2lt overheating

[humuda]

Hi all, here we go. I have a Toyota Landcruiser LJ73 1987. It is a Swiss car in Spain, there was never a problem with overheating, just a lack of power. I did a compression test and that's were it all started! I removed the cylinder head and found 3 cylinders cracked between the valves, water system full of muck. I had the radiator overhauled with the ends off and rodded out, new thermostat - old one partially jammed open, new cylinder head, new piston rings, new head gasket, new timing belt. Put everything back together, car started brilliantly with more power, but when driving up any hill it overheats rapidly. There is no loss of water. On level ground it will run all day with no problems. The head gasket I bought was an after market, non-Toyota, and I noticed that some of the holes were blanked, so I bought a new head gasket from Toyota and it is exactly the same. Why are the holes blanked on the head gasket?

Please help,
Mat

 

[hybric4x4diesel]

Hi all, here we go. I have a Toyota Landcruiser LJ73 1987. It is a Swiss car in Spain, there was never a problem with overheating, just a lack of power. I did a compression test and that's were it all started! I removed the cylinder head and found 3 cylinders cracked between the valves, water system full of muck. I had the radiator overhauled with the ends off and rodded out, new thermostat - old one partially jammed open, new cylinder head, new piston rings, new head gasket, new timing belt. Put everything back together, car started brilliantly with more power, but when driving up any hill it overheats rapidly. There is no loss of water. On level ground it will run all day with no problems. The head gasket I bought was an after market, non-Toyota, and I noticed that some of the holes were blanked, so I bought a new head gasket from Toyota and it is exactly the same. Why are the holes blanked on the head gasket?

Please help,
Mat

first with ENGINE OFF try turn the viscous fan with your hand & feel how much resistence it feel. then open it up & it might take 5-6 silicon oil to fill. then put it back together & warm up the engine to normal temp. stop the engine & try turn the fan to feel the resistence. is it harder to turn or not?

 

[Radd Cruisers]

The aftermarket gaskets are generally Toyota units that are re-boxed.

Check your fan clutch for proper operation, or better yet, throw it away and put a new one on. I have them in stock if you want one sent to Spain...

Make sure your 2LTE is not over-fueling. Any black smoke out the back? If yes, then it's over-fueling and you need to look at the cause (Map sensor, injectors, ECM) and probably install a pyrometer.


~John

 

[humuda]

no fitted new fan, plus installed electric fan as well, removed the waterpump and was supprised to see engine block pump housing which was rough machining to block itsself with bottom bit missing . Any idea why not all holes are not punched out of head gasket

 

[humuda]

no smoke and engine is not te just 2lt cheers.

 

[humuda]

the fan is easier to turn when hot

 

[Radd Cruisers]

no fitted new fan, plus installed electric fan as well, removed the waterpump and was supprised to see engine block pump housing which was rough machining to block itsself with bottom bit missing . Any idea why not all holes are not punched out of head gasket

The holes are left intact to restrict the flow for adjusting the relative amount of cooling each cylinder gets. They are restricted for a reason, and it would not be advisable to open up holes thinking you are going to improve the situation.

Electric fans might look nice, and give you a good feeling, but they are garbage when compared to a properly working engine-driven fan.


~John

 

[Radd Cruisers]

the fan is easier to turn when hot

Install a new fan clutch unit, get a high quality unit.

~John

 

[lulo]

the fan is easier to turn when hot

Hey mate...

...if you FAN-Clutch don´t work well you need to do the next:


- YouTube - TOYOTA LAND CRUISER 90 coupling fan repair(refill oil silicone)



... or check my thread (page 2):

- https://forum.ih8mud.com/70-series-tech/251592-factory-diff-e-locker-lulo-lj-70-a-2.html

 

[Cruiser70]

Dont know why the gaskets are blanked, do you have the old to compare?
If this blocking a water channel then it could be bad news?

Aircon engaged when going up a hill?
Radiator been hosed out. no mud stuck in it?
Thermostat checked and cap?
Still overheat when blower/fan switch on the full heat?
air lock?

Of course you should back of the pedal and change down a gear to reduce the EGT's.

I have to remove the radiator and hose it for an hour or two every 6 months, once you have been in the mud/clay I experience your exact same symptons.

Check airflow, air filter, intake pipe, exhaust, likely culprits for poor airflow, which will higher the egt's.

Vaccum pipe on fuel pump sucking? think the 2lt has one, unless its electonic?

Could be over fueling as previously mentioned.

measure EGT's?

Keep is informed...

Hi all, here we go. I have a Toyota Landcruiser LJ73 1987. It is a Swiss car in Spain, there was never a problem with overheating, just a lack of power. I did a compression test and that's were it all started! I removed the cylinder head and found 3 cylinders cracked between the valves, water system full of muck. I had the radiator overhauled with the ends off and rodded out, new thermostat - old one partially jammed open, new cylinder head, new piston rings, new head gasket, new timing belt. Put everything back together, car started brilliantly with more power, but when driving up any hill it overheats rapidly. There is no loss of water. On level ground it will run all day with no problems. The head gasket I bought was an after market, non-Toyota, and I noticed that some of the holes were blanked, so I bought a new head gasket from Toyota and it is exactly the same. Why are the holes blanked on the head gasket?

Please help,
Mat

 

[humuda]

the head and block have 4 water holes 2for inlet and 2 for outlet, inlet holes 1 smaller other bigger, same for outlet.
on my toyota gasket the smaller holes are used with the larger being blanked by gasket. Toyota say there is only 1 part no for gasket for the whole of europe.

new 82 degree stat
new rad cap
additional electric fan
no A/C
rad ends off and cleaned

I live on a dirt track up a mountain 30 degree temp struggle after 300m incline but temp drops rapid when level ground or down hill

 

[Acik]

I have also the same problem with overheating, my first question is if there is any difference between the2L and 2LT radiator in a lj-70, i had a 2l engine and putted the turbo from a 2lt

 

[roscoFJ73]

I have also the same problem with overheating, my first question is if there is any difference between the2L and 2LT radiator in a lj-70, i had a 2l engine and putted the turbo from a 2lt

The radiators have different part numbers,but I do not know if they are the same size as far as volume goes.