76 CB360, Cherry Bomb at Barber's

[trek97]

Re: 76 CB360, before & after

Frogman, I think when you do open things up for inspection. Check the new bearing hole real close for any accumulation of crud. and maybe consider adding an exit. If particles larger than the cam to bearing clearance try to pass. they will either accumulate (clog) or get ground into cam/bearing surface.
Also check the one that you JB welded shut.
On, PJs drilled cam any crud has an opportunity to exit everytime the hole spins past the journals honda has beveled into the head.

 

[frogman]

Re: 76 CB360, before & after

The inside of my engine was spotless when I put it back together the first time, I did the manual break in procedure. The head got changed about 1500 miles from then and all I have ever run in the thing was rotella, so it should still be pretty spotless. I stay off gravel roads for the most part and have brand new OEM airfilters on the bike.

My thought might be to carve a slight relief under the cam so that the oil can go under just a bit.

But yeah will be checking, I have oil to change on the wife's car the lawn tractor and my bike to do some time this month. :

 

[axeugene27]

Re: 76 CB360, before & after

I am intrigued by this thread. Did honda really do such a poor job designing the oil delivery system in the 360 motor?

 

[trek97]

Re: 76 CB360, before & after

I am intrigued by this thread. Did honda really do such a poor job designing the oil delivery system in the 360 motor?

I dont know...LOL all three heads I got do show a little bit of wear. On the center cam bearing.
I mean The bike has only been around for 36 years. On dusty Illinois country roads.
I dont think it would be a stretch for this machine to last for atleast 1250 years and 1,496,000 miles? Before needing an oil change!
I mean really "whats Honda thinking...ONLY 36 years?"

 

[crazypj]

Re: 76 CB360, before & after

Honda expected people to follow service instructions and have bike dealer serviced, plus, it was expected to be used in the city, hit red-line to about 30~50mph, then wait for next traffic light, etc.
It wasn't designed for sustained high rpm operation.
If you hit red-line or higher for a few seconds, the problems don't occur.

It's OK to use ZDDP on pins but DON'T use it on piston rings, they wil likely never bed in if you do

 

[loganrm]

Re: 76 CB360, before & after

I am intrigued by this thread. Did honda really do such a poor job designing the oil delivery system in the 360 motor?

Look at the last few pages of my 360 build....yeah, I guess they did.

 

[Sonreir]

Re: 76 CB360, before & after

It's not the oiling system so much as the pressure valve located in the right crank case.

 

[trek97]

Re: 76 CB360, before & after

It's OK to use ZDDP on pins but DON'T use it on piston rings, they wil likely never bed in if you do

Please let me get this straight...
Use ZDDP on pins, and skirts.
Nothing on rings or cylinder walls!?!?! bone dry? nada? zip? nuttin?

 

[trek97]

Re: 76 CB360, before & after

The inside of my engine was spotless when I put it back together the first time, I did the manual break in procedure. The head got changed about 1500 miles from then and all I have ever run in the thing was rotella, so it should still be pretty spotless. I stay off gravel roads for the most part and have brand new OEM airfilters on the bike.

My thought might be to carve a slight relief under the cam so that the oil can go under just a bit.

But yeah will be checking, I have oil to change on the wife's car the lawn tractor and my bike to do some time this month. :

Hey frogman. I want to apologize if I have offended you. I am not insinuating you did a bad job on your build or anything remotely like that. I was thinking down the road. a long time from now. when motors get dirty.
My first impressions of you are quite the opposite. So far I am nothing but impressed w any and all input you have offered up.
Its PJ and his bone dry rings and walls thats got me freaking out! LOL.
that info just seems to hold Major shock factor for me anyway. I read it to my buddy Vince...who knows even less about all this stuff than I do. and he totally just looked at me cross eyed. LOL

 

[frogman]

Re: 76 CB360, before & after

No worries man, just here to learn like the rest of us, my poor motor had 21k miles on it when I got it, PO had parked it because of what looked like fouled oil and a plugged oil filter pick up screen. IE lack of oil pressure pretty much all over, even the crank was shot. BELIEVE me I soaked and scrubbed that engine spotless before it went back together, hell it had about a 1/4" of sludge coating the entire bottom and at least that much in the filter.

