1HZ problem......
Submitted: Saturday, Apr 14, 2007 at 10:14
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Member - Reiner G (QLD) 4124
On our last trip I noticed if I stop for 10min and take off again the temp gauge rises very close to the red mark but comes down to normal after maybe 5 min. I can travel for hrs and don't have a problem. If I stop for lets say 30min its all good but on a short stop it does heat up every time. Never noticed that before.
It has a new radiator and new waterpump. Thinking the thermostat could be faulty? but it shouldn't shut down on a 10min stop anyway.......
Any ideas out there?
Reiner
Reply By: disco driver - Saturday, Apr 14, 2007 at 12:07
Saturday, Apr 14, 2007 at 12:07
Hi All,
Back in the olden days when temperature guages were all capillary tube operated and not electronic gizmo's it was very common for the temp guage to rise after the motor was turned off, often into the red band.
Once you started again, the temp guage rapidly returned to normal
What actually happens is that the water temperature continued to rise for a while once the cooling fan and pump stop and because the guage continues to register, it indicates a rise in temperature.
In your case your guage is showing this increase of temp when you turn the key on after the 10 minute stop.
The reason that this does not happen when you have been stopped for a longer period is that the motor has had time to cool down.
I would watch it but there is no real reason to be concerned at this stage.
Hope this helps
Disco
AnswerID:
233309
Follow Up By: Member - Reiner G (QLD) 4124 - Saturday, Apr 14, 2007 at 12:33
Saturday, Apr 14, 2007 at 12:33
Thanks Disco that makes a lot of sense. At
home I wouldnt restart the car within 10 min so I would have never noticed. Otherwise the old cruiser run beautiful.
No I have to find something else to worry about :-)
Reiner
FollowupID:
494187
Reply By: Footloose - Saturday, Apr 14, 2007 at 19:18
Saturday, Apr 14, 2007 at 19:18
Ok, try going up a long steep
hill at speed. If it goes into the red, and then goes down when idling, its probably the viscous fan. Pick a
hill you could normally go up without overheating.
The fan unit can be carefully taken apart and re greased using the special Toyota grease (which isn't that expensive) or a changeover unit installed.
AnswerID:
233383