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curculation problem
sheehy7474 - April 6th, 2006 at 08:43 PM

Could someone please help me. I have a ej22 moter in my kombi with the radiator behind the bullbar, but water just doesn!t cerculate properly. I have bled the system plus put a new thermostat in what am i doing wrong. help please.

Volkswagenboy - April 6th, 2006 at 08:45 PM

How's the waterpump?
-Staggers.

sheehy7474 - April 6th, 2006 at 08:47 PM

not sure how would i go about testing it.

kevo - April 6th, 2006 at 09:16 PM

well if you pull off the rad cap ( do this before you start the car when cold) and you cant see water moving in the radiator once the water temp has reached operating temp, then that is a sure sign the water pump is not pumping!

other reasons may be because you have a suction in the radiator pipes due to them being rubber perhaps??? i have heard of that happening on bullbar rad setups before

from the engine, how far do the coolant pipes get warm? if not far then again the water pump is rooted,

how long does it take to reach prime operating temp? bout 90 for those engines im guessing...

and least but not last... do you have an air bleed valve at the highest point in the engine bay? if you dont you will have maybe up to 3L of air in your engine and pipes, because when you fill up the coolant at the front the water is forcing the water up and if theres no where for it to go it will just bake up in your engine and your water pump may be spinning steam! therefore not pumping water!!!


goodluck

kevo

Volkswagenboy - April 6th, 2006 at 09:19 PM

Therefore overheating!
-Staggers.

boof2332 - April 6th, 2006 at 09:49 PM

The bleed is the key. I have a one way valve at the top of my radiator..when filling, you can quickly expell the trapped air....mine can overheat in a few minutes with an air lock.

Matt

GeorgeL - April 7th, 2006 at 12:51 AM

Quote:
Originally posted by sheehy7474
Could someone please help me. I have a ej22 moter in my kombi with the radiator behind the bullbar, but water just doesn!t cerculate properly. I have bled the system plus put a new thermostat in what am i doing wrong. help please.


Do you have the heater loop connected from the water outlet on top of the engine to the nipple on the thermostat housing? This is what opens the thermostat. Even if you don't have a heater you need to hook up this loop for the thermostat to open!

As others have said, bleeding is also key. You need a bleed valve on top of the radiator, park the bus nose-down, and bleed the air out of the radiator. Keep bleeding until all the air is out.

You have a header tank and overflow bottle near the engine, right? Without that, it's difficult to keep air out of the cooling system.

George

seagull - April 7th, 2006 at 01:43 AM

I made a fill pot for mine .I think Matt & jak have one of the units I made on there rides.
I have a line that runs to the rear it bleads as your filling it .

George is correct as my filler conects direct to the heater outlet on the thermostat.
Remember the water flows from the bottom up .

I have never had an issue.