Fitting TM4 and Coolant Alarm to 2L petrol
Posted: Sun Aug 06, 2017 11:20 am
I've got the TM4 engine monitor and coolant alarm fitted to my 2L petrol.
All pretty straight forward. Scary part was drilling into the header tank to fit the screw "sensor". Got wetter than expected
I waited a few weeks after changing the coolant as I'd read on this forum that you get false alarms if you fit it with brand new red coolant.
The only other challenge was finding somewhere on the engine to fit the TM4's temperature thermistor. Lot's of knowledge out there for the diesel, not so for the petrol!
Here are some pics:
Header tank screw. The wire is fed back into the cab via the existing wiring seal behind the header tank.
TM4 temperature sensor mounted on the engine. The wire feeds back via the existing wiring loom grommet on drivers side:
Module in place in the large cubby in front of the gear shifter. This still leaves plenty of room in the cubby for storage. I had to (carefully) drill a hole for the wire and used a rubber gasket. Oops, pencil centre mark still there
The engine temperature read out seems accurate. Typically shows 88-90 when running, which is the thermostat operating temp (handy for spotting if it sticks again!). Fan kicks in precisely at 92 degrees. Never see it go above 94 so far, even in standstill traffic. Alarm threshold is set to 100 degrees.
I like the way it automatically lights up in low light with a nice gentle glow.
The only thing that is a little annoying is the coolant alarm part goes off very loudly for about 4 seconds every time I start the engine. It peters out with a plaintive squeal and stops. Is this normal?
It's also very loud. I might open it up and insert a resistor on the buzzer to drop the volume a bit.
Hope 2L owners find this useful.
All pretty straight forward. Scary part was drilling into the header tank to fit the screw "sensor". Got wetter than expected
I waited a few weeks after changing the coolant as I'd read on this forum that you get false alarms if you fit it with brand new red coolant.The only other challenge was finding somewhere on the engine to fit the TM4's temperature thermistor. Lot's of knowledge out there for the diesel, not so for the petrol!
Here are some pics:
Header tank screw. The wire is fed back into the cab via the existing wiring seal behind the header tank.
TM4 temperature sensor mounted on the engine. The wire feeds back via the existing wiring loom grommet on drivers side:
Module in place in the large cubby in front of the gear shifter. This still leaves plenty of room in the cubby for storage. I had to (carefully) drill a hole for the wire and used a rubber gasket. Oops, pencil centre mark still there
The engine temperature read out seems accurate. Typically shows 88-90 when running, which is the thermostat operating temp (handy for spotting if it sticks again!). Fan kicks in precisely at 92 degrees. Never see it go above 94 so far, even in standstill traffic. Alarm threshold is set to 100 degrees.
I like the way it automatically lights up in low light with a nice gentle glow.
The only thing that is a little annoying is the coolant alarm part goes off very loudly for about 4 seconds every time I start the engine. It peters out with a plaintive squeal and stops. Is this normal?
It's also very loud. I might open it up and insert a resistor on the buzzer to drop the volume a bit.
Hope 2L owners find this useful.
