over heating td4.2 diesel

Post by **muddies** » Wed Dec 01, 2004 12:56 pm

I have a td4.2 turbo diesel, the temperature gauge goes to 3/4. is this normel or should i have it looked at. Im running 12 psi boost .it increase when driving up hill.

Post by **Daisy** » Wed Dec 01, 2004 2:42 pm

check..

thermostat,
radiator hoses
body lift in the way?
radiator (corroded)
aftermarket radiator since you have a turbo?
lowering boost
intercooler - to cool the air - as might help it from running hot.
changing type of coolant used
bleed the radiator? (heater on while running and bleeding)

They are just a 'few' of the things that run off my head.. will be a fair few more.

TOM

Post by **bogged** » Wed Dec 01, 2004 3:18 pm

Has the fuel pump been setup correctly for the turbo?

Remove the radiator adn hose it out internally AND externally, with a garden hose and it still in the car you only get 2/3rds of the core, the other 1/3rd is still blocked on the front with chit.

as said before above

Post by **bazzle** » Wed Dec 01, 2004 6:48 pm

Mine has always gone to 3/4 with the Turbo /Int.
Fuelling as Bruce says has an effect.
Ensure all clean, coolant and thermostat.

Bazzle

Post by **Mark2** » Wed Dec 01, 2004 7:17 pm

I'd be looking at your fan clutch. When they get on a bit they tend to only cut in at about 3/4, if at all. Apparently they can be refilled with silicon (available from Toyota in little vials), alternatively buy a new hub from Nissan.

When the fan cuts in properly you will hear it - they make noticably more noise.

Post by **Bingham** » Wed Dec 01, 2004 8:24 pm

Mine has no turbo and neither has my mate (a Mechanic) both over heat to 3/4 when up decent hills and particularly when towing as you would expect.

Mine we put in a new 3 core instead of standard 2 core full flush etc!
new thermostat and no difference..... then tried refilling viscous fan but ended up replacing and is a slight bit better but on recent trip to cruiser with camper on she ran very warm. After trip mud in radiator didnt help either. but clean no and still warms.

I have injector pump wound up my mate does not and mine gets slightly hotter than his.. we have addressed the obvious solutions but would like a more permanent solution,,,,

any miracle cures let me know

Bingham

Post by **Bartso** » Wed Dec 01, 2004 8:44 pm

look guys i reckon your 4by's are too hot my mate has one and it sits at one quarter all day doing anything offroad in traffic what eva still sits there

Post by **toughnut** » Wed Dec 01, 2004 10:36 pm

My GU ute sits below half way until I ask a bit more of it. Then it goes upto just over half. I'm going into comps next year so I'm piffing the standard and installing a PWR alloy radiator that bolts straight in without any mods and its 57mm thick. should do the job I hope. :cool:

Post by **bogged** » Thu Dec 02, 2004 7:49 am

Bartso wrote:look guys i reckon your 4by's are too hot my mate has one and it sits at one quarter all day doing anything offroad in traffic what eva still sits there

mine used to be exactly as you describe...

After taking it to Denco in Wagga, they sorted out more power, less engine temps, now sits on 1/4 most of the day, but long slow drags, it still gets up to 3/4 but thats to be expected...

Work it hard = more temp.

Post by **John H** » Thu Dec 02, 2004 11:10 am

My GQ has a turbo fitted running 12psi and no IC. It used to run at 3/4 when working hard — especially at freeway speeds. After getting sick of mucking around with fan shrouds and fan clutches, I bit the bullet and got a three core radiator made up. Now it runs at 1/4 all day long and at the worst it has gone up to about half way. The new radiator cost about $500 and I think it was well worth it.

Post by **bigbluemav** » Thu Dec 02, 2004 11:42 am

Whilst I am no diesel mechanic, this is my take on a possible cause.

Diesel are not like petrols. They get hot when running too rich, where petrols get too hot when running lean. Petrols get hot when revved to hard, and diesels get hot when they are forced to labour excessively for excessive periods, like climbing hills/ranges when towing.

Look at what trucks do....they pick a gear that suits the conditions and just cruise up, even if it's slower than we'd like. TD42 develop good torque at about 2000rpm. Find the right gear and sit it on 2000rpm.

Also, if you floor it at any point, you introduce a whole heap of fuel, which will encourage it overheating.

All points up for debate, but this is what I have found. I have a N.A. TD42 which had overheating issues. I installed some sheet metal, as per Bazzle's suggestion as I have a 2" body lift and bought a 3 core rad.

No more problems.

Regards

Post by **tuffzook** » Thu Dec 02, 2004 1:06 pm

Been there done that, the bottom hose sucks in under load !!!!
Get a falcon lower rad hose (EA -EB) 6 and take the spring out of it and put it in yours. Had a TD42 with 12psi with the same fault and it now runs 1/4 flat out towing a camper up hill :lol:

Try this out it works well . Also only use the genuine nissan thermostat

Post by **HeathGQ** » Thu Dec 02, 2004 2:47 pm

std diesel... mine sits on under 1/4 on the gauge. It go up about 1/2 once on fraser coming back towards Hook point on highish tide, so soft sand driving in the middle of the day. Have heard they are known for gauge problems... but would you risk it.

I'd say just as said above, go over all pipes and hoses, thermo, coolant, rad, etc, etc....

Post by **bundyrum4x4** » Fri Dec 03, 2004 10:32 am

I lifted the bonnet 30mm with spacers and it made a huge differance on the long hwy hills. The passing wind creats a vacum sucking the hot air out and drawing more air in through the radiator.

Doesn't look fancy but it works. If you notice, alot of comp rigs do this too.

Post by **Bingham** » Fri Dec 03, 2004 10:56 am

bundyrum4x4 wrote:I lifted the bonnet 30mm with spacers and it made a huge differance on the long hwy hills. The passing wind creats a vacum sucking the hot air out and drawing more air in through the radiator.

Doesn't look fancy but it works. If you notice, alot of comp rigs do this too.

send a pic if ya can! seems quite big 30mm must be like a wind sock/sail

but if it work nice
bingham

Post by **bundyrum4x4** » Fri Dec 03, 2004 2:57 pm

Bingham wrote:
bundyrum4x4 wrote:I lifted the bonnet 30mm with spacers and it made a huge differance on the long hwy hills. The passing wind creats a vacum sucking the hot air out and drawing more air in through the radiator.

Doesn't look fancy but it works. If you notice, alot of comp rigs do this too.

send a pic if ya can! seems quite big 30mm must be like a wind sock/sail

but if it work nice
bingham

All that is required is some 30mm spacers under the hinges with longer bolts. If you fine 30mm too big, simply trim them down further.

Havn't got pic atm, will try to get one tomorrow and send it to you

Post by **muddies** » Sat Dec 04, 2004 9:33 am

that might be worth atry.. i use to have a xu1 torana wich had the bonnet lifted at th windscreen end.

Post by **Bingham** » Mon Dec 13, 2004 2:41 pm

the comment regarding only using the nissan thermostat no aftermarket has just been seen in my mates and mine gets one tomorrow

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over heating td4.2 diesel

over heating td4.2 diesel

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