There ya go Marin! Now, that proves there is even something that might even be of interest to you too in this thread! Thank Capthead for the post above, as well as being OP that began this interesting thread on internal engine-parts' lubricity product qualities and their various features.
When are you guys gonna realize that diesels ARE SUPPOSED to run hot!
Not overheated but the hotter the better!!!!!!
If you have read any of the threads about underloading and idling...while not all true...running a diesel cold is not good for it....much better for it to be run at its DESIGNED temp...but never hotter than the upper limit...so why would I WANT to run my engine colder than what it should??????
If it runs colder maybe I do need to use syn as it does do a better job of removing the soot...maybe right after it helped create it...
I think hot is good. Running on synthetic with the reduced friction resulting in cooler water temps probably won't affect the combustion temps where you need hot. Don't you think?
My thought pattern(s) and biggest question about engine running temperature; as it could be related to lubrications and/or thermostat:
So...
Process:
- If oil (any type) actually lubes better than another oil (any type)
- Engine's internal frictions could be reduced
- Heat produced by friction could be reduced
- Thermostat (set at specific temp-point) would close further till engine's heat level is maintained via coolant staying at thermostat's specific temp-point.
Reverse Process:
- If oil (any type) actually lubes worse than another oil (any type)
- Engine's internal frictions could be increased
- Heat produced by friction could be increased
- Thermostat (set at specific temp-point) would open further till engine's heat level is maintained via coolant staying at thermostat's specific temp-point.
Therefore: Isn't it the thermostat that actually/truly/accurately controls engine temp-point pretty much no matter how good the oil or coolant is????
Unless of course, there was complete failure of lube or coolant wherein the overheating would surpass the thermostat’s ability to maintain a lower, workable temp.
Frankly, I'm surprised the thermostats in your engines didn't catch that and keep the temps the same after the synthetic was used.
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It damn well better!!! nonono
I don't think it will Walt.
It very well may not lower the temp but the engine will have better lubrication. If in fact the engine wants to run, say at 185, and the thermostat is full open, providing all the cooling it's capable of, but not enough to bring the temp to the desired 185, doesn't it stand to reason that better lubricating of the internal workings of the engine (Not the cylinder temps) reduces friction to the point that the full open thermostat can now reduce the overall temp?
If the thermostat is suppose to hold the coolant temp at a prescribed setting, why then, does the engine cool down at a reduced throttle setting. There's Less water being pumped through the heat exchangers, etc...Shouldn't the thermostat close to maintain the preset temperature point? I agree with Capthead that reducing friction in the engine will reduce the coolant temp by a few degrees. Just enough for the thermostat, when fully opened, to accomplish its task.
I'm rather tired of all this arm chair quarterbacking so I'm going to switch my oil to a synthetic and see what happens. The possibility of incurring damage to my engine is extremely remote.
How is what I am about to do any different than you, Eric, pretty much ignoring all the anchor data that's out there and testing the damn things yourself?
If the experiment is successful, there will be a lot of faces and only 3 ones. Conversely, if it doesn't lower the coolant temp the reverse will be the case. Either way, I think it's a small price to pay to expand our collective knowledge.
I've had Cummins come out and thoroughly go through those items and many more, several times! As I stated earlier, the thermostat has been changed, a new sender installed, coolant has been changed, new Impeller, exchangers pulled and cleaned and 2 gages hooked up so as to compare both readings. (one on the panel and one with alligator clips to the sender.) The boat was tested after each of these changes, all to no avail. I talked with Tony Athens at Boat diesel, their Cummins guru, and he suggested all the things we've tried so far. Even though the temp is within the Cummins specs, (203 max) Tony and my local Cummins rep both agree that my engine runs hotter than normal. dwhatty of this forum also has a 32 IG powered by the same make and model as my engine and his runs cooler as does another forum member in Florida who has a Nordic Tug with a Cummins 330B.If I was really convinced my engine is running too hot, my first call would be to my friendly Cummins representative or mechanic. .
I've had Cummins come out and thoroughly go through those items and many more, several times! As I stated earlier, the thermostat has been changed, a new sender installed, coolant has been changed, new Impeller, exchangers pulled and cleaned and 2 gages hooked up so as to compare both readings. (one on the panel and one with alligator clips to the sender.) The boat was tested after each of these changes, all to no avail. I talked with Tony Athens at Boat diesel, their Cummins guru, and he suggested all the things we've tried so far. Even though the temp is within the Cummins specs, (203 max) Tony and my local Cummins rep both agree that my engine runs hotter than normal. dwhatty of this forum also has a 32 IG powered by the same make and model as my engine and his runs cooler as does another forum member in Florida who has a Nordic Tug with a Cummins 330B.
The only thing left to try is synthetic. (Capthead's experience) I have nothing to lose except a few bucks which will not kill me.
There's a lot of advice given on TF, possibly misguided and uninformed, which RickB used to point out. I think my experiment, no matter the result, will shed more light on the use of synthetics. Note: I don't expect to prove anything to those that run 40 year old Lehmans. They will have to do that themselves.
To quote Steve McQueen in the movie, Tom Horn, "you have my last word on the matter."
LOL Do you really think I give a rat's ass as to what other people think?Of course 4 or 5 would make some folks feel better 3 is considered to be sufficient.
Why are so many people interested in what I'm doing? It's not as if I'm putting saw dust in the differential of an old Ford to sell it! The only thing at risk here is a few hundred dollars of which I can replace by panhandling on the corner for a few days.Of course, another possibility is that's just the way your engine is......That's very possible and I considered that a few years ago.
What are you going to do if the synthetic changes nothing?
Punt! What other alternatives are their? The engine is within spec, Cummins will have no obligation!