Preperation Required Rb30 Block For 3.2 Stroker Build

[luke gtr]

Taking less water, sounds more like an air lock.

Keep an eye on level and gauges, as you're doing, and you shouldn't have any problems (even if there is a slight leak).

[Nismo 3.2ish]

Taking less water, sounds more like an air lock.

Keep an eye on level and gauges, as you're doing, and you shouldn't have any problems (even if there is a slight leak).

Not sure if it is loosing less water, the time it seemed full after 50 klms I had opened it after about 5 minutes of driving it and it seemed OK, but the next morning it was down about 100ml, so it seems pretty constant There was good pressure in the radiator when it was hot.

Jim did not seem too worried about it and said to keep an eye on it. So now I have a couple of Lts in the car just in case and to keep it topped up. I do it now after it gets cold to get a true reading.

I think any air pockets would be long gone by now, but I think as long as the lose of water is constant over a given distance driven, seems to say it is not getting any worse "I hope"

Only have a couple of weeks before the final tune, this will give them a chance to test and find out where the water is going and fix it

[luke gtr]

Are you getting any puddles on the ground where it's parked?

[Nismo 3.2ish]

Nothing unusual, bit of aircon dribble .

100ml over 60 klms is reasonably slow considering it has pressure I think, but??

Wish it had green coolant, much easier to spot

[AngryRB]

Not sure on RB26, but on my 25, the turbo coolant feed line runs round the back between the head and firewall, that's a good spot to have a slow leak, maybe have a look in there.

[Nismo 3.2ish]

Not sure on RB26, but on my 25, the turbo coolant feed line runs round the back between the head and firewall, that's a good spot to have a slow leak, maybe have a look in there.

The only water I can find is ,I think from the aircaon and it is coming down where it always has before the build. It drips down at the back of the front wheel , in where the connection is to the exhaust where the pipe comes down from the motor when you stop the car, does not smell like radiator water and if it was leaking like that all the time the radiator would be empty after 100 or 200klm.

I think I can smell it coming through the aircon. There are no wet areas inside the car.

Only have a couple of weeks to go and they can find it, it is a wonder they did not see it while they were using it, maybe they did and that was why they told me to keep an eye on it to see what happened ??

[AngryRB]

my old man had a coolant lose in a commodore, using half a litre a week (500km's), it turn out to be a small, 8 mm hose at the back of the motor, was only a slow drip and wasn't evident because it was near the exhaust, so it burnt off as it dripped,( only one drop every 10seconds) just was thinking the turbo coolant line is that size and hidden at the firewall, so thought id suggest shining a light in there. the smell could be coming thru the firewall round there..

Edited March 24, 2015 by AngryRB

[luke gtr]

The only water I can find is ,I think from the aircaon and it is coming down where it always has before the build. It drips down at the back of the front wheel , in where the connection is to the exhaust where the pipe comes down from the motor when you stop the car, does not smell like radiator water and if it was leaking like that all the time the radiator would be empty after 100 or 200klm.

I think I can smell it coming through the aircon. There are no wet areas inside the car.

Only have a couple of weeks to go and they can find it, it is a wonder they did not see it while they were using it, maybe they did and that was why they told me to keep an eye on it to see what happened ??

the water from the ac is normal.

Ac removes the condensation in the air.

It is possible to have a leak in the heater core, that won't initially come out, but will after enough leaks into the system.

[Nismo 3.2ish]

You would think if it was loosing water under pressure it would still leave a puddle after the motor is turned off, but it may be similar to your old mans car.

After a drive tomorrow I will have a look before I turn it off.

I hope it is something simple and no need for anything drastic , but as there is no oil in the water and no water in the oil it should be OK

[luke gtr]

If going onto the exhaust, it would evaporate.

By the time the exhaust cools down, the cooling system has dropped pressure and stopped leaking.

[Nismo 3.2ish]

the water from the ac is normal.

Ac removes the condensation in the air.

It is possible to have a leak in the heater core, that won't initially come out, but will after enough leaks into the system.

Yeah water always comes out of the AC with the cold air on.

How much is enough before it comes out, has to be a couple of Lts missing by now

The only good thing about this, Jim is not worried. So I will worry for the both of us

[Nismo 3.2ish]

If going onto the exhaust, it would evaporate.

By the time the exhaust cools down, the cooling system has dropped pressure and stopped leaking.

the aircon water does not evaporate, but it only hits the pipe low down near the bend on the way down and warms up before hitting the ground

[XKLABA]

5-10 minutes after you shut the car off after a good drive is when you look for leaks on the ground as the pressure builds once the car is turned off and the coolant heats up due to it not moving through radiator

This happened to me when i put my motor back in and it was a hose clamp on one of the 8mm hoses under the brake booster wasn't on properly

[Nismo 3.2ish]

5-10 minutes after you shut the car off after a good drive is when you look for leaks on the ground as the pressure builds once the car is turned off and the coolant heats up due to it not moving through radiator

This happened to me when i put my motor back in and it was a hose clamp on one of the 8mm hoses under the brake booster wasn't on properly

I will give it a good going over today after my drive today, thanks

My major problem is my lack of knowledge about these cars, well car internals in general and my body being stuffed makes it difficult to get in and around them to search for things like this

When I was young you could get inside the engine bay and there were only mechanical problems, no computers etc, now you are lucky to get your arm in there, lol

But I will see what I can see

[KiwiRS4T]

Workshop can put a pressure tester on the cooling system and see if it is actually losing pressure - makes it easier to spot leaks if they exist.

[Nismo 3.2ish]

Workshop can put a pressure tester on the cooling system and see if it is actually losing pressure - makes it easier to spot leaks if they exist.

Yeah Bob , as they do not seem worried they will do it when I take it down in a couple of weeks, have the Klms up now for the final tune and I would rather that they do it and no one else can be blamed if shit happens.

I am keeping a very close eye on the oil and water while driving and after each drive and all good , well except for loosing water , LOL

[XKLABA]

Workshop can put a pressure tester on the cooling system and see if it is actually losing pressure - makes it easier to spot leaks if they exist.

That's how i found exactly where my leak was, i pressurised the system and bingo

[Nismo 3.2ish]

Just did 126 Klms, parked for 10 minutes and could not see anything leaking. Drove into the garage and apart from the aircon water there was one dribble about 2 foot in front of the aircon water, I think it could have been some of the aircon water that dropped after I drove off.

I let the car run for a while longer, turned it off again for a while and then moved the car out of the garage but other than the aircon water there was nothing, I thought I found it for a minute

When it cools down later I will see how much water it takes.

Got all of the Klms done for the tune, just a drive to Sydney away in 2 weeks and

[luke gtr]

Nice.

Try putting windows down and turning ac off 10mins before you know you'll be home.

She I understand stop the water from the ac coming into the equation.

[Nismo 3.2ish]

Nice.

Try putting windows down and turning ac off 10mins before you know you'll be home.

She I understand stop the water from the ac coming into the equation.

I did turn the aircon off once before to test it, but I had it on for a long time before that , so I will turn it off from the start and try again, love to find the leak.

Might leave it off for a couple of days just to be sure.