Winterizing - Do you run your engine after the oil change? - SailNet Community
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post #1 of 12 Old 11-21-2014 Thread Starter
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Winterizing - Do you run your engine after the oil change?

Last night I ran the engine for 20 minutes after changing the oil and filter. Not sure if that’s the right thing to do, but I figured it’s better to get that new oil lubricating everything, rather than just sitting in the oil pan.

What's do you think is the best thing to do?

Of course, I ran antifreeze through the open circuit side of the engine during this time.

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post #2 of 12 Old 11-21-2014
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Re: Winterizing - Do you run your engine after the oil change?

Running the engine to give everything a good coating of fresh oil, and keep the corrosion at bay, is a good practice. The old contaminated oil can become acidic.

That said, I don't do it. I run the engine to warm it up, change the oil, and wait to start it until next season.


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Last edited by eherlihy; 11-21-2014 at 10:17 PM.
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post #3 of 12 Old 11-21-2014
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Re: Winterizing - Do you run your engine after the oil change?

I run it, to bring it up to temp before I drain and replace the oil.

Then, I only run it long enough to add the glycol to winterize it.
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Re: Winterizing - Do you run your engine after the oil change?

If in the water for the winter look to the thruhulls. Hoses with fresh water in them. Even closed thruhulls can burst if internals get cold enough. Outside water temp doesn't count so much. Yu dun good running the engine. Old oil does sit and eat bearings, Drain the exhaust?
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post #5 of 12 Old 11-22-2014
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Re: Winterizing - Do you run your engine after the oil change?

The primary purpose of changing oil before winter layup is for it anti-corrosive properties. You never drain 100% of the old oil, so it would seem mandatory that you run it for a bit.

I then change it again during spring commissioning, as those same anti-corrosives have degraded over the winter. That's why oil changes have both calendar time and use limits.
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post #6 of 12 Old 11-29-2014
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Re: Winterizing - Do you run your engine after the oil change?

I couldn't leave this alone (though I probably should)...

I have an '87 O'day 35 with a Universal M25.

I had some rust on the oil pan from the leaky Oberdorfer raw water pump that I fixed and documented, long ago, in another thread. I held off because access to the oil pan is "challenging" at best. The oil pan sits in a sump, so that access to it involves removing the dip-stick tube, pulling the engine, and removing the engine mounts.

This pic gives you some idea of what I was up against;

You can see the rust on the left side of the oil pan in this picture. I can almost fit my hand between the lower part of the motor mount and the top of the engine compartment. I could not reach the drain plug.

Prior to removing anything, I drained the coolant and the oil. Once the pan was removed, I was surprised to see that it easily contained 3/4 of a quart of oil. Remembering this thread, I reconnected the dip-stick tube to see what the oil level should actually be. I was surprised to learn that When the engine oil level is full, and the engine is at rest, all of the the oil is either in the oil pickup tube (which runs to the pump), in the oil galleries, or in the oil pan. When the engine oil level is full, and the engine is at rest the oil level does not enable it to touch the bearings, crankshaft, engine block, or connecting rod bearings at all!.

Just sayin'


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Last edited by eherlihy; 11-29-2014 at 04:54 PM.
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post #7 of 12 Old 11-29-2014
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Re: Winterizing - Do you run your engine after the oil change?

Hey,

I run the engine. I want to make sure that fresh oil is circulated through the engine. I also want to verify that the new oil filter gets oil pumped through, and I want to verify that I have the right amount of oil in the block.

Barry

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post #8 of 12 Old 11-29-2014
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Re: Winterizing - Do you run your engine after the oil change?

I don't run it because I don't change the oil just because it is winter.

Don't blow air up my rear, be useful and blow it at the sails!
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post #9 of 12 Old 11-29-2014
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Re: Winterizing - Do you run your engine after the oil change?

It's not necessary to run the engine to get a coating of oil on everything, it's already coated (you ran the engine to warm up the oil prior to changing it, right?). I run it to make sure the oil filter doesn't leak and to fill the filter so I can top it off correctly.
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post #10 of 12 Old 11-29-2014
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Re: Winterizing - Do you run your engine after the oil change?

Quote:
Originally Posted by jrd22 View Post
It's not necessary to run the engine to get a coating of oil on everything, it's already coated (you ran the engine to warm up the oil prior to changing it, right?). I run it to make sure the oil filter doesn't leak and to fill the filter so I can top it off correctly.
This^^.. only I mostly prefill the filter before installation so that there's no 'void' in the flow during startup. (can't totally fill it because it mounts on an angle). For engines with the filter on a horizontal axis this is probably not possible.
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