cmedsailor
Well-known member
I would like to add a coolant temperature gauge for my Volvo D2-75 engine. Anybody has a picture or a clear diagram of the position that the sensor is installed?
Adding coolant temperature gauge- Volvo Penta D2-75
- Thread starter cmedsailor
- Start date
Beneteau381
Well-known member
The D2 55 is on the port side in front of the starter iirc, I have a pic somewhere, also the thread size, will look tomoz
jamie N
Well-known member
I don't know your engine, but I fitted this sensor into my engine, by putting the sensor into one of the hoses, and having the lead coming out under the jubilee clip.
Working perfectly for 5 years now.
Working perfectly for 5 years now.
colind3782
Well-known member
I have a couple of those lying around and they're quite useful for various applications. Did the jubilee clip tighten down enough to stop any leaking past the lead?
jamie N
Well-known member
Yes it does, but using a 'bit' of shower sealant/sikaflex stuff around the 'vulnerable' piece does no harm either.
cmedsailor
Well-known member
Is this the bolt you remove in order to connect a sensor for the coolant temperature?
Laysula
Well-known member
Do you have the display inside or outside the boat? Is it waterproof?
PaulRainbow
Well-known member
Yes, it is.
dunedin
Well-known member
OK Paul next question, what do you fit in there to get a working temp gauge (I have a D2-55 which presumably is very similar)
Beneteau381
Well-known member
IIRC after some research on MDI boxes, the thread is 5/8 unf
PaulRainbow
Well-known member
Basically the same as far as instruments go. Depends what you have in mind for the temperature gauge, it might be possible to retrofit the same gauge as the engine would have had if it had been turned out with the "deluxe" instruments. I've never done this, so i'm going from my workshop manual here. The sensor has a single wire that connects to pin 5 of the MDI. At the panels end, the tacho connects to all of the other instruments. Perhaps have a word with your local Volvo dealer to see what parts you'd need, although i suspect you'll need to sell a kidney to pay for them.
Other alternative is to use a standard gauge and sensor from VDO or Farrier. In which case you just need the sensor, gauge and some wiring. Make sure you match the sensor to the gauge.
The thread should be M18X1.5
PaulRainbow
Well-known member
Marine Parts Europe list it as M18X1.5
jamie N
Well-known member
Usually, it's inside that viewing port and perfectly visible, but the 'blu-tak' that had held it for yonks had fallen off on this day! To answer your question, it's inside as it's in no way weatherproof.
Laysula
Well-known member
Cheers
jamie N
Well-known member
Better picture of it now. I made a wee housing for it, combining it with the Voltmeter and a couple of LED's for my own engine diaphragm pump cooling system.
Looking at it now, I need to tidy up the housing!
Looking at it now, I need to tidy up the housing!
dunedin
Well-known member
Thanks. Sounds like would definitely be the alternative route. Not urgent for me, but something which didn’t need to fit a separate gauge but went to phone by Bluetooth or into plotter would save space. Something for me to keep an eye out for.
cmedsailor
Well-known member
Actually not a bad idea at all and very cheap. But when you say put the sensor into one
of the hoses what do you mean? What hoses. Raw water hoses going to the boiler and the sensor is touching them so to measure the temperature?
PaulRainbow
Well-known member
The hose going to t the thermostat is at block temp.
