Cooling problem with my ej22 kombi

chellejohno · 2014-09-26T10:50:38+00:00

Well guys, All went well with my suby conversion, kombi ran great, no cooling issues until I hooked my little caravan on! I can tow it around town at 60ks all day and have no issues but once on the highway at 80-90 ks the temp climbs up, even when the fans cut in it still keeps creeping up. Pulled the thermostat, all good, and pretty sure most of the airs out. I'm wondering if the airs not pushing down thru the radiators because I don't have negative air pressure in the engine bay? Also wondering if a small amount of air trapped in the very top of the radiator is going to make a difference, the only way I can see to fix that is to put a bleeder in the top of each radiator. Just seems strange it's overheating on the highway and not around town. Appreciate any feedback Cheers Johno

pete wood 23 Windows of Awesome

6,828 posts · joined Jan 2004 · 19 Oct 2014, 4:05 pm

#1002033

In fact, a thermostat will also slow the coolant down enough to cool it properly in the radiator(s).

Just to add an extra bit of thinking to your fine tuning...

Ricola (do a search to find his cabrio) did some serious testing and computer modelling re radiator scoops and ducting a few years ago. He discovered that to get your radiator working effectively, it needs a scoop that has a surface area of 40% of the radiator surface. Any less than that and it doesn't supply enough air. Additionally, that scoop has to be placed in a position where is gets laminar airflow. That is, uninterupted, smooth airflow like you'd expect at the front of a vehicle.

"stoopid is stronger than axles"
http://drivingnotpolishing.blogspot.com.au/

ian.mezz I never said, I could write or spell

3,913 posts · joined Sep 2004 · 20 Oct 2014, 6:21 pm

#1002096

cool running it wont hurt your motor that you got out of a $500 car with 200k 😊 is better then over heating and cooking your engine '
don't take the scoops off .
you can test your cooling system by driving around in 2nd or 3rd gear at high revs , eg 100kph in 3rd for a long time and see what the temp does .😊
vlad01 would know about getting heat into commodore by driving around in 2nd gear , as it was how you tested for a bad crank angle sensor . but the motor wouldn't over heat .

Dual flow 😊 radiators work good
This simply means the coolant passes through TWO times instead of ONE. Which, even more simply put means TWICE the cooling and half the size radiator

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