Hmmm, sounds like the extra heat is coming from the auto then. Don't like the idea of holding in drive for THAT long. Mine will certainly idle in park for as long as I like, have done it many times while the missus is shopping. It's only when over idle, ie 2000rpm that the fan seems to slow and temps rise.
Cheers,
Alan.

It is the auto pushing the engine temp up... due to the torque converter - when doing that the auto sits about 3 degrees or so higher than the thermostat on the engine...

I am curious if all 80's do it though.... because 10 minutes in drive stopped or low speed is simulating stop start traffic which is how I origianly noticed it.

The Engine Watchdog is a great addition in my opinion. Had mine on for 6 months now, and am used to it's readings. I have the probe bolted onto the head and it generally displays 10 degrees cooler than my mechanical water temp gauge. Sitting at idle though, due to lack of airlow, it will gradually climb to the water's temp. The stock toyo temperature guage is absolute crap. My mech gauge is just moving above 40 degrees when the stock is already sitting at it's normal position! On the 1FZ cruisers i'd recommend an aftermarket gauge at minimum.....it sure beats warping your head!

Hi Alan,

In response to your post in that other thread:



What model cruiser do you have ie. year/petrol or deisel?

I will try raising my revs to 2000 in idle in Park when I get home tonight but I am pretty sure my temp will go up like yours as per your previous post.

I believe this is more of an issue of heat getting OUT of the engine bat rather than the fan not running as fast - but I will check - is there a particular reason you think the clutch is not spinning the fan as fast when you rev it up or is this just because the temp went up?

86 degree's C alarmed me when I fist looked at the temps on mine - mine (93 1FZ-FE) does this around town without towing - in fact - on a warm day in a bit of stop start traffic - ie. sit at the lights for 5 minutes after it is already running at 82-84 degree's C with the air con turned on and it will go right up into the 90's and high ninties if left in stopped in say a turning lane in traffic for say 10 minutes.

What seems to cause this is that the auto oil cooling goes via the radiator. It was designed this way to use the engine to help the auto get up to temp faster which is improtant. The down side is that when the Torque converter heats up because you are stopped in DRIVE, it actualy starts heating up the engine cooling system. If you whack it in N or turn off the Air Con or start moving them temp will come down within a minute.

I know this iks what is happening because I have temp gauges on my auto oil line and can see what is going on.

86 degree's C is actualy still inside the "normal operating temp" of the 1FZ-FE according to the FSM.

When I saw the temps behave like this - I thought there was something wrong with the cooling system too - I had already replaced the FAN clutch as PM 3 months before hand - so assume that is okay - all heater hoses including the PHH were replaced at the same time and the cooling system was flushed.

So I went and replaced my Radiator - It was over 13 years old and original. I took the opportunity to go from Brass with Plastic tanks to Brass with Brass Tanks but saw NO CHANGE in the temps.

I do believe - but not 100% sure that the Original Fan clutch is refillable - the Blue one is adjustable though and apparently technically a better design.

Toyota are the ONLY place that carries the special fluid - make sure you get 10,000 CST(this is the thickness)

If you replace the FAN Clutch - I would not buy anything less than the OEM one.

Given the age of it - I would just go to a NEW Toyota BLUE one rather than try to revive the original one...

I can't remember the price - but it was a few hundred *I THINK*

You could install it pretty easily - there isn't much to it.

I am curious to know if:

1. What model cruiser petrol/diesel and year?
2. Sit in Drive Stopped with foot on the pedal and air con turned on for 5 minutes or so after t is already in the 80's and see how it handles the temp - ie. what temps you get
3. Is there any other reason other than the temp that you think your fan clutch is a problem?

I only got back from fraser last sat, and the whole week my truck kept going to 3/4, 3 times it sat under the red! Im pretty mechanically minded and know when something isnt right but as it says in the manual 3/4 is still in normal range, im depressed now, cause there is oil and tiny little oil bubbles comming out from between the head and the block, still runs sweet though

Back in december, mum was driving her 1hdt cruiser home from the sunny coast, and it split the heater hose. Being female, not being sexist its a general statement that most females arnt as mechanical aware as males and unless its the speedo or a light or buzzer they generally wont check all engine gauges all the time.

Any way, mum was comming down the bruce highway and all of a sudden it started bellowing black smoke out the guards, bonnet and from under the dash. so she looked down and noticed the oil pressure gauge on the bottom and the temp guage was pointing straight up. so she pulled up and with nothing to do she had to turn it off. It didnt matter it was all over red rover!

This is what a 1hdt looks like after its got so hot the sump oil has practically caught fire!


^ Cylinder number 4


^ Cylinder Number 5


^ Started scraping off the melted alloy from the top of number 5, before thinkin i should take a pic.


^ Started melting the tappet cover!!!


^ Cylinders 4 & 5 are the worst, 3 and 6 have started melting the edges of the pistons and are a bit warped.

Started melting 4 & 5, practically melted the turbo, burnt the paint off the block on the intake side, melted the tappet cover we had to chip away at the plastic to get to the bolt heads, it spat 4 valve washer things out, few vacuum lines etc were melted, had to use multi-grips to remove oil cap, etc etc IT WAS HOT!!!!!

yet the thing still cranked and had compression on 2 cylinders, These motor are hell tough!!!!!

Ouch, thats gotta hurt! You've got some carnage on your hands there mate. Hope your mum's 80 is back on the road soon!

I'd call that the majority of drivers on the roads arnt mechanically aware of gauges etc.. Thats why idiot lights and temp gauges that are dulled to the point of not moving until its miles to late.

The motor had done 370k but was rebuilt at 208k as it dropped #5 big end bearing. The motor was a throw away as the bore had been honed 40 thou and the crank was ground to the limit, so we sold it as is with the blown motor and bought another truck, looked at buying a turbo 100, but didnt like the IFS even looked a new 200. But in the end we couldnt look past another 80. So bought a 97 Multi-valve turbo (1hd-ft)

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Sorry about the Hi-jack!!!!!

Is there a link to that ih8mud thread about the temp guage?

Which mud thread?

Troy - that story re your mum is exactly why those TM-2's are a great investment - who ever is driving - including myself (let's face it - the temp of a ny car can move very fast once the cooling system fails) can be alertted by the loud alarm on them and you get more notice because it doesn't have that "DEAD SPOT" that the OEM gauge on the dash has!

The one about the temp guage mod, had a quick scan through and cant find it but yeah im sure you guys were referring to a temp guage mod and something about resistors. Maybe im insane

Yep, here it is I8mud temp gauge mod

Not to sure if it will work out the same as the petrols on the diesel models. Im not 100% sure if the gauge electricals are the same between the two

Ahhh - that one!

I haven't been able to get a source for the correct diodes here in Australia - then I decided not to bother for three reasons.

1. It's a big job and the thought of pulling the instrument cluster looks like a PIA
2. The OEM Gauge - even modded, whilst it will move without the dead spot which would be a big plus still doesn't actualy tell you what the temp is...
3. The TM2 was a real easy install, gives the temp exactly and you can measure it from where ever you want and most importantly - has an ALARM if I forget to look at it

Yeah will order 2 off you in the next week or two one for my truck and one for mums, do you accept cash and pick-up as im in brizzy?