SOHC.co.uk Forums > CB350/400
How far to go with engine strip downs - being sensible about old seals etc
McCabe-Thiele (Ted):
--- Quote from: Laverda Dave on September 26, 2020, 09:43:52 AM ---I think once you remove the rocker cover and inspect the cam and rocker condition they will provide a good indication of how the engine has been previously looked after. The top end of the engine is what suffers most when oil and filter changes have been neglected.
Once you remove the head to inspect the pistons and bores you will really know what you have on your hands. Any signs of rust/scoring etc will point to a full stripdown. As a minimum I would remove the sump pan to check the primary chain, cam chain tensioner horseshoe and the tensioner plunger. The contents of the sump pan will also provide a good indication of the state of the engine.
Read Julies rebuild thread for a good example of what may be lurking around the piston area as an excellent example of how to inspect the engine and what may be lurking within.
Not to worry if you find various nasties, lots of help and advice on here. I sense a nice winter rebuild coming on....................
Good luck :)
Dave
--- End quote ---
I like the suggested starting points though I am loath to remove pistons from a bore if there is no obvious piston damage, bore scoring or top lip.
I would have been in a position to do the engine strip whilst the frame is being powder coated following full strip down - this was planned for this year. Rather than trying to rush the engine removal before I have my surgery that's scheduled within 21 days I will have to just leave things until after Christmas. My BIL has offered to help but really I want to do it all myself as its potentially challenging then rewarding taking it apart.
It will be difficult having the restraint not to get on with some of the easier jobs.
Trigger:
If you have pulled the head off you, would of disturbed the base gasket and you will need to remove the barrels to change that ;)
McCabe-Thiele (Ted):
--- Quote from: Trigger on September 26, 2020, 10:23:10 AM ---If you have pulled the head off you, would of disturbed the base gasket and you will need to remove the barrels to change that ;)
--- End quote ---
So to fix a blown head gasket involves removing the pistons anyway - I didn't realise that on my Honda.
That is food for thought.
Can you remove the barrels with the pistons in place by undoing the con rod caps or is that more trouble than it's worth Trigger?
Thanks Ted
PS I will always have a Plan C - that would be to pay to get the engine professionally rebuilt.
Trigger:
Base gasket NOT head gasket ;)
Just pull the barrels off, you won't find a dead body under them ::)
Athame57:
--- Quote from: Trigger on September 26, 2020, 06:07:02 PM ---Just pull the barrels off, you won't find a dead body under them ::)
--- End quote ---
How do you know? The Japanese have been hiding dead grandparents for decades!
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