Cooling the 1KZ motor

Having problems with your vehicle? Or need advice on repairing or servicing your Hilux? This is the place to ask for help
Post Reply
Thabogrobler
Monster Truck
Monster Truck
Posts: 5271
Joined: Sun Aug 19, 2007 10:43 pm
Town: Pretoria
Vehicle: '02 'Lux KZ
Real Name: Thabo
Club VHF Licence: x223
Location: Garsfontein
Contact:

Cooling the 1KZ motor

Post by Thabogrobler »

Found this usefull, expanatory article!

http://www.landcruiserclub.net/forums/s ... Z-TE-motor" onclick="window.open(this.href);return false;

http://www.toyotasurf.asn.au/forum/view ... hp?t=30503" onclick="window.open(this.href);return false;
'02 KZ 'Lux. Cooled. Chipped. Onca'd. Cherished!

If you are a diesel fan, raise your hand.
If you aren't raising your hand, raise your standards!

A 4x4 is merely a machine that enables you to get stuck further away from civilization.
User avatar
JJBotes
LR4WD, Lockers, Crawler Gears
LR4WD, Lockers, Crawler Gears
Posts: 1301
Joined: Tue Jan 04, 2011 7:19 pm
Town: Witbank
Vehicle: KZ-TE
Real Name: JJ

Re: Cooling the 1KZ motor

Post by JJBotes »

:think: :think:
:thumbup:
User avatar
JohanM
Monster Truck
Monster Truck
Posts: 4047
Joined: Tue Aug 14, 2007 8:33 pm
Town: Meyerton
Vehicle: Prado 120 4.0 V6
Real Name: Johan
Club VHF Licence: HC126
Location: Gauteng
Contact:

Re: Cooling the 1KZ motor

Post by JohanM »

As ek die ding so lees is dit duidelik dat hulle voel die termostaat is die culprit maar ook waar hy sit. Dit laat my nou tog wonder, want die 4Y enjin se termostaat sit ook daarso en tog gee hulle nie gekraakte heads nie en ook sukkel mens nie sommer met oorvehitting op hulle nie.

Dalk kan Allan ons hierso bietjie iets leer. :beg:
Johan Marais
User avatar
pietpetoors
Moderator
Moderator
Posts: 10650
Joined: Thu May 17, 2007 9:12 pm
Town: Langebaan
Vehicle: 2.7 Hilux 4x4 DC
Real Name: Pieter
Club VHF Licence: X27
Contact:

Re: Cooling the 1KZ motor

Post by pietpetoors »

If somebody have a obvious overheating problem, remove the thermostat completely and go and drive the same hill again. See if it is better. If it is better you know it is the thermostat.
My Oupa on the Plaas very often sommer chucked the thermostat out completely. The engine just takes longer to heat up, thats all. Normally in winter he used to put it back.
Only Dead Fish Go With The Flow!
Image
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
User avatar
Vlak vark
LR 4WD Full Lockers
LR 4WD Full Lockers
Posts: 757
Joined: Sun Nov 01, 2009 8:55 pm
Town: Phalaborwa
Vehicle: 1995 hilux D/c 4x4 Legend 25 Kzt with top mounted intercooler. long range tank. hankook dynapro duel battery system
Real Name: Nico

Re: Cooling the 1KZ motor

Post by Vlak vark »

Just remember that there is a 10mm hole behind the thermostat that must be closed by the thermostat. If not closed or blanked off the water will circilate mainly in the engin and not threw the radiator.
One life, one dream, one toyota
User avatar
pietpetoors
Moderator
Moderator
Posts: 10650
Joined: Thu May 17, 2007 9:12 pm
Town: Langebaan
Vehicle: 2.7 Hilux 4x4 DC
Real Name: Pieter
Club VHF Licence: X27
Contact:

Re: Cooling the 1KZ motor

Post by pietpetoors »

This can become a long discussion and somebody must please correct me if I am mistaken because we do not want to cause any damage to somebody's engine, but Vlak Vark, the waterpump's output pipe is about 30mm big and I guess it pumps water directly to the radiator. So if it have to go via a 10mm hole, most water will not rather go through the 10mm hole than the 30mm hole, it will go where the least resistance is and that will be the big hole.

Or is my reasoning wrong?
Only Dead Fish Go With The Flow!
Image
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
User avatar
Donkey
Monster Truck
Monster Truck
Posts: 5132
Joined: Fri Oct 30, 2009 12:33 am
Town: Johannesburg
Vehicle: 2002 3.0KZ-TE 4x4, Eazyawn RTT, Snorkel, NudgeM Bumper, 38mm Ball Joint Spacers, 35" Maxxis Bighorns, Dastek Unichip, 60 ltr Snomaster fridge/freezer, 40mm body lift, Mikem front/rear with extended shackles, Bilsteins shox rear
Real Name: Tumelo Thebe aka Baas John
Club VHF Licence: X122

Re: Cooling the 1KZ motor

Post by Donkey »

Very interesting read indeed, Thabo, and thanks for sharing. One thing I know I want to replace is the fan, only because I do not know it's age and effeciency, then see if the problem still persists, not that I think I'll know for sure since I won't be driving in the same conditions as we did in Namibia. Then also consider a 76 degree thermostat, but truth be told with our normal temperatures and driving I have no issues at all. Never a cracked head even and motor is sitting now on 328 000 km.

Do you think the small 5mm hole drilled on the thermos, would help? :think:
Tumelo Maketekete
Donkey, simple and often misunderstood.
We don't stop playing because we grow old, but we grow old because we stop playing!

