R34 - Waterpump/flow Issue. Car Overheats On Idle! :o

[illusiVe]

Hey guys.. couldnt find the tech help section.. so i figured this would be the best spot.. kinda..

I have an R34 GTT, recently i thought my water pump had died on me as i was getting no water flow through the top radiator hose, the top hose would be hot, the bottom hose would be cold.

So i took out the thermostat all together and tried again.. yet again no water flow.. so i got a hose stuck it in the bottom hose, water comes out the top no problem, vica versa still OK.

Swapped the water pump + thermostat on the weekend to an Rb30 item + Nismo thermostat, while at it i swapped my rad hoses to Silicon items aswell.. (mate told me my factory water pump still looked OK, it only had the slightest play in it, blades all ok)

Now by no means am I a mechanic, so i could be missing the most BASIC thing in the world. I've filled it up.. and yet again it seems like no flow. I idle the car for about 10 minutes and you can feel the pressure building in the hoses (as normal.. kinda..) and then the rad cap opens up to let the boiling water out of the overflow hose.. obviously at this point i turn the car off and let it cool down..

PLEEEEASE help me.. so confused and have no idea or reason i can think of as to why its overheating SO easily.

Also, if anyone knows, does ALL the water from the engine HAVE to pass through the turbo water lines, mine look abit small (Apexi turbo swap) and if it has to all go through the turbo i think that could POSSIBLY be the issue..

Edited July 23, 2009 by illusiVe

[QUICKY]

radiator? that could be the culprit. get it pressure tested or just swap it over with a mates one (if he has a car similar to urs) and see how u go

[gotRICE?]

Sounds like the Radiator is blocked. Actually, it seems obvious. If you have changed everything bar the radiator and its still doing it...

PS Nismo thermostat is only causing you more harm than good.

[illusiVe]

radiator seems to hold pressure no problems.. its only when the car is getting damn hot im getting steam outta the overflow hose.. at which point i know its too hot..

if it is the radiator it'd have to be a DAMN tiny hole.. cause i dont see any steam ever coming out of it itself, nor water

i can get water through the radiator no problems with just pouring water in the top pipe, it comes straight out the bottom pipe of the radiator.. imho it also wouldnt explain why i dont get water coming out of my top radiator hose =(

ill still doublecheck + swap the radiator tonite.

Edited July 23, 2009 by illusiVe

[James_03]

It's not going to be the turbo water lines.

Now what temp are you getting on the cluster? Is it actually moving off half way and towards hot? You might still have a bad radiator. Just because you put water in the top and it comes out the bottom doesn't indicate it's good unfortunately, the core can be flowing poorly and water will still flow out OK. Have you been running coolant in it?

I would remove the radiator and take it to a radiator place to be check and cleaned. Failing that you may need to look at a possible head gasket problem, of which the symtoms can be found on here by searching.

Get the rad properly checked out first but, re-fit it then move on from there.

[illusiVe]

thanks james.

yeh the temp cluster moves up towards high.. but in my 3 years of owning it until this issue happen'd i had never seen it go past half way. I have always ran coolant in the system, however since the issue im just throwing water in until i can fix these stupid gremlins.

Can you just throw me a basic reason/s as to why it could be headgasket related?.. just cant make sense from it.

[zebra]

its either going to be the radiator is blocked as has been said or there is a massive air lock and the system needs bleeding

[illusiVe]

how can i bleed this air pocket =)

like this? http://www.ehow.com/how_7369_burp-cars-cooling.html

Edited July 23, 2009 by illusiVe

[illusiVe]

after talking to a mate, apparently RB's have a bleed valve somewhere near the intake mani? (plz confirm) which u need to open to get all the air out...

i have no idea where this is or what it looks like (i know what an intake manifold is though!) if anyone knows or can pics me.. would be HUUUUUUGEly appreciated.

[gotRICE?]

THere is a brass bolt that says "dont open when hot" or something. Its right on top and the front. Cant miss it!

[illusiVe]

*Bows to master*

ill let you know how i go tonite =D

[lachlanw]

theres one at rear of intake manifold aswell . looks the same not too hard to find

[TriniGT]

There are two bleed points on the ER34 GTT, one ot the front of the intake mani and one to the rear. Fill the rad till either on fills and overflows then plug it and then the other and then top up the rad.

[illusiVe]

old thread but issue continues..

ill check for the second one tomorrow.. going to start from scratch

1)clean out engine water lines, thermostat+housing,waterpump+rad

2)redo thermostat + waterpump, wait for goop to sealup

3)bolt shit back together

4)fill rad with fresh coolant.

5)bleed system + test

anything else i may be missing?

[aphid]

curious to know how you went.. any luck?

[STATUS]

swap out to a new radiator its a pretty common issue.

[battery]

mate i got the exact same problem.

tried all the stuff you have....

i just keep a close eye on the temperature and if if gets too hot when im in traffic i just give it some revs to get the water flowing...

pretty lame but im to lazy to figure it out lol

[illusiVe]

had a water leak at the back of the block, having it fixed and new lines made up.

battery check yours =)

remember stock gauge doesnt go up until its PASSED a safe temperature for awhile..