Oil temperature

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Jegs

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The gauge on the boat measures, I understand, the temperature of the cooling water, but since the oil is cooled by the water I wonder if the oil's temp. is similar.
The manual gives a range of 75 to 90 C & I wonder if the oil is affected by being at such a high temperature. Specified oil CD, use Shell Helix hx5 CF.

Just call me paranoid of Volvo?

TIA

John G
 
Jegs said:
The gauge on the boat measures, I understand, the temperature of the cooling water, but since the oil is cooled by the water I wonder if the oil's temp. is similar.
The manual gives a range of 75 to 90 C & I wonder if the oil is affected by being at such a high temperature. Specified oil CD, use Shell Helix hx5 CF.

Just call me paranoid of Volvo?

TIA

John G
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the engine oil will be similar to the engine temp as thats where the oils is
 
If you to have an oil temperature gauge, the main thing you would see would be the oil temp being a bit lower than the water temp, and taking longer to warm up than the water.

So possibly not a good idea to use Max Throttle until a few minutes after the water temp shows normal running temp?
 
According to the interweb
''In diesel engines the top ring can expose the oil to temperatures over 315 °C''
 
The oil temp at normal running will be higher than the coolant, otherwise the coolant would warm up the oil when normal running.

Some Volvo engines like the 61 71 72/3/4/5 have oil coolers cooled by the closed circuit cooling, others have sea water cooled coolers.

Ive never measured the temp of oil, though In can tell you my last car an Audi a6 tdi had an oil temp sensor and dash temp gauge which ran at 120 degC at normal running.
 
Jegs said:
The gauge on the boat measures, I understand, the temperature of the cooling water, but since the oil is cooled by the water I wonder if the oil's temp. is similar.
The manual gives a range of 75 to 90 C & I wonder if the oil is affected by being at such a high temperature. Specified oil CD, use Shell Helix hx5 CF.

Just call me paranoid of Volvo?

TIA

John G
Click to expand...

Your Shell Helix HX5 just perfect. Higher grade lube will not help you.

#1 Are your gauges telling the truth?

#2 Lube runs higher than jacket coolant temp.

#3 In setting up electronic perameters for heavy duty diesel engines, in consultation with lubricant manufacturers we established anything OVER 121 degrees C as trigger point for fault code.

Rest easy
 
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I have oil temperature fed over N2K with all the other engine data and find the oil temperature lags just behind the coolant temperature during initial warm up and then ovetakes it once the motor is up to temperature, the highest I have seen is 105 (VP D4)
 
Latestarter1 said:
In setting up electronic perameters for heavy duty diesel engines, in consultation with lubricant manufacturers we established anything OVER 121 degrees C as trigger point for fault code.
Click to expand...
Interesting. I've seen some petrol engines where it was recommended to NOT run them hard BELOW 110 C... :eek:
 
Latestarter1 said:
#3 In setting up electronic perameters for heavy duty diesel engines, in consultation with lubricant manufacturers we established anything OVER 121 degrees C as trigger point for fault code.

Rest easy
Click to expand...

LS, for me it depends where the oil temp is measured, and I am assuming your 121 C is bulk oil temp. It will of course be much higher than this where working as a lube. The water coolant mix never gets to the really hot places in an engine!
 
rafiki_ said:
LS, for me it depends where the oil temp is measured, and I am assuming your 121 C is bulk oil temp. It will of course be much higher than this where working as a lube. The water coolant mix never gets to the really hot places in an engine!
Click to expand...

Looking at European engines in the 6/9 liter node, industry standard is to place lube oil temperature sensor in the main oil rifle i.e where it is just about to go to work having just taken a trip around the lube cooler and filter.

From the main oil rifle lube has a few routes #1 priority is to crank and rod bearings. #2 priority is piston cooling, over the last 20 years higher specific output has been obtained by increasing coolant load on lube oil specifically pistons.

Most modern pistons have Mahle pattern 'cocktail shaker' arrangement inside crown where lube is retained for a short time after being hit by piston cooling jet. The oil from the piston crown returns to the pan mad ot! Tribologists far smarter than me arrived at the conclusion that 121 C was the maximum temperature at which lube could be asked to perform its vital tasks and still perform again when cooled and filtered without going into shear.

As to Audi/VW diesel and gasoline with clear warnings in the handbook not to give them tight wire until they show lube temperature never bothered understand it as I do no do boutique motors.
 
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Latestarter1 said:
Looking at European engines in the 6/9 liter node, industry standard is to place lube oil temperature sensor in the main oil rifle i.e where it is just about to go to work having just taken a trip around the lube cooler and filter.

From the main oil rifle lube has a few routes #1 priority is to crank and rod bearings. #2 priority is piston cooling, over the last 20 years higher specific output has been obtained by increasing coolant load on lube oil specifically pistons.

Most modern pistons have Mahle pattern 'cocktail shaker' arrangement inside crown where lube is retained for a short time after being hit by piston cooling jet. The oil from the piston crown returns to the pan mad ot! Tribologists far smarter than me arrived at the conclusion that 121 C was the maximum temperature at which lube could be asked to perform its vital tasks and still perform again when cooled and filtered without going into shear.

As to Audi/VW diesel and gasoline with clear warnings in the handbook not to give them tight wire until they show lube temperature never bothered understand it as I do no do boutique motors.
Click to expand...

Yes, we are on the same page.
 
MapisM said:
Interesting. I've seen some petrol engines where it was recommended to NOT run them hard BELOW 110 C... :eek:
Click to expand...

Can you give some examples? 110C is very hot for normal road driving! 80C is warm enough for high performance engines.

Is the engine oil cooler on a boat engine thermostatically controlled? Does the engine water help warm the engine oil through a modine?

Anders
 
I was actually talking of boat engines, but rather extreme ones.
There are various builders in the US who make some crazy stuff, for people demanding 1500+ hp per side just for the sake of it: Pfaff, Teague, Young, to name a few.
And in these cases, 230°F is pretty much the norm for engine oil.

Re. your other Qs, I'm pretty sure that the oil cooler is thermostatically controlled on these engines, but I don't know if the closed circuit water is normally used to speed up the oil warming.
I can ask an expert, if you wish.
He could even build a couple of these monsters for you, if you're willing to get rid of some 6 figures piles of $$$... :D
 
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