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Discussion Starter #1
Can't get sight glass out. Broke glass and puctured metal backing, tried pulling with 1/4" lag screw, reset with punch and pulled very hard. New part came with metal lock ring. I don't see any lock ring or talk about one on the LT. Does my 02 have a lock ring? Reseach site before removing, now can't find info.
 

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Had planned on replacing mine next month, and had found this: don't know how to attach links, so I just copied it from another post. Hope it helps.

Very easy - just take your time no rush

On Center Stand: Drain the Engine Oil - good time to change filter

Remove engine lower section plastic ( tupperware ) on the oil sight side (which is the brake side of bike ) - real easy to do

I took a screw driver and broke the glass - tap gently as you do not want to go through the metal backing..

I used a 11-Inch Straight - 45 Degree Angle Extra Long Needle Nose Plier
( these were great when upgrading to the new throttle / cable ) reached into the metal backing - one of the holes - and pulled - this takes a lot of effort

Installing - use a 30mm socket - a rubber hammer - NO Lube makes sure this area is dry as well as the new sight glass.... this will make sense when you have it ready

GENTLY tap in sight glass - make sure there is a finger nail "lip" then you know it's all the way in...
 

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No need to break the glass,
you don't really want little shards of plastic going astray.

Get yourself a soldering iron,
the pencil types work good for this and melt a hole in the glass,
then pull it out with some kinda hook.
 

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Discussion Starter #4
SilverBuffalo said:
No need to break the glass,
you don't really want little shards of plastic going astray.

Get yourself a soldering iron,
the pencil types work good for this and melt a hole in the glass,
then pull it out with some kinda hook.
I had a hook and pulled with my foot against the centerstand. Tapped with punch to hopfully loosen and straighten, pull again. I still need to know if it has a lock ring? May have to tap it from the back?
 

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This is just a guess on my part, but if there is a retaining ring included, maybe they changed the later boxer engines to use one to help retain the sight glass. Boxer engines have always had a problem blowing the sight glasses out, thus the warning when installing them on the boxers was to do it dry, with no lubrication.

The reason is that on the boxer engines both pistons move out together, then back in together, producing compression pulses in the crankcase, which can over time cause the sight glass to be blown out.

This is not a problem on the "brick" engines (as in the LT), as there are only very minor pressure variations in the crankcase, so the new sight glass can be oiled before putting it back in to make it easier. They never blow out of the bricks.
 

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Discussion Starter #6
Thanks for all your help. Had to take the truck to work and will look again when I get home.
 

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Just a guess on my part, but if there's a snap ring, or any other retaining ring, it should go on the outside - thus prevent it from blowing "out". But like I said, just a guess.
 

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I just replaced mine about a week ago, cracked the outside class, hooked the metal backing and it pulled out without a lot of effort. Whole job took less than ten minutes. If there is a retaining clip it would have to visible on the outside but I am not aware of any. Sounds like yours is just in there VERY tight. I would suggest seeing if you can tap in from the inside as suggested above.
 

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There is no retaining ring on the LT's
they are just pressed in.
I used a seal puller and it slid out easily.
 

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Discussion Starter #10
Update, got home pulled for 10 to 20 mins from the front with no success removed the filter punched from the back side (easy access) and came out with 3 to 4 punches. Seems that almost all are removed from the front, although a few may need to be removed from the back. Like David stated the retainer ring in the parts kit is for the boxer and not the K engine. Thanks for all the help, riding the bike to work tomorrow...
 

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brianf70 said:
Just a goofy question but why change the site glass? Is the other one dirty or broken?
Frequently the plastic "glass" gets foggy to the point that oil level is simply unreadable. Never had it happen on my four LT's but I know lots of people that have. It's the sort of problem that you may never see, but if you end up being one of the unlucky ones, you'll at least know what it is and how to fix it.
 
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