SOHC.co.uk Forums > CB350/400

Do four, "LINERS" make a cruise company or what any honda owner shouldn't see

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rigwit:
Well, as you may know i mentioned on getting a spare motor to use as mock up---  well got it ok as seized water had got into every bore ,pistons 1 n 4 were at top 2n3 at bottom. lots of rust which was causing the seize..  got head off after having to chisel off the two nuts between cyls 2 n 3 and  out came the heat........  got block off so stripped everything off  pump gearbox crank etc etc. so thought i might see what condition barrels were in 3 were comming up good but one  was beyond redemption  so heated block up and heres the results.................

matthewmosse:
Interesting to see the liners out, I hadn't thought they'd come out with just a bit of heat, the rear brake drum liners are cast in and need machineing out to replace. I'll have to have a futher investigation as I think as I bet I have a set with knackered liners but good fins and another with good liners and chipped fins. There are a few dismantled engines awaiting my attention in the shed so it's good to know what's possible to swap and change to make the best looking / working motor.

rigwit:
have to be carefull with the heat gentle more than blow it away  and do one at a time  ie  no 1 first  no  2 next  etc etc  should come out with a nice soft tap from a 2x4   then grip flange with pliers  an pull gently out  once its almost out  it will feel if its jammed if so wiggle it with the pliers  and should come out no prob....... obviously wear the appropriate  guantlets  or good leather gloves  and dont touch the head or liners with bare hands till air cooled  dont use any water or other fluid to cool or youl booger everything up.....  have  fun  ;D

Bryanj:
Old electric oven, put block on spacers upside down and i think 350 lets them drop out, chill replacements and drop into warm block.

NOTE:-  you are supposed to have the top of the block milled after this AND rebore the liners to ensure concentricity and perpendicular to top surface.

matthewmosse:
Or the oven in the kitchien when the wife isn't looking!. Looks like it's only worth doing if investing in a big bore kit given the ease with which good used barrels can be aquired

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