Max safe coolant temp HZ (non turbo)? (1 Viewer)

[woytovich]

What is the high end of the coolant operating range that would be considered safe/normal? Asked a different way: at what coolant temp would it be prudent to let the engine cool down (reduce load on engine in some way... stop, slow down etc)
I'm thinking of adding a warning alert light/buzzer and one unit I'm looking at is set to 235F (about 112C), another is 230F (110C)

 

[Westcoast78]

Sorry I can’t help but good idea to install a warning light/buzzer. When you figure it out, I’ll copy the idea.

 

[OGBeno]

AC cutoff is 226 if you have AC.

 

[Gun Runner 5]

My alarm is set at 220 degrees (F) …. ~104 (C)
I however have never seen temps above 203 (F) ….. 95 (C) …. with normal running around 181 (F) / 83 (C).
…… hope that helps.

 

[colby1979]

My warning alarm (Engine Guardian) beeps once at 200f and repeatedly at 210 I think, I've only hit the 200 alarm once on a long hill climb at 5500ft elevation on a 105 degree day.

 

[woytovich]

My alarm is set at 220 degrees (F) …. ~104 (C)
I however have never seen temps above 203 (F) ….. 95 (C) …. with normal running around 181 (F) / 83 (C).
…… hope that helps.

What alarm are you using?

 

[Gun Runner 5]

What alarm are you using?

My RedArc gauges have the option of an aural or visual warning. In my case the gauge will turn red.

 

[woytovich]

My RedArc gauges have the option of an aural or visual warning. In my case the gauge will turn red.

I already have a Speedhut temp gauge (without alarm) and I'm (likely) adding an alarm from Longacre.
Is your alarm/gauge on a 1HZ? Where/how did you tap in the sensor?

The Longacre has a 3/8 NPT sensor. I'm not really concerned with keeping the stock temp gauge hooked up although if it is easier to keep it I will.
I guess I'm asking the stock sensor thread size/pitch to be able to adapt the Longacre sensor.

Longacre

 

[Gun Runner 5]

I already have a Speedhut temp gauge (without alarm) and I'm (likely) adding an alarm from Longacre.
Is your alarm/gauge on a 1HZ? Where/how did you tap in the sensor?

The Longacre has a 3/8 NPT sensor. I'm not really concerned with keeping the stock temp gauge hooked up although if it is easier to keep it I will.
I guess I'm asking the stock sensor thread size/pitch to be able to adapt the Longacre sensor.

Longacre

P.M. sent

 

[coldtaco]

Engine Watchdog

 

[woytovich]

Engine Watchdog

This has a sensor that bolts to the block? It SEEMS that this would be slower to detect overheating than a sensor that sees actual coolant?... What is the thinking on this?

 

[coldtaco]

This has a sensor that bolts to the block? It SEEMS that this would be slower to detect overheating than a sensor that sees actual coolant?... What is the thinking on this?

The way I understand it the bolt method will read a rise in temps if you loose coolant. If you loose coolant before temps rise the temp gauge may never tell you of a rising temperature due to the temp probe is then reading air instead of water. This make sense? My observation is that the bolt reads temp rises almost as fast as the water temp sensor.

 

[woytovich]

Yes, that DOES make sense.
I saw this gizmo that purports to sense both ways...

 

[coldtaco]

Yes, that DOES make sense.
I saw this gizmo that purports to sense both ways...

That would be neat

 

[colby1979]

Yes, that DOES make sense.
I saw this gizmo that purports to sense both ways...

I run these gizmos on my HZJ75 and 85 SR5 and yes, the can be run both ways. On the HZJ75 I installed a 1HDT water outlet with the coolant temp sender port and fit the Engine Guardian with the direct water temp sensor. On the 85 PU I used the bolt on sensor attached to one of the three tstat housing bolts (its the wire with the black cable shield left of the rad hose, couldn't get a good pic).

 

[woytovich]

Can it be run with both at the same time? Monitoring both via coolant and a bolt? That seemed to be what I saw on their site.

 

[woytovich]

Do you know the thread and pitch of the HZJ75 port?

 

[colby1979]

I Think it can, when I purchased mine you could buy it with just the bolt on sensor or with both sensors, I've bought one of each at different times.

 

[colby1979]

Do you know the thread and pitch of the HZJ75 port?

Not off the top of my head, I do seem to remember having to buy an adapter but that's been a few years ago.

 

[woytovich]

I just ordered the dual unit.
If anyone knows the thread/pitch info I'd appreciate it. I'll report back when it's all installed. Fingers crossed.

I decided to give this a try over the Longacre unit because of the dual sensors. I will still use the Speedhut temp gauge to monitor coolant temp and this things will be used only for the alarm functions.