What if I didn't pre-fill the new oil filter? - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #11 of 60 (permalink) Old 05-08-2018, 09:29 AM
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People should remember that it wasn't too long ago that there were NO spin-on oil filters for motorcycles.
There were cartridge type filters, but good luck trying to "pre-fill" that type.

Rex


EDIT: Thinking back, I don't recall if my 1st bike even had an oil filter (1960 Triumph Tiger Cub).

Last edited by rode2rouen; 05-08-2018 at 09:35 AM.
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post #12 of 60 (permalink) Old 05-08-2018, 12:04 PM Thread Starter
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Originally Posted by Ntnbutrbl View Post
You will not find prefilling in your owner's manual nor is it in my Bonneville shop manual.
Ah, but that is incorrect, sir. That is exactly what the owner's manual says to do. Which is the only reason I do it. Have never done it with any other vehicle.

So here's another thing that's come up -- literally. After my oil and filter change, I idled the bike for 30 seconds or so. Waited a while and checked my level. Added another half-litre (half-quart, approx) or so to get it up between the markings on the case. That made it four litres, in all.

I get back from a one-hour ride, put the bike back up on its centre stand -- and now I'm significantly over the proper level. Well above the lines, but still within the sight glass.

How the heck does that happen? And is it significant enough to try to siphon out some of the excess?

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post #13 of 60 (permalink) Old 05-08-2018, 12:08 PM
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What a messy job an oil change is, though, in general. I never seem to place my catch-pan in proper position, and when I remove the drain plug the stream of oil inevitably misses. And of course the plug and filter always slip through my fingers and into the catch-pan. Fishing those out of hot oil is as fun as it sounds

Cheers, and thanks.
You won't miss the drain pan if you use one of these
https://www.shoputahharley.com/produ...SABEgL2IfD_BwE
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post #14 of 60 (permalink) Old 05-08-2018, 01:18 PM
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Ah, but that is incorrect, sir. That is exactly what the owner's manual says to do. Which is the only reason I do it. Have never done it with any other vehicle.

So here's another thing that's come up -- literally. After my oil and filter change, I idled the bike for 30 seconds or so. Waited a while and checked my level. Added another half-litre (half-quart, approx) or so to get it up between the markings on the case. That made it four litres, in all.

I get back from a one-hour ride, put the bike back up on its centre stand -- and now I'm significantly over the proper level. Well above the lines, but still within the sight glass.

How the heck does that happen? And is it significant enough to try to siphon out some of the excess?
The oil drains back into the sump slowly. I check mine after it's been sitting for a while, and don't fill it above halfway in the sight glass (cold and drained down) to reduce oil blowing into the airbox. Others have different philosophies about this and will no doubt post soon; it's an oil thread, after all.

A typical oil and filter change for me involves about 3.7 or 3.8 US quarts to get it to the halfway point after it drains down. This is about 3.5 liters.

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post #15 of 60 (permalink) Old 05-08-2018, 01:21 PM
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Originally Posted by triumph rookie View Post
I get back from a one-hour ride, put the bike back up on its centre stand -- and now I'm significantly over the proper level. Well above the lines, but still within the sight glass.
Engine hot or cold when you did the second check? If the oil level is mid-glass when warm, it will rise to near the top of the glass by the time it gets cold. I have done extensive research on this subject: https://www.triumphrat.net/air-cooled...evel-cold.html
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post #16 of 60 (permalink) Old 05-08-2018, 02:36 PM
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I don't pre-fill my oil filter. It's laziness on my part and I don't really see a reason to. I did a few times for my cars and other bikes in the past, but it can get messy if I'm overzealous. So nowadays, I'll just rub some oil around the O-Ring and hand tighten the filter and call it a day.

Think about this for a minute, not only are spin on filters a newer technology (didn't exist a few decades ago), some motors (like many Subarus) have the filter in a vertical position where all the oil will drain out before you can spin it on.

I think the most important thing to do is to lube up the O-ring and wipe off any debris off the motor where the filter's O-ring comes in contact with the motor.

As far as filling up the bike, I usually fill it up to the bare minimum (sight glass 1/4 full at most) with bike on level ground, completely vertical. The oil will expand as you ride/drive. And with a overfilled crankcase, have fun cleaning the air filter. From my experiences, a bike that's way overfilled with oil will end up having a heavily soaked air filter.

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post #17 of 60 (permalink) Old 05-08-2018, 02:51 PM Thread Starter
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Hmmm, a bit of conflicting info, there: oil expands as it warms, or level increases as it cools?

I will monitor it, and the air filter, too. I still use the stock air filter, and can't imagine it being very efficient with oil on it.

Appreciate all responses.

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post #18 of 60 (permalink) Old 05-08-2018, 03:10 PM
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I fill any bike to the half way mark. Start the engine and let idle for a few moments to check for any leaks and then shut down. I'll let the engine completely cool. Take a look at the level. If still at the half way mark or slightly above, I don't add anymore oil. I will go for a normal ride and then check the oil level again after completely cooled. Then, I will add some oil to just below the upper line. I don't really pay attention to how much oil I've added in total. I usually check the oil level before each ride as well as tire pressure. I only get to ride at max, once a week.

It doesn't really matter to me what is going on with the level. Just as long as it's between the mid and upper lines. For an older high mileage bike, I would pay more attention of oil usage between changes.
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post #19 of 60 (permalink) Old 05-08-2018, 03:13 PM
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Quote:
Originally Posted by triumph rookie View Post
Hmmm, a bit of conflicting info, there: oil expands as it warms, or level increases as it cools?

It doesn't expand so much you'd notice. I'm damn temped to put a beaker of oil over a bunsen burner to prove the point.

The level rises as the engine cools because the oil trapped up in the upper motor drips back down in the sump over time.
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post #20 of 60 (permalink) Old 05-08-2018, 03:58 PM
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Originally Posted by Felony View Post
I usually check the oil level before each ride as well as tire pressure.
Same here. I do my TCLOCS check each and every time before I leave the garage. No exceptions. The bad thing about my Triumph is that it comes with a freaking dipstick. What used to take less than 5 seconds to check, now takes me a minute. Unscrew dipstick. Wipe clean with paper towel. Screw back in. Hold bike vertical. Put back back on its kickstand. Unscrew dipstick. Take the reading. Put back dipstick and screw back on. Sigh....

I want to meet the genius that said "hey, let's up a dipstick instead of a sightglass for this model".

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