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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
Just want to thank everyone who is taking the time to provide some ideas.
Update: removed exhaust and opened up cam chest and everything appeared to be done correctly, no missing/pinched o-rings, nothing note worthy. Removed the drain plug and drained the flywheel compartment. Reinstalled, ran the bike at idle for about 2-3 minutes and checked, drained at least a quart out from flywheel.
Today, I'll remove the tank and start opening the heads. Looks like breather flapper is another point to check, though I can see how I'd not have done that one right, they are pretty simple, or appear so?
Answers to other questions that were asked. I put 4 qts ran the pump till it was primed and then checked level and stopped to about 85%.
Any other ideas I should be checking into as I open the top end?
not sure what the 85% means but when i did my rebuild 4 quarts was too much.
Yep,, Them's the ones.. Only way to get to them is pull the top end off.
I took those off and put new o-rings in, reinstalled. I suppose something could have happened in the build that broke one, but I can't imagine that happened, or even how it would have happened. So, possible, but very unlikely culprit it seems.
not sure what the 85% means but when i did my rebuild 4 quarts was too much.
About 85% oil capacity. Keep in mind an external oil cooler was added, slightly increasing capacity. But an oil change on a 96" alone calls for 4 qts for oil.
Last edited by Thebikerpiper; Apr 19, 2024 at 10:58 AM.
I took those off and put new o-rings in, reinstalled. I suppose something could have happened in the build that broke one, but I can't imagine that happened, or even how it would have happened. So, possible, but very unlikely culprit it seems.
It only takes a small piece of dirt, metal, etc. to block one open. They also can loosen up if you didn't Loctite them.
I took those off and put new o-rings in, reinstalled. I suppose something could have happened in the build that broke one, but I can't imagine that happened, or even how it would have happened. So, possible, but very unlikely culprit it seems.
Well either your oil pump ain't scavenging correctly or some how you are pushing too much oil into the crankcase.
I'll assume when you pulled the cam cover the camcase probably had less than a cup of oil in it..
I guess it's possible that there is something wrong with the pump. Maybe a passage not machined or plugged? You used a Fueling pump and cam plate?
Here is a pic of a Fueling pump. Maybe the passage plug was not installed?
This a pump for early TCs but it has a connecting spigot that needs O rings on both ends.. If one is missing you got problems..
So, after checking out the cam chest and being sure nothing was out of place there I pulled the engine and started breaking her down. Everything looked good. I removed the jug carefully, but not painfully slowly. Rings were noticably out of alignment though they were oriented top side correctly and roughly 180° opposite to each other. How much displacement can be figured for when the pressure from the jug releases the ring? Enough to change position 30° or so?
Also noted the jugs wear pattern, see photo. It's distinct, what does it tell me?
In rebuilding, can these rings be reused? Anything need done to the jugs, or simply get new gaskets and seals and start rebuilding?
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