troopie
06-07-2016, 06:06
Does any one know what a reasonable internal engine coolant temperature should be?
I have a factory Toyota gauge (ungraduated) in the front of the left hand head that never gets over half (I've had the gauge tested, it works fine) that lulls me into a false sense of security.
I also have a VDO mechanical gauge in the rear of the right hand head that scares the bejesus out of me!
On a hot day (that's every day when the sun's up where I live) it's often sitting at 90c (193.9F).
When I'm idling it will creep up near 110C (211.9F) if I let it (I try not to, I generally give it some herbs at traffic lights etc. to get the water and air flowing). I have no fan shroud yet; please don't judge me on this :o It was supposed to be made this week but has been delayed. :( This is a temporary problem hopefully to be rectified soon. My bigger concern is the figures in the previous paragraph.
Are these figures reasonable or bad. I'm worried I'm slowly cooking the poor old girl before I've even got the conversion finished. I've no idea what a good temp should be but to me water boils at 100C so it seems high. Yeah I know it wont boil 'cause it's pressurised but what's the healthy upper limit?
Now I know the old 6.5's were known for getting a bit hot at the back of the heads; does this explain the discrepancy? Does a healthy temp measured at the front of a head near the pump mean you are always going to get a higher reading at he back? If so how high can it safely go?
I also have a plan to plumb the rear water ports of the heads to the thermostat housing but that's another topic.:)
I have a factory Toyota gauge (ungraduated) in the front of the left hand head that never gets over half (I've had the gauge tested, it works fine) that lulls me into a false sense of security.
I also have a VDO mechanical gauge in the rear of the right hand head that scares the bejesus out of me!
On a hot day (that's every day when the sun's up where I live) it's often sitting at 90c (193.9F).
When I'm idling it will creep up near 110C (211.9F) if I let it (I try not to, I generally give it some herbs at traffic lights etc. to get the water and air flowing). I have no fan shroud yet; please don't judge me on this :o It was supposed to be made this week but has been delayed. :( This is a temporary problem hopefully to be rectified soon. My bigger concern is the figures in the previous paragraph.
Are these figures reasonable or bad. I'm worried I'm slowly cooking the poor old girl before I've even got the conversion finished. I've no idea what a good temp should be but to me water boils at 100C so it seems high. Yeah I know it wont boil 'cause it's pressurised but what's the healthy upper limit?
Now I know the old 6.5's were known for getting a bit hot at the back of the heads; does this explain the discrepancy? Does a healthy temp measured at the front of a head near the pump mean you are always going to get a higher reading at he back? If so how high can it safely go?
I also have a plan to plumb the rear water ports of the heads to the thermostat housing but that's another topic.:)