2002 - 3.0KZ-TE Toyota Hilux (Letebele)
1994 - 1.6i Gl Toyota Corolla (Platkar)
1990 - Gli TwinCam 16v (ZuluBoy)

ImageImage
User avatar
pietpetoors
Moderator
Moderator
Posts: 10650
Joined: Thu May 17, 2007 9:12 pm
Town: Langebaan
Vehicle: 2.7 Hilux 4x4 DC
Real Name: Pieter
Club VHF Licence: X27
Contact:

Re: Cooling the 1KZ motor

Post by pietpetoors »

The hole in the thermostat some people do as safety measure when the thermostat gets stuck. That way it is not fully closed and some water can still go through
Only Dead Fish Go With The Flow!
Image
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
User avatar
The Legend
Monster Truck
Monster Truck
Posts: 3558
Joined: Sun Jul 04, 2010 6:53 am
Town: Kempton Park
Vehicle: 1994 2.2 4y 4x4 D/C Toyota Hi-Lux
Real Name: Dawie
Club VHF Licence: X93-

Re: Cooling the 1KZ motor

Post by The Legend »

Al wat ek kan se is dat n engine wat nie n termostaat in het nie , langer neem om sy werks temperatuur te bereik en dit veroorsaak meer slytasie op die engine.

Ek is glad nie n voorstander daarvan om n engine sonder n termostaat te ry nie.

Just my 2c
“A BAD DAYS FISHING IS BETTER THAN A GOOD DAYS WORK”

“Do what you do so well, that the people that see you do it, will want to see you do it again,and will bring others to see you do it”
Thabogrobler
Monster Truck
Monster Truck
Posts: 5271
Joined: Sun Aug 19, 2007 10:43 pm
Town: Pretoria
Vehicle: '02 'Lux KZ
Real Name: Thabo
Club VHF Licence: x223
Location: Garsfontein
Contact:

Re: Cooling the 1KZ motor

Post by Thabogrobler »

Lollie wrote:Al wat ek kan se is dat n engine wat nie n termostaat in het nie , langer neem om sy werks temperatuur te bereik en dit veroorsaak meer slytasie op die engine.

Ek is glad nie n voorstander daarvan om n engine sonder n termostaat te ry nie.

Just my 2c
+1
'02 KZ 'Lux. Cooled. Chipped. Onca'd. Cherished!

If you are a diesel fan, raise your hand.
If you aren't raising your hand, raise your standards!

A 4x4 is merely a machine that enables you to get stuck further away from civilization.
User avatar
Vlak vark
LR 4WD Full Lockers
LR 4WD Full Lockers
Posts: 757
Joined: Sun Nov 01, 2009 8:55 pm
Town: Phalaborwa
Vehicle: 1995 hilux D/c 4x4 Legend 25 Kzt with top mounted intercooler. long range tank. hankook dynapro duel battery system
Real Name: Nico

Re: Cooling the 1KZ motor

Post by Vlak vark »

Die water sal die kortste pad vat. Die water sal eerder sirkileer. As dit deur die verkoeler gaan moet dit al die pad op gaan tot die uitlaat punt wat hoer is as die 10mm gat. As jy n kraan n derde oopmaak het jy klaar vol volume. Daar sal we'll van die water sirkuleer maar die meese sal net in die motor sirkuleer.
One life, one dream, one toyota
User avatar
pietpetoors
Moderator
Moderator
Posts: 10650
Joined: Thu May 17, 2007 9:12 pm
Town: Langebaan
Vehicle: 2.7 Hilux 4x4 DC
Real Name: Pieter
Club VHF Licence: X27
Contact:

Re: Cooling the 1KZ motor

Post by pietpetoors »

OK dit maak sin ja. So dan lyk dit my om die termostaat uit te haal om te toets is nie 'n opsie nie
Only Dead Fish Go With The Flow!
Image
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
User avatar
Sun Chaser
Low Range 4WD
Low Range 4WD
Posts: 138
Joined: Wed Nov 12, 2008 5:37 pm
Town: Cape Town
Vehicle: '02Hilux Raider 3.0 KZTE 4x4. Jeep Grand Cherokee 3L V6 CRD Overland
Real Name: Ian

Re: Cooling the 1KZ motor

Post by Sun Chaser »

Very interesting reading, definitely food for thought.
ImageImageImageImageImage
Image
'02 Hilux 3.0KZTE
Iron Man Suspension
Air Ride Suspension
Alu Cab Canopy
Alu Cab Rooftop Tent
Dual battery Kit
6oL LRT
BFG 31x10.5 A/T


2014 Jeep Grand Cherokee 3L V6 CRD Overland
Mars
LR4WD, Lockers, Crawler Gears
LR4WD, Lockers, Crawler Gears
Posts: 1484
Joined: Mon May 07, 2012 12:33 pm
Town: Pretoria
Vehicle: Toyota Hilux Dakar 2.8 GD-6 DC 4X4
Real Name: Marnus
Location: Pretoria Oos
Contact:

Re: Cooling the 1KZ motor

Post by Mars »

As die koste van 'n termostaat opgeweeg word teen die koste van 'n nuwe enjin dan maak dit nie vir my sin om die ding nie bloot eenvoudig dadelik te vervang as mens vermoed hy is nie meer lekker nie. Ek vervang as 'n reel 'n voertuig se termostaat na so 5 tot 6 jaar.
Post Reply

Return to “The Workshop”