750 TSCC Rebuild or Replace?

[GSXR7ED]

Dang, Rich!

I’m just now going to bed...it’s 1:27am.

You are very much determined. Sleep well.

Ed

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[Rich82GS750TZ]

I didn’t mean to work until after midnight but I just had to get the engine all ready to go in the frame. We’ll see how long I can stand to let my teenage boys sleep before I roust them to come help dad with some heavy lifting.

[cowboyup3371]

Great job Rich; watching with interest

[dorkburger]

Nice. Glad to see the progress.,,

[Rich82GS750TZ]

WOOOOOOOO!!!!!!!!!!! (In my best Rick Flair voice). My apologies for ever doubting Steve. All rings slipped in just using my fingers. After, of course, getting the top of the rear cam chain guide stuck in the tensioner hole. Back up. And then getting the cam chain pinched between cylinders and case out the front. Back up. But then....but then. SUCCESS!!!!!! I may ride tomorrow. But I’m getting ahead of myself. I’ll take these small victories as they come.

[Rich82GS750TZ]

Be sure to clean your bores really, squeaky clean

Yep, done. Thanks. Right now I’m trying to improvise a ring compressor from strips of soda bottle plastic and zip ties. I forgot to look for hose clamps at the Hardware store today. Steve claims he just uses his fingers. I’m having no luck with that at all.

[Big T]

Be sure to clean your bores really, squeaky clean

[Burque73]

Following along here. I look forward to seeing your posts here Rich.

You'll be back on the road in no time at this rate.

[GSXR7ED]

Busy bee, aren't you...Rich?

Looking good!

Sorry I can't help you with questions. I would agree with your assessment of the HEAD gasket though...makes sense.


Ed

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[Rich82GS750TZ]

Moving forward. Further tear down of the 82 original engine revealed a front cam chain guide with scoliosis and a cracked vertebrae, right at the angle near the top.



Since the pistons and rings in the 82 engine look really good, I’m using them in rebuilding the donor 80. Remember, the donor engine had a piston with stuck rings, still soaking. eBay 1500mi pistons & rings, if they ever come (I’m having doubts) will be used if/when I rebuild the original 82 engine.

Last week, while waiting on parts, started studying about cylinder honing. Bought a bottle brush hone, and gave it a try just moments go. I think I did OK.

Before:


After:


Im ready to mount the Cylinders and Head and have questions on the gaskets.
the base gasket appears to be the same on both sides except one side is darker. Is there a top/ bottom? Doesn’t matter?



The head gasket had HEAD written on one side. It seems obvious that this side is meant to go up, and not towards the cylinders. BUT, I know what happens when I assume. So unless someone tells me otherwise, it’s HEADs up.

[Rich82GS750TZ]

Not finding much in either of my manuals about these oil passages? On both left and right sides of the base gasket surFace on the top of the engine case. They spin but don’t screw out nor in. Is there anything special I need to check with these? I blew air into them. They appear to be clear but not sure.

[Rich82GS750TZ]

Most models, from various diagrams I've looked at, have and extra brown wire for accessory lights that's not attached to anything. The "T" does not. Found a bunch of wires in the bucket that come on with the key, so I connected to one of those and ground into the turn signal ground connector. All the wires in the bucket that I tested seem to show the same, roughly -.4v difference from the measurement directly on the battery terminals. As long as I remember that, I'm OK. But I'm going to clean as many connections as I can find and see if I can minimize that drop a little more.

Thanks

[rphillips]

Relays are for things that draw a lot of current, ie. headlight or starter motor. Something as lite as a volt meter, your "82" model should have front running lights, just wire into one of the leads for them. Don't even think a larger fuse, all be good just wire it in. Just my opinion.

[Rich82GS750TZ]

All that little rubber tit does is hold the cushion in place during assembly. Almost useless cause when the driven hub is put in, the rubber cushions can't get out of place until hub is taken off again. Yeah, for $6 replace it, but if you don't, you'll never know the difference.

Kind of what I figured. Like, where's it gonna go? But, I did order it. Still waiting on my pistons/rings, base gasket, and breather gasket. Can't put the engine back together yet without those so..... I think tonight I'll look harder for a wire that's only on with the ignition in the headlamp bucket that gives me close to the battery voltage on which to connect my digital volt meter. I had it wired to the accessory screw terminals back on the fuse block, but that's always on. I want to not have to use the switch on the voltmeter and have to remember to turn it off. I've got a good wiring diagram, so I should be OK. But, if anyone's got good advice on that topic, I'm all ears. I'd rather not install a relay.

[rphillips]

All that little rubber tit does is hold the cushion in place during assembly. Almost useless cause when the driven hub is put in, the rubber cushions can't get out of place until hub is taken off again. Yeah, for $6 replace it, but if you don't, you'll never know the difference.