Howdy been looking around and can't find an answer to my question..

basically just put a new radiator in my ke70 (bog stock 4k), not blocked or anything like that.. started her up and all fine no leaks etc.

turned car off and opened the radiator cap after being running for about 20 seconds and there was a huge amount of air which came out when the cap came off. sort of like opening a soft drink if u cud imagine.. anyway thats the first thing.. didnt think much of it so started her up again and opened the oil cap to top up oil and there was air pumping out continuiously. havnt come across this before, so bad that i cudnt top up oil with it running without wearing it.. now are these two things (build up of pressure in radiator after being running for only 20secs and air pumping from oil hole) related and what is causing it?? water pump shagged?? not too sure, help is greatly appreciated, cheers guys!

cooling system pressurizing sounds like a head gasket to me

Yeah but could just have been air in the cooling system from having the rad out?

 

 

4k's naturally blow air out the oil cap lol

Yeah but could just have been air in the cooling system from having the rad out?

 

 

4k's naturally blow air out the oil cap lol

 

not head gasket, i only just put new one in. do they always blow air out oil cap do they?? jezz haha i don't remember my last ke doing that years ago.. so quite a bit?? coz as i said oil fricken went everywhere when i was putting it in while it was running hahaha. yea i was thinking that about having the rad out. cheers for that

:rolls: your topping up oil WHEN THE ENGINE IS RUNNING??

wait wait wait....

 

Topping up oil when its... Running.

That's how you do it, I'm going to do that with my new 5K, Going to start it up and then fill it with oil.

i always change my oil and filter when its running. battery isnt the best so i don't have a option

I think the Americans have a drive through service now

they always ask if you want cheese with that FML!

After putting the new radiator in, filling it and the coolant bottle

to the correct levels and the heater on the "hot" position so the valve

is open did you run the car for 15-20 mins with the rad cap off to bleed the

system of air?

 

Blow by will happen when the motor is running, best to do it while its off :y:

not head gasket, i only just put new one in. do they always blow air out oil cap do they??

 

Wait a second- have you driven the car since changing the head gasket? Or did you do the HG and the radiator at the same time.

 

Something sounds awry here; Pressurised crank case (ie air coming out oil cap) is likely because the rings are shot. The fact that your radiator and crank case are pressurised is suspicious.

i think in order to dignose:

 

1: bleed cooling system, park car up hill, open radiator cap, start car, let it run without a radiator cap for a good 15mins. it may overflow, but all the air should come out. give radiator hoses a few good squeezes, help the process along.

 

2: compression test on engine, make sure you have something decent, if one result is down, then you MAY have have blown gasket, if they are all the same go to 3.

 

3: put a small bit of oil down each cylinder. and repeat compression test. if it gets significantly better, your rings are on their way out. if it doesn't (and your original results were low, or one pot was significantly lower than rest), maybe you valve stem seels are on the way out.

 

I'm putting my money on you have air in you cooling system causing your presurised radiator (from when you changed it), and your rings or valve stem seals are on their way out, which is causing air out your oil cap.

 

or you did something dodgy on your HG changing, and its not sealing, which is causing it too put air through your oil galleries and your cooling system (bit rare to blow both though?)

 

my 4age actually changes idle speed when you remove oil cap, the rings are that stuffed, since it has the crank case breather going back to through the intake manifold. (ive done the valve stem seals). but its been going for 2yrs, and i expect it to go for another 3+

Edited June 20, 201115 yr by ke70dave

hmm... the question that no-one wanted to ask is..

 

Did you have the head skimmed when you changed the head gasket??

 

 

After you no doubt overheated the engine having blown the head gasket when the last radiator packed up on you, warping the head and over-heating the rings!

 

..or did you just fit a new gasket and let compression blow all the water out of the new radiator and the ruined rings blow all the compression out of the tappet cover??

 

Before you start Dave's excellent list above, leave the car overnight, take the rad cap off, fill to overflowing then start the car from over-night cold and idle it for 10minutes. Watch for bubbles coming out and pushing all the water out. If that happens before the water gets warm you have a leaking head gasket. If you have thrown the thermostat away because the motor was overheating that test won't work!

ill try a few things you have mentioned. thanks heaps for all the helpful replies. ill let you know how i go. doing my head in!

Edited June 20, 201115 yr by simon_van