Having a very strange issue , I can drive the car around town at 188-190 ( going by the tunerveiw) But as soon as I get on the highway temps will get up to 210- and start going up. This is not under boost this is just easy cruising on the highway. Heres a run down on the set-up.

Koyo Rad
Heat wrapped Downpipe and Dumptube
Peakboost Ramhorn (jet coated)
FAL Fan wired in through the Hondata S300

I recently Switched over to 80% Water , 10% Anti Freeze, And 1 Bottle of water wetter, This did nothing really .

Could this be a strange thermostat issue ? Bottom hose is hot , Im almost Positive I have all air bled out of the system. Intercooler is pretty big and covering some of the radiator but im not sure that is the issue.

Any ideas guys? This problem never happend untill summer time came along .

Thanks guys

 

verify your thermostat is working properly, if the driver side is open for air to flow through the radiator will not get enough airflow and it will not cooler on the highway. What chassis is this in? I've delt with cooling issues in several chassis. Ill help you out just give me more info and ill walk you through it. You'll get a bunch of people telling you to throw money at it and everything you have is garbage and need to redo it all but work with me and ill work with you to figure it out. You may have to change parts but lets diagnose it first.

 

I agree. Given the details of what you have it does sound like a classic airflow issue, but check the basics first.

 

Thanks man , i appreciate any help I can get . Car is a 92 civic hatchback

 

Going to do a oem Tstat this weekend just to rule that out

 

I'm thinking more of the fact that its water, and the FAL fan. At these temps distilled water's boiling points just don't transfer heat from the engine block very well.

I don't get over 195 with the same radiator, SPAL 13" fan, Garrett 24 x 12 x 3.5 intercooler and OEM Thermostat. But my mixture is 70% OEM Honda coolant, 20% distilled water, and 10% water wetter.

Try the mixture and Fan first, as well as thermostat.

 

Thanks for all the great info . My brother has been telling me to go with the Spal fan . Few questions , would you first try the new mixture and a oem thermostat and see how that goes ... Or 100% ditch the FAL for the Spal fan ? Thanks man

 

Hmmm, I'm gonna have to disagree with this for the following reasons:

Distilled water mixed with low amounts of antifreeze and a bottle of water wetter will transfer heat very effectively.

He recently switched out to the combination above and no changes were noted.

Gentle highway cruising should at no times require a fan. The cooling systems load under these conditions are not significantly higher then a stock car.


With these things in mind this is the action I would take:

Thermostat old or questionable? Replace it with oem.

Air definitely removed from system? Raise radiator cap to high location and cycle thermostat open for 5-10 min with cap off.

Cap holding pressure correctly? If its not the overflow tank will fill abnormally. Check or replace the cap.

Large intercooler blocking the airflow path to the radiator? The radiator core may be subject to stagnant air. Guide some through. TurboLS had good suggestions.

 

 

spal fan on a relay with a good fan shroud.
i noticed a difference on mine.
if all else fails you can prob get a mezier electric water pump kit.
http://www.meziere.com/ps-1332-1268-wpk50022.aspx

 

here comes the just turn your fan on and let it constantly run posts. the car should NOT need a fan running all the time to stay cool. it should modulate depending on driving conditions IE driving stay off idle and slow speeds shouldnt need the fan.

 

Thanks man Im going to be getting a OEM Tstat in this weekend and can report back then

 

Shodan I actually have that exact same funnel tool , Very convenient to use. Im going to start with the thermostat to eliminate that since it's the cheapest thing first, Is there any truth to people saying sleeved blocks are hard to get air bubbles out of? I was almost sure I had the car bled good, I couldnt get anymore bubbles to come out...

 

Do you have any tips on how to get more air flow to the intercooler it's self?

 

Here is a picture of the intercooler ( I know its not the best picture )

Also a picture of the turbo set-up prior to heat wrapping the dumptube

 

Nope. No truth in that Sleeved blocks are more difficult to remove air from the coolant system.

 

Is the manifold wrapped or just dump tube ? I would wrap that dump tube twice it's close. You need to
Block off the driver side next to the radiator air will also flow path of least resistance so blocking that off forces air to the radiator. If there is an air gap on the bottom of the car between the intercooler and radiator close that up too