Author Topic: Engine rebuild questions  (Read 2544 times)

Offline Greg65

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Re: Engine rebuild questions
« Reply #15 on: January 20, 2018, 09:27:53 PM »
After 40 years I think it was settled, didn’t take kindly to the eviction.

Thank you so much. Drop me a PM on how you would like paying, don’t forget postage.

Greg
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

Offline Nurse Julie

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Re: Engine rebuild questions
« Reply #16 on: January 20, 2018, 09:31:13 PM »
PM sent Greg
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Drew400

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Re: Engine rebuild questions
« Reply #17 on: January 21, 2018, 03:32:44 PM »
Can't resist adding to this thread, even though I'm adding no value at all....

I tried all sorts to remove my tacho drive oil seal. In the end, I gave up (without seeking advice from this forum - mistake - and without the imagination to try the techniques recommended so far in this thread). In the end, it went to the vapour blasting people still in place. I eventually rebuilt the engine and today, three years later, it still runs fine with the barest trace of an oil leak from the tacho drive!

Gosh these things were built to last (unlike the UK competition at the time, sadly).

Cheers, D.
Previous bikes:Puch Maxi 50, CD175, Suzuki T500, CX500, Z200, GS850, XS1100, GT750 (kettle), RD400, GTR1000 (not too many boastables in there!), CB750F2 Phil Read Replica

Offline Clem2112

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Re: Engine rebuild questions
« Reply #18 on: January 22, 2018, 12:19:41 AM »
Probably on of the fiddliest jobs on the whole bike .... apart from the brake master cylinder rebuild?

It does look like it was designed to stay put for life....so I considered leaving it alone ..... but then I found I could get a new seal from DSS and thought "that £££ing seal will only start dribbling oil at some future date so out out it must come !

My thinking was that the shaft, bush and seal were pressed in so should come out by some means.
Rather than risking damage to the casting I gambled that the shaft should be strong enough along its axis at least to push the bush and seal out.

After a bit fiddling I got the circlip off - using two small screwdrivers I think?
I can remember having stop it trying to turn in the groove as I did this.... took a few attempts too.

Once the circlip ws off there's nothing to keep the shaft and bush in place but the seal I assumed , although that will have been sitting in the cover for years..overnight soak with plus-gas helped.

Used a bigger screwdriver blade wrapped in some tape and wedged it between the end face of the gear and the recess in the cover and "eased" the shaft and bush out complete with the seal. Maybe I got lucky?!




Offline Greg65

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Re: Engine rebuild questions
« Reply #19 on: January 27, 2018, 02:29:06 PM »
Progress and a temporary stop.

Visited an engine restorers yesterday with the cylinders and head. The bores all measured up well with minimal wear, I even got them deglazed. He cast his eyes across the cam shaft and passed them as fit for continued use and the head was flat. So all round good news, an interesting visit to a professional workshop and some really good tips on the rebuild.

So got stuck in this morning with the intention of getting the case split. All going great until the part which said “use the clutch tool...”. Missed that so now need to order one, oh well looks like I will have to do some decorating instead. :(
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

Offline Greg65

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Re: Engine rebuild questions
« Reply #20 on: February 14, 2018, 05:09:19 PM »
Finally found time to continue the engine strip. A very satisfying moment when I got my hands on the cam chain tensioner, this being the suspect area that has lead me to strip the engine. At some time the chain has come into contact with the horse shoe at the pivot point. This has burred over the bracket and pinched the horseshoe preventing any further movement. After applying pressure it freed up and a careful clean with a needle file it’s free and functional. The only other area for concern is the drum stopper plate which shows considerable wear. I can find no obvious cause for it but would appreciate advice.

Thanks,
Greg
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

Offline Nurse Julie

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Re: Engine rebuild questions
« Reply #21 on: February 14, 2018, 06:01:04 PM »
That looks OK to me Greg by what I can see in the pic. They do have one very 'flat' pointed side, if you get my drift.
Edit
This is what they look like new Greg



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« Last Edit: February 14, 2018, 06:13:09 PM by Nurse Julie »
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Greg65

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Re: Engine rebuild questions
« Reply #22 on: February 14, 2018, 07:28:06 PM »
The oracle has spoken.

Thanks Julie, your soothing bed manner works wonders,

Greatly appreciated,
Greg
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

Offline Integra99

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Re: Engine rebuild questions
« Reply #23 on: February 16, 2018, 09:31:38 AM »

That darn cam tensioner.. nice fix. !

Offline Greg65

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Reading the tea leaves (bearing codes)
« Reply #24 on: February 28, 2018, 01:48:20 PM »
Ok, spent a chilly hour or so reading the various marks on the crankshaft and connecting rods.

So on the crankshaft I have, 1A, 1A, 1B, 1B, 1?
Connecting rods, 3D, 2D, 2D, 2D

Three of the big end shells have the code D6I-A STD and seem to have a hint of green on the side, the other has code D6F-A STD red/brown?

Can someone please confirm which shells I have?

Thanks, Greg
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

Offline Nurse Julie

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Re: Engine rebuild questions
« Reply #25 on: February 28, 2018, 04:51:18 PM »
On top of what Oddjob says, the markings on the shells mean nothing.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Greg65

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Re: Engine rebuild questions
« Reply #26 on: February 28, 2018, 05:00:27 PM »
Sorry Oddjob forgot.

ABABA.

Cheers,
Greg
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

Offline Greg65

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Re: Engine rebuild questions
« Reply #27 on: March 01, 2018, 11:16:11 AM »
Thanks for that Oddjob, I think I now understand the table and what it’s telling.

Cheers
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978


Offline Greg65

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Re: Engine rebuild questions
« Reply #29 on: April 04, 2018, 05:16:53 PM »
Thanks for the heads up Deano, I appreciate the thought. They all came out in good condition and well within limits. I am replacing the big ends and sourced all I need.

Cheers, happy bolting one and all.

Greg

Edited for typo.
« Last Edit: April 04, 2018, 05:20:12 PM by Greg65 »
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978

 

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