volvo D9575 temp


formula40pc

formula40pc

Member
I have Volvo D9575 diesels in my '07 45. and would like to find out what other 45's with this power the
temperature the engines run at. The gauges on the electronic display show 189 deg on starboard and 192 on port,
 
They are designed to run at 185 deg. If they are running warm, which they are, go through the standard checks. You know, impeller, raw water strainer, raw water intake (make sure there is no growth inside). Lastly, back flush the heat exchangers and if necessary, have them boiled out and rodded.

Oh yeah, I forgot, if they have always run at these temperatures, you may also want to check the thermostats and the temperature sensors.
 
Group 27, I had already done all the items in first paragraph. They ran the same since I bought the boat in jan,2013. I'm thinking its gauges although the parts book calls for 186* thermostats so if they don't open til 186 the numbers aren't to far off
 
One more thing...gauges hate bad grounds or high resistance. You might try running separate grounds to the negative terminal on the temp gauges. Formula typically daisy chains the gauge grounds with the instrument back lighting grounds which is not the best idea and it has caused me problems in the past. Try turning on the instrument lights- does that change the temperature reading at all?
 
The temperature gauges don't have ground wires. They are wired directly into the Canbus with a specific IP address (they are digital, even though the readout is analog appearing). All engine and pod sensors are wired directly in the main CPU and all of the engine gauges are wired into the same bus, that comes off of the CPU (they are daisy chained), and it's the gauge address that determines the gauge function and readout. I hope and am pretty sure that the OP has checked the gauges against the IPS digital readouts before posting about this problem.

Oh, by the way, the CPU is programed to report an engine temperature of 185 degrees as long as the engine temperature is within 2 or 3 degrees of the 185 (it's called "buffering"). Only a VODIA tool connected to the CPU will report the actual engine temperature. This was done to prevent nervousness on the part of the boat owner. It seems that when digital readouts first came out people were freaking out when engines reported temperature differences of 1 or 2 degrees and driving manufacturers crazy with calls to customer service, lol.

Don't you just love it, welcome to the world of digital electronics :D.
 
Alrighty then, I guess the D9 575's are a couple of generations removed from the TAMDC 74's that I have! I didn't realize we were talking about IPS...
 
Do you have individual gauges or the LCD volvo information panels- whatever the acronym is that they are using? If you have the individual VDO gauges like I do then they are probably wired the way I described ( all 3 of my Formulas were) in which case it might be worth looking at the grounds ( all 3 of my Formulas had similar issues). In the case of my Volvo diesels Formula grafted the VDO sensors and wiring into the original Volvo harness.
 
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