front mount intercooler cooking my engine

[PattyWgnOwen]

Ok, I will explain.
It is a 2000 GU2 wagon (ex zd30) auto with a silvertop td42t motor.
The radiator can't get any cool air because stacked in front are a full width a/c cooler, trans cooler, intercooler and p/s cooler.
I have a tiny little fan on the intercooler, but no room for anything bigger.
It gets very hot at traffic lights and on low range hill climbs.

I recored the radiator, and there is not enough space for a larger radiator, so that won't work.
I replaced the hub and fan with Gu turbo spec Nissan genuine and this has sorted the higher speed stuff but at low revs, does not do enough.

Unless somebody has any suggestions, I think my only option is to see if one of you blokes has a top mount that you want to trade with me. The diesel specialist suggested this, and I tend to agree.
My mate has a factory Gu td42t and his thermo goes off like a frog in a sock at idle, so I am guessing more air is what I need to keep everything cool?

love the auto, but seems to be causing me hassles?
Owen.

[Ben-e-boy]

gday

what kind of radiator do you have in it now??

how big is your front mount? could it be modified to become a top mount?

[macca86]

Hi mate to help with air flow still put a scoop on the engine bay and longer bolts with washers to pack up the back of the bonnet that will promote cool air in and hot air out even at low speeds. I would say the intercooler would help if you change to top mount too. Good luck

[PattyWgnOwen]

gday

what kind of radiator do you have in it now??

how big is your front mount? could it be modified to become a top mount?

I suppose I could mount it under teh factory bonnet scoop, but would that sort of defeat the purpose of a front mount water to air?
It is a fair bit bigger than the factory intercoolers and filled with glycol, so the weight might be an issue.

[PattyWgnOwen]

Hi mate to help with air flow still put a scoop on the engine bay and longer bolts with washers to pack up the back of the bonnet that will promote cool air in and hot air out even at low speeds. I would say the intercooler would help if you change to top mount too. Good luck

It has a scoop already from the zd30 I removed?
lifting the bonnet will help when moving, but may not do much when eth car is standing still - will give it a go i guess - can't hurt?

[MudRunnerTD]

I suppose I could mount it under teh factory bonnet scoop, but would that sort of defeat the purpose of a front mount water to air?
It is a fair bit bigger than the factory intercoolers and filled with glycol, so the weight might be an issue.

Hey Owen,You did not mention in your OP that is was a W/A cooler. Changes things a little. Is it a Frozen Boost system?

With your W/A setup you have a much freer hand to move and adapt. Sounds like you need bigger fans on the intercooler element for low speed stuff? even if you have to go the chop of the grill to fit them it will make a big difference. The W/A needs airflow like any intercooler and at low speed and stationary you have none and the Intercooler is just a lump of metal.

Mate if your engine is getting hot at idle then i'd be looking at your tune mate! No disrespect to your mechanic or for that matter you, but you have not indicated that your engine is a high spec engine?? All of which will need to be applied to this conversation.

As it goes though a TD42 will sit at Idle in any temp and NOT get hot!

Fit some fans to the cooler, fit a second scoop or a bigger double width scoop. Dial back you tune a bit. Or start looking at your engine.

Re the weight of the cooler

Here is a pic of my setup of WI, it has been like this for a couple of years on a car that gets driven hard when it gets driven.









You should have more room under your bonnet than a GQ i reckon. It was a PITA to make it work and fit but i am happy.

Think about some bigger fans mate, loose the grill. From what you have said in your post though its low speed stuff that i your problem, this is NOT air flow from restrictions its the state of tune loading up the boost and fuel and the ambient temp not being low enough to accommodate. Think about removing your front inner guards to allow side access to the engine bay for air flow.

Good luck mate

[97_gq_lwb]

I have seen these high flow water pumps advertised have to wonder if they would benefit you.

http://www.ebay.com.au/itm/Nissan-Pa...item519c131a08

[PattyWgnOwen]

Thansk guys,
I like the look of your bonnet mounted system, and the benefit is that it pushes air down through the engine bay. Your setup is probably what I need.
I think that my biggest problem is that in addition to what is normally in front of the radiator, i also have an auto cooler.
Gu td42 was not released in auto, so i am not sure what Nissan would do to remedy the problem.
My mate has a manual Gu factory td42t and he has a quite large therm fan and the GU also steps up the idle when the fan kicks in to about 1000 rpm.
Mine is a GQ with no electronics to the pump so mine stays at 650 rpm even with the a/c on.
My intercooler is a barrel type as per the denco standard setup, along with the denco high mount.
The high mount precludes the use of a full width top mount cooler - I have not found a decent top mount cooler that is designed for a high mount turbo?
I don't have any issues when driving so it must be airflow?

Does anyone know if the series three grill has any more space behind it?

[nissannewby]

Where abouts in brissy are ya bloke?

[PattyWgnOwen]

nundah by day, cashmere by night.
why?