4k ksev keeps cooking after recent replacement of water pump but have no idea why anyone drove this road before? and yes has coolant

you need to burp the cooling system

 

Turn on your heater, take off your radiator cap, and start car, let it idle while watching temp.. the system should burp out any air bubbles which will cause it to overheat quickly.

if it still over heats after burping the system check the thermostat is functioning, mine stays super cold all the time and needs new thermostat, i guess it could cause the opposite effect too?

so that simple hey?? I'm sure i tried that when i filled her up again? so it just get air pockets n the pump wont pump as such??

the bubbles create little sections of the engine that arent getting coolant rushing past them so it keeps heating up.

the old commodore apparently had a massive problem with this because the engine was mounted higher than the radiator or something

dad went through several heads because the heat just cracked them

yeah i thought it might have been the thermostat staying closed due to lack of vacume? all my vacume lines are fairly f@$ked and there is two lines blocked that were off this lil plastic bit bellow the top hose?

thermostats are self sufficient, i don't know what those vacume hoses do.

just pull of the little bit of thermostat housing and check that the thermostat is moving freely, if it isnt then buy a new one.

Also flush the system. I changed water pump in my ke30, burbed it, still ran hot. Flushed it, much better now!

yeah have flushed it done that when i replaced the pump. will have to pull some stuff apart? so how does the thermo work then?

Just grab a brand new thermostat, that way you'll know it will be in working order

the bubbles create little sections of the engine that arent getting coolant rushing past them so it keeps heating up.

the old commodore apparently had a massive problem with this because the engine was mounted higher than the radiator or something

dad went through several heads because the heat just cracked them

VL ? The old VL was renowned for it

 

yeah have flushed it done that when i replaced the pump. will have to pull some stuff apart? so how does the thermo work then?

The thermo works by blocking the system till the coolant gets to a pre-set temp and opens up (done by a bit of wax or something). But it doesn't open all the way so that it can create a restriction in the coolant flow and in turn this restriction helps in drawing more heat away from the block and more so the head.

There would be to it but i didn't bother with a google.

 

How about the radiator ? Did you do the radiator ?

 

With flushing, i've always done it myself till the day that i did it and then went to a radiator shop and had it done there. It was an eye opening experience to just how much shut come from the motor.....

flushed it twice replaced the water pump and thermostat and it still cooking after 10 mins of driving any more idead

Did you flush it with the garden hose or did you have a radiator joint flush it for you?

garden hose whys that?

Garden hose would be lucky to remove a quarter of the crap in the coolant passages.

 

I'd also be doing a compression test on the motor to see if its blow the head gasket.

And check the timing as well

Whats the radiator like ? Could even have a stuffed hose or two.

 

In the earlier model cars, like yours, you'll be able to use the heater in the cabin (with the fan up high) as a secondary radiator.

 

But all in all if its not a blow head gasket nor the timing i'd be chasing up a radiator shop for some help.

It could even be as simple as needing a new cap for the radiator - water and coolant boil at a higher temp when under pressure.