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Flojo's Avatar
 
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quick question: detaching hard oillines from thermostat without draining oil?

Hello,

On my SC I must change one of my broken hard oillines (from thermostat to front oil cooler).
When changing the oil cooler itself a year ago, the plug and play wrenching was no (oil) issue, as the lines ends are way up above tank oil level.

Now with the need to take off the whole oil line, I was wondering, if the oil level in the oil tank may spill oil out of the thermostat.

Just did a fresh oil change.

Must I drain first or not
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Old 09-10-2018, 05:00 AM
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You shouldn't lose that much oil
Old 09-10-2018, 05:36 AM
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Spilling oil is going to be the least of your concern. Getting that oil line off the thermostat can be quite the challenge.
Old 09-10-2018, 05:43 AM
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Quote:
Originally Posted by old man neri View Post
Getting that oil line off the thermostat can be quite the challenge.
There I have no worries.
They were off the thermostat once about 5 years ago, so not glued together anymore like some others sticking 30+ years together.
Secondly, as I will not save the old oil line, I will cut it behind the srew and so I can grip it nicely with a 36 to unwind it.
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Old 09-10-2018, 05:54 AM
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Quote:
Originally Posted by Dpmulvan View Post
You shouldn't lose that much oil
how much is "that much"?
What bucket size should I have at hand?
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Old 09-10-2018, 05:54 AM
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When I removed mine(I dropped the thermostat and all the lines together) there was a lot more oil than I imagined in the lines, and their size and shape made draining into a bucket a challenge. Just plan on making a mess.
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Old 09-10-2018, 07:10 AM
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If the engine is cold there will be no flow of oil from the tank to the lines, the only oil that will spill is the one from the line to cooler to the thermostat. I assume less than a liter of oil will be spilled.
Old 09-10-2018, 11:10 AM
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Quote:
Originally Posted by donporfi View Post
If the engine is cold there will be no flow of oil from the tank to the lines, the only oil that will spill is the one from the line to cooler to the thermostat. I assume less than a liter of oil will be spilled.
It is my understanding that there is always oil in the lines. The thermostat opens the return side when warm, causing circulation but the line from the thermostat to cooler is always open.
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Old 09-10-2018, 01:03 PM
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Correct........

Quote:
Originally Posted by QueWhy View Post
It is my understanding that there is always oil in the lines. The thermostat opens the return side when warm, causing circulation but the line from the thermostat to cooler is always open.


You are indeed correct. The 2 hard oil lines to the auxiliary cooler and the cooler itself will be filled with oil as soon as you run the engine. Even after draining the oil from the engine, the residual oil would be still be present in the auxiliary cooler and oil lines.

Tony
Old 09-10-2018, 01:41 PM
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Still think it will be no more than a liter.
Have available a 15 quart oil pan and you will be on the safe side.
Old 09-10-2018, 02:25 PM
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Ok, thank you all. Cheers!
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Old 09-11-2018, 01:15 AM
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It all went as planned, quit quick and easy.
About 1l of oil spilled out of the line. Caught it in a flat bucket.

Thanks!





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Old 09-12-2018, 12:45 PM
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Thanks for letting us know there was not a major oil spill.
Old 09-12-2018, 01:12 PM
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