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Post by comstar on Oct 26, 2021 4:45:53 GMT
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Post by comstar on Oct 26, 2021 4:50:57 GMT
BTW just realised this thread is in the wrong place, my bad sorry.....will move it to technical help where it should be.
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Post by buster on Oct 26, 2021 5:53:20 GMT
the nice thing is all the cylinder studs appear to have come out, the not so nice is what looks like gasket goo on the rocker cover
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Post by johnjones on Oct 26, 2021 8:04:41 GMT
Glad you managed to free the cam sprocket and chain.
Head still on ?
So, plugs out, refit camshaft, sprocket and chain leaving the rocker carriers off. Adjust chain and your safe to rotate crank provided no bent valves, or worse, broken guides and bent chain.
A basic measurement of valve hieghts as is will show any bad valve.
Does it rotates all ok ?
You have not said if remains of cam sprocket bolts are in the camshaft...or Jammed between chain and crank, or jammed elsewhere. There is a balance chain down there.
Look down the cam chain tunnel...
Steady as you go..
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Post by johnfcbn44dx on Oct 26, 2021 13:05:17 GMT
May be a small fragment of the slightly scuffed headbolt copper washer floating about somewhere?
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Post by duffer on Oct 26, 2021 13:56:32 GMT
May be a small fragment of the slightly scuffed headbolt copper washer floating about somewhere? John's right. I would have the filter off and cut it up to see what you have in there. If the bolts came off one at time it may have been running a bit.
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Post by comstar on Oct 26, 2021 16:28:47 GMT
Cheers chaps. Not had a hunt around for the bolts yet but I will soon. I know the oil and filter etc will all have to come out before I go fishing naturally....clutch cover too and maybe even the clutch as I think that will allow more access for a magnet according to CTB.
I have a bigger concern at the moment though. Pics in a sec. Good news is cam looks in great condition and those bolts did not strip the threads on the cam...so I'm guessing they must have worked loose.
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Post by comstar on Oct 26, 2021 16:34:13 GMT
At the moment I do not want to be pulling the bottom end apart. In order to go that deep...............
A) I neither have the required skills to do that and physical help here and
B) you have to remember I do not have a workshop and all the tools some of you guys have. I'd love to work on splitting the bottom end with one of you fine chaps as I know you'd have this motor split and sorted in very little time.....sadly what with the distance etc this can't happen which is such a shame.
The best I am hoping for is to sort this current issue I came across yesterday (in some way or another your advice will be needed pics in a sec), find those pesky bolts, get it all back together and timed back up and hope for the very best. Bad news on that CM400A, guy has let me down and said he's keeping it which did put me on a downer yesterday as the text came in....but today i have renewed gusto.
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Post by comstar on Oct 26, 2021 16:40:11 GMT
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Post by comstar on Oct 26, 2021 16:42:43 GMT
So here is my current challenge. Seems locked solid and this was the reason (one of them) for the motor getting to a point and 'sticking'. I can only assume this has happened due to the sprocket coming loose?
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Post by buster on Oct 26, 2021 17:00:44 GMT
yep thats had some stick, as you said most likely due to the sprocket coming off. I wouldnt be happy trying to run that chain again, rivet link jobby?
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Post by johnjones on Oct 26, 2021 18:48:39 GMT
You have successfully overcome the first 2 problem hurdles of your SD engine problem, the jammed cam chain and sprocket and the 4 centre head bolts, where those not that tight, the head bolts I mean ?
Since the camshaft is now out of the way, have a really good look down the cam chain tunnel for damage and the missing 2 bolts.
Draining the oil would be good as you could see better and probe the sump floor with a suitable magnet.
Also examine the very clean oil ( in fact the whole engine internally is as clean, the head area is certainly, as well as your view down the dip stick hole you said ) for bits, glitter and that silver sealer...
I think you realise this engine has been apart recently, oil very clean etc...so expect anything, with silver sealer being trapped/stuck to the mesh screen primary oil filter.
I suspect the cam bolts have never been fitted as real carnage would be evident had they come loose and dropped out whilst the engine was being cranked or run, unless you have not found that carnage yet or not showing it yet.
Anyway, your next obsticals are the flywheel bolt and flywheel, clutch nut and oil pump sprocket bolt. You have been advised on how to tackle them in an earlier post, makes life easier for you.
You have skyhooks or can arrange similar when you take ( and you will, folly not to ) the heavy engine out ?
Nice painted floor you have, pity to have it dirtied by oily engine components.
Keep parts in boxes,box for head stuff, box for clutch stuff etc. Etc. Etc., You get the idea.
Having looked down the cam tunnel ( just imagine your shaving ) and seen that those missing bolts are not jammed in a chain, replace the cam, sprocket and chain without the rocker carriers ( good practise to time up but not needed ), temporarily fit some suitable bolts, you know why, plugs out and holes covered by loose rags, and, to be totally safer, slacken the top cam chain tensioner bolt, say one turn, and refit the 4 outer head bolts using washers as towers/distance pieces, with cam chain tensioned, gently and slowly see if the crank will turn...if it jams, stop.
If you have not tried to lift the head, it will be reasonably well stuck down, as will the cylinder base.
Take your time, do not rush, steady as you go...
I wonder how mangled the clutch nut is and how is the balance chain adjustment.
Make sure the cam chain is engaged/sitting in it's crank sprocket, you will be able to turn the crank sufficient for an initial test avoiding the tight bent links...
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Post by The Great High Lord Beer on Oct 26, 2021 20:18:41 GMT
Suburb knowledge and advice from fellow members in the quest to assist the mighty Prince Comstar, however our glourious leader admits his limited tools, facilities and reluctance to undertake the task in hand.
Lord Beer applauds Prince Comstars level of caution, we all know many who undertake tasks for which they are not suited only to screw things up, this here is clearly not the case.
I have no doubt our forum ruler would complete this task to a high standard, given onhand guidance, support and time.
Remove thy engine oh mighty one, set aside and use it as training with guidance from forum Jedi masters, Obi Wan Beer commands thy 👍🍺
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Post by johnjones on Oct 26, 2021 20:50:15 GMT
The few special tools needed can be purchased......skills and experience can be learned.
Best learned by actually doing it.
Time he started learning...
He has started...
An assistant when he says "press this hard please" and "pull this out when I ask please" would be good, 2 mins of an assistant's time is all that's needed, and an old skate board.
The reward, a bunch of flowers ! Every week for the next 134years !
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Post by The Great High Lord Beer on Oct 26, 2021 21:08:43 GMT
An assistant when he says "press this hard please" and "pull this out when I ask please" would be good, Ooo eeer missus Prince Comstar will be most pleased by such instructions 😄
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