[dp87]

just want to know what the block temperature would be when the car is stationary? ive just started up my newly converted g16b sierra.

im using watchdog temperature alarm to monitor the temp of the block. it has a sensor that you bolt onto the block. i tried it and the temp got to 90 degrees Celsius so i shut the motor down. can it go further?

http://enginewatchdog.com/tm2.html

im still to connect the 1.3 sierra temp sensor into the coolant hoses to run the gauge in the dash. im waiting on an adaptor from ebay

[shandy92]

my thermostat opens at 82c, when i had a temp gun i looked everywhere but the block its self. 90c coolant temp isnt that bad but not the best, i would shut it off at 95-100c.

[whincup]

does anyone know what temperature red on the standard temp gauge is (assuming its accurate)?

[dp87]

i let the engine run again and the temp went up to 100 and seemed like it would still slowly go up so i shut it off

also i have a brand new 1.3l sierra radiator installed. water seems to be collecting at the bottom of it, where the metal fins end and the housing starts???

[losfer]

this device does not read coolant temp so is not an accurate device in determining if the engine is "overheating"

It reads surface temperatures of whatever it is bolted to.

considering the combustion temps can reach 2 thousand degrees in the cylinders , and headers/manifolds can reach a few hundred degrees , that heat has to go somewhere , it is dissipated through the block and cylinder head.

Another thing to note is that oil temps can get to 140 degrees easily. so 2000 degrees of combustion temps , 300 degree of header temp , 140 degree oil temp , with a cooling system at 90 degrees , do you think that the coolant will make the block cooler than 90 ?

[losfer]

whincup wrote:

does anyone know what temperature red on the standard temp gauge is (assuming its accurate)?

i would probably assume its over 105 degrees.

considering most cooling systems run between 89 and 95 degrees standard , usually anywhere between 1/3 and 1/2 on the gauge. and the boiling point is increased by 1 degree with every pound of pressure , so with a 9psi cap water boils at 109 degrees

[CairnsZook]

I wouldn't worry about it too much. Just wait until you get an accurate temp sender.
I doubt very much that a temp from the outside of the block would be close to what the gauge on the dash normally reads.

You can install the G16B temp gauge in your dash quite easily, that's what I did.
I also have an aftermarket gauge plumbed in to the top radiator hose. No idea what it reads though...
I'll try to remember to have a look for you tomorrow.

[joe5701]

also i have a brand new 1.3l sierra radiator installed. water seems to be collecting at the bottom of it, where the metal fins end and the housing starts???[/quote]

its leaking from somewhere if not the core maybe from the bottom of the top hose and running down. you should be able to follow the wet spot up the core to see it, if not it'll be leaking where the tubes meet the bottom plate.

[CairnsZook]

Oh yeah, the leaking part...

When I first started mine, I had the same thing. It turned out, the top radiator hose was leaking. My hose was a bit too big for the radiator. Make sure the hose clamp is done up tight enough.

[dp87]

ok so i got my adapter for the sierra temp sensor today and plumbed it into the coolant hose near the thermostat.

i also changed the location of the sensor for the digital temp gauge to the bolt on the thermostat cap.

i started the car and watched the temps.

the gauge in the dash started going up when the temp on the digital gauge read 80c.

after a while the needle on the dash gauge stayed right in the middle

at this point the the digital gauge was reading about 88c. so i guess it is somewhat accurate.

im pretty confident that its not overheating now





only problem is the radiator. i looked for leaks in hoses ect but couldn't find anything... i also left the car outside today hoping any spillage from filling the radiator last night would evaporate.

the water still seems to be collecting at the base of the fins. maybe its a fault radiator :S

[Jasen]

dp87 wrote:

...
only problem is the radiator. i looked for leaks in hoses ect but couldn't find anything... i also left the car outside today hoping any spillage from filling the radiator last night would evaporate.

the water still seems to be collecting at the base of the fins. maybe its a fault radiator :S

To be sure it's not spillage run some fresh water over it to get rid of any coolant pooling (even better if you can hit it with some compressed air afterwards - just not too close to the fins lol)). I thought I had a leak once till i realised i wasn't as careful as i thought i was when filling it

[alien]

check the cap is done up tight and that you dont have any pin holes in the rad hose that are squirting out coolant under pressure. it often is such a fine mist you cant see it squirting out, only where its landing.

[got_bar_work]

I got one of these and it did the same thing when I put it on my new motor
Have not worked out how to get it to work yet as the temp is way over 100 deg at operating temp and the alarm keeps going off

[skyman]

have you left the cap off after filling it, and let the thermostat open a couple of times?

sometimes air gets trapped in there and the thermostat won't open with hot air, it need water to open.

My routine; Fill it start it, run it for a minute maybe two. Shut it own, re-fill.

Leave cap off run it until it gets hot and starts spewing water, add water carefully while it is still running. Let the thermostat open a few time and then fill again and you should be good to go.

we call this burping a system.

I am lucky my driveway points up so i rarely get trapped air. Friends have had issues getting all the air out, and getting the system working correct.