Hey
I was cleaning my IAC yesterday to my surprise i found rust around iac where the coolant flows it. Theres only alil bit thats actually inside the area but the surrounding area of that spot is pretty much rusted as my this pic shows. . .



Any idea why and should i replace my iac?

thanks in advance

 

You should flush your system and put in 50/50 coolants. More water in the system is what cause the rust.

 

should i clean up the rust or replace it as well? its only around the gasket area though

 

Yeah looks like you are running it with too much water mixed or no coolant at all. I wouldnt worry about replacing it because of that, id worry about everywhere else the coolant runs through looking the same (engine). Definitively flush it out asap. Seen a lot of probablems occur with just running water.. I have no idea why anyone would do that.

 

hmm, maybe I should go check mine.

 

Just another question related to this. If the coolant is too waterary will it affect the heater?? Cause my heater doesnt work but a/c does

 

your heater does not work because there is air in the heater core, it heats when the hot antifreeze is flowing through it. Youll need to be sure the system is 100% bled out. How old is the antifreeze in the car, the rusty color may be due to age, I have seen antifreeze that was never changed in a 10 year old car do that

 

sand down and clean the rust off the IAC and re-use the part.

You could have an air pocket in the cooling system, but if your anti-freeze is in really poor condition you could have a clogged heater core too - scale. Stick with Honda coolant it works really well even when left in the system too long.

 

Anyone try the "waterless" coolant, I believe it made by Evans? It's advertized as "lifetime" coolant & claims to run cooler due to the lack of water )lower boil point). Not cheap @ $35 per gallon but makes sense since you never have to replace coolant - ever.

AP

 

thanks for the hints guys
One more question with the cooling system. What parts should i check also for rust so i can remove it?
cheers really appreciate it