Reducing Engine Bay Heat Caused By Turbo

[Jap_Muscle]

hey guys.....was a pretty hot day today in Melbourne and unfortunately had to run some errands in this heat.

after returning i noticed the extreme amount of heat the engine was emitting...to the point i started getting worried. water temps were as high as 95 degrees and oil almost hitting 90.

i have a Koyo radiator that i recently just put on and had no dramas until today. most of the heat is comming from the exhaust housing (top mount gt35r) and there is no heatsheild.

can anyone give me some tips as to how i might overcome these problems? some people have mentioned ceramic coating the front/dump pipes and the exhaust housing. atm ive only got some shonky heat wrap.

any help much appreciated guys.

[axe s]

ceramic coat the exhaust housing,

Put a beenie on it,

Heat prof pain on the exhaust, wrap it, and pain the wrap with the heat prof paint..

[hypergear]

or put a vented bonnet on. It also helps.

[paulr33]

its an engine bay, its still going to get hot no matter what you do

[BeEnAr]

My oil is usually at 90, today went a tiny bit over due to Aircon on but hardly ever seen it over 90. Last year on those 46-47 degree days it got to a bit over 120 but 90 is fine dude. The water temp is a little high though.

[PM-R33]

What kind of intercooler have you got? Is it a shit one that is blocking all airflow to the radiator?

[discopotato03]

I think properly made heat shields are the way to go , the heat insulation bags around the turbine housing are supposed to be good things too .

Ideally you want to keep the heat in the exhaust gas so it can do positive things for you , heat radiated into an engine bay does nothing for you .

A .

[R31Nismoid]

Driving around today, i didn't go past 75 degree's water temp. Every setup i've had has never gone above that either.

No heat shield is your issue, you are crazy to run around without one IMO.

[Moodles2]

Most radiator guides only refocus air above the radiator, will a full sized rad guide help at all with getting more air onto the exhaust manifold etc?

[some_cs_student]

No heat shield is your issue, you are crazy to run around without one IMO.

Hmm, what exactly is a heat shield? Are we talking about something custom designed for the car?

[Bond]

R31Nismoid How are you keeping your temps that low?

[r33cruiser]

nismo thermostat, good cooling system?

[R31Nismoid]

I just have a Race Radiators item, it was made for a R33, but we modded the mounts, fits perfectly into a HR31.

That is basically it.

I also use the factory RB26 heat shields, RB26 clutch fan with shroud etc etc.

None of this wanky thermo business, just how Nissan intended it with a good quality radiator.

I have 1x A/C condenser and a radiator sized intercooler directly infront of the radiator as well, so its not exactly getting fresh air either

And i wouldn't say i have a massive 'mouth' on my front bar either.

The RB26 does sit lower in a HR31 than a GTR though (ie top of the cam gears is level with my radiator top), but i doubt that is anything major in terms of reasons.

Hmm, what exactly is a heat shield? Are we talking about something custom designed for the car?

Being he has a high mount, yes it will be custom made for the exhaust housing.

Usually just a 180degree bend of stainless that bolts on. Not hard for a fabricator with half a brain.

[Bond]

Cheers,

I was having trouble with mine last summer but i never knew because the factory temp gauge didnt move much. It wasn't until the tuner plugged it into his pc and took it for a drive (diagnosing another problem) we noticeed it around 90 degrees). Since then i have played with the clutch fan and have noticed a lot more air being pulled through.....i just have to wait until its back on the road!!!!

James

PS: I also have a 4.2EFI patrol that is nearly identical in the engine bay minus the turbo. I plugged my consult thingy in and noticed when the factory gauge is on 1/4 its 84 degree (sits there on normal driving) and 1/2 is 89 degrees!!!

[noone]

Nismo thermostat worthwhile or not whats the general consensus

rebuilding my rb26 at the moment an wondering if its worth the extra dollars

2530's poncams etc etc was making 429 hp before it spun a bearing so big baffelled sump etc going in now

found with stock rad an nissan clutchfan etc it kept temps under control well before even on trackdays etc in Darwin heat!

Edited November 9, 2009 by noone

[talky]

while were having this talk .i thought id ask.can u run an aftermarket 50m radiator and still keep the clutch fan in place? and dose the 26 clutch fan make much of a diffrence?????

[NickR33]

Nismo thermostat worthwhile or not whats the general consensus

rebuilding my rb26 at the moment an wondering if its worth the extra dollars

2530's poncams etc etc was making 429 hp before it spun a bearing so big baffelled sump etc going in now

found with stock rad an nissan clutchfan etc it kept temps under control well before even on trackdays etc in Darwin heat!

I hated mine... made it almost impossible to get the car up to temp on cold Melbourne nights but you might not have that problem in Darwin!

90º water and oil is fine... no reason to stress out

[soulfire]

90º water and oil is fine... no reason to stress out

+1 ... but obviously don't thrash it on a day like today.

[G Dawg]

+1 Turbo blanket, cheap an effective

[noone]

while were having this talk .i thought id ask.can u run an aftermarket 50m radiator and still keep the clutch fan in place? and dose the 26 clutch fan make much of a diffrence?????

Cant answer your query regarding the 50mm rad though I am pretty sure they will fit okay

Nissan clutch fan and correct shroud was so so much better than thermofan on my 32

that plus an oil cooler and I really didnt have to worry bout temps on track even in Darwin temps