Funny thing is, I think it died around 21k BECAUSE of the cam chain tensioner update. The guy used way too much orange RTV and I THINK lost a rag in the engine because the pick screen was coated with all kinds of fibers and there was pieces of cloth in the bottom of the crank case. : RTV looked super fresh even though the bike had sat for at least 15 years.

Now the rings, MOST of the guys that have built these smaller engines will tell you do put them in bone dry so they seat immediately and they will. Faster they seat the faster the engine is more or less broken in. Means less babying, then again there are those that say you should ride it like you stole it from the get go..... ;D

 

[crazypj]

Re: 76 CB360, before & after

Just because everyone does it, it doesn't make it right. (bit like all the oversize tyre threads ;D )
If your building a 200,000 mile motor, hone with 4~600 grit, oil bores and rings.
It will take around 10,000 miles to fully bed in (maybe more)
Engine will burn a fair bit of oil for first 500~1,000 miles, maybe pint in first 200 miles.
Oil piston skirts about halfway up from bottom, it will provide enough oil for initial start up, as soon as motor is running around 2,000 rpm plenty of oil will get thrown up cylinder to keep things lubed.
If your expecting to do 20,000 miles a year, oil everything, if, like me, you do maybe 2,000 miles or less per bike, assemble dry and maybe fit new rings in 5 yrs (I've even put piston at BDC and wiped out bores with brake cleaner)

 

[trek97]

Re: 76 CB360, before & after

Im not doing anything w cam bearing...leaving her stock. I am ready to be done. gonna get up early and get some more done.
Dry, it is then!
thanks

 

[trek97]

Re: 76 CB360, before & after

Moving forward.
got the new o rings for the oil cap and starter.

got the pistons assembled w rings in the correct orientation. I thought those little wire clips would be a pain, but they snapped in nicely.

AND I found this broken little bastard. I think it might be off the shift drum.
Or, do you recognize it from someplace else...maybe INSIDE CASE?

I can take that apart without fear of losing the bearing as long as its in neutral correct?

 

[frogman]

Re: 76 CB360, before & after

Three little o-rings, 2 behind the oil pump, one under the bottom bolt that sticks out of the front of the engine that covers the tensioner plunger.

Then there are the 3 little o-rings that go behind the screws on the stator cover.

The one that goes under the selector thingy is a couple sizes bigger than that. The bearing won't go any where, the cap and spring might.

 

[crazypj]

Re: 76 CB360, before & after

You can take the plug (#12) and spring out, won't 'loose' anything
That 'O' ring looks like oil pump or screws holding alternator cover, the #21 is about 10~12mm inner diameter

 

[trek97]

Re: 76 CB360, before & after

You can take the plug (#12) and spring out, won't 'loose' anything
That 'O' ring looks like oil pump or screws holding alternator cover, the #21 is about 10~12mm inner diameter

thanks PJ
yep its 10-12mm, not oil pump. honda manual said , if pump aint broke, dont touch it, i didnt. and I got the three from alt cover. must be that ball thingy.

 

[trek97]

Re: 76 CB360, before & after

The old lady fell asleep in her recliner after supper while we were watching Dirty Harry. I figured I might as well get some work done. Well, let the Kenmore do some of the dirty work anyway. Hopefully her nap will last an hour!

 

[trek97]

Re: 76 CB360, before & after

HA, LOL, NOT ONE OF MY BEST IDEAS!!! I was standing there when the dishwasher quit. I popped it open and the Steam just poured out. Everything is super duper clean....
But, I could see the cast bores in the jugs turning orange right before my eyes. I had my drying rag in hand...thank goodness! I started rubbing the bores fast and they dont look too bad...but got some more work to do! Ill post a pic. LOL
The aluminum looks awesome.

 

[crazypj]

Re: 76 CB360, before & after

Just showed wife pic, she said it's grounds for divorce ;D
Don't worry about surface rust dusting the cylinders, just conditioning them, it's how they opened the surface on race motors before flex hones were invented

 

[frogman]

Re: 76 CB360, before & after

YES SIRR!! The only better parts warsher next to the wife is the dishwarsher! Yes I've done it, just make sure you have a OILIY rag ready for the bores.

Carry on!!