SOHC.co.uk Forums > CB350/400

How far to go with engine strip downs - being sensible about old seals etc

<< < (3/3)

McCabe-Thiele (Ted):

--- Quote from: Trigger on September 26, 2020, 06:07:02 PM ---Base gasket NOT head gasket  ;)

Just pull the barrels off, you won't find a dead body under them  ::)

--- End quote ---

I am confused if I understand you right if you remove the cylinder head you also have to replace the base gasket by removing the barrels - can you remove the barrels with the pistons in place or do you have to then when replacing the base gasket then somehow get the pistons back in place surely not from the bottom? On cars I have only put pistons back in from the top of the engine block?

On the one hand I can see the benefits of checking the condition of the pistons by removing them but if compression is good, oil consumption is okay why run the risk of breaking a ring when you put them back?

Forgive me if I sound thick but back in prehistoric times when I was a teenager I have done a few bike cylinder head removals for decoking etc but never removed the barrels. Maybe that's why my old Triumph 21 always leaked oil !!

Ignore my question above I've just read NJ's rebuild section circa P25 and  seen the brilliant photos - made me gulp a bit!
I'm very impressed with the cleaning & engine assembly posts.

Bryanj:
Multi cylinder Hondas are better built than old brit stuff and when you release the head bolt tension you also release the clamping force on the base, when you wiggle the head off chances are you move the cylinders a bit so the base gasket will leak.
I dont understand your question about pistons, you cant do anything to them without removing cylinders first

McCabe-Thiele (Ted):

--- Quote from: Bryanj on September 27, 2020, 07:42:13 AM ---Multi cylinder Hondas are better built than old brit stuff and when you release the head bolt tension you also release the clamping force on the base, when you wiggle the head off chances are you move the cylinders a bit so the base gasket will leak.
I dont understand your question about pistons, you cant do anything to them without removing cylinders first
[/quote
Not sure what my question was now about the pistons either  as NJs post answered it anyway.

Today I fired her up for a few minutes then checked that oil was reaching the valves etc. As I was replacing one of the tappet cover caps I was reminded how hot front pipes get!  Nice little burn mark on my right little finger..... all the Missus Wendy  did was laugh at my stupidity.
--- End quote ---

Navigation

[0] Message Index

[*] Previous page