff came out.. I drove the car maybe a mile and a half before doing the cooling flush and changing the radiator. Well, I took it for its maiden voyage today from my house and made about a 25 min drive... well I noticed when at a red light, the temp gauge would go up towards the H and then when taking off and getting up to speed it would dip down to the C and then stay in the middle as I am driving.. What would cause this. My belief is that the Thermostat that I had just replaced has either A. Gone Bad, B. Clogged and needs cleaning, or C. is something totally unrelated.. If anyone can help, it will be much appreciated!

Thanks

Ian

[91kid]

If there was a bunch of gunk the first time... Id say you loosened up more gunk this time...

[BrokenAccord]

If there was a bunch of gunk the first time... Id say you loosened up more gunk this time...

when I flushed the radiator, I did it a few times with a radiator flush kit and solution that I picked up at honda, they said to use it. when everything was said and done, it was clean and good to go...

[91kid]

Did you flush out the block?

[carcollectorkid]

hope you figured it all out?

[BrokenAccord]

yeah I did flush the block, the car was ran three times over a series of a few hours at 20 min incriments to flush the block as recommended by honda

[91kid]

Hmmm... all your temp sensors are plugged in good right??

[BrokenAccord]

ya they are.. I went and bought a new thermostat today, and have to go to honda to get more coolant

[cb7_ex_coupe]

head gasket???

[foamypirate]

head gasket???

Possible, but not likely.


Sounds to me like your fans aren't kicking on. You should inspect them and make sure all the relays/wiring/motors are good.

[BrokenAccord]

I am only using 1 fan.. its on the passenger side of the car, I was told that was the one that I needed. it kicks in when the car turns off... kinda makes me wonder

[OldMan'92Accord]

don't forget to bleed the air out of the cooling system. there is a bleed screw on the thermostat housing. run the engine with the bleed screw open slightly to let the air out of the system. when the coolent bomes out in a steady stream, close the bleed screw. good luck

[Shag Wagon]

Your fan is not the issue. Mine hasnt come on at all this winter and im sure since you are up north its not a problem for you. It sounds like you may be needing a water pump because its not flowing like it should. If you flushed all that gunk out then there is a chance that you have some gunk on the wheel. I know you are going to hate it but thats your next step. Also try it with the thermostat out. How good is your radiator?

[BrokenAccord]

radiator is BRAND NEW

[phalpin]

I have had the same problem with my cb it turned out to be low on coolant. Is there good heat in the car?