SOHC.co.uk Forums > CB350/400

Cylinder head problems

<< < (2/2)

taysidedragon:

--- Quote from: Trigger on June 12, 2020, 10:38:11 AM ---Soft but, not that soft. Hard to tell how soft something is without having it in the hand. Take them off, boil a kettle and put hot water in a bowl, drop them in for a couple of minutes and should go soft but won't stay soft. Cracks are more important than softness.

--- End quote ---

There's a joke there somewhere! 😂😂

SteveD CB500K0:

--- Quote from: Trigger on June 12, 2020, 10:38:11 AM ---Soft but, not that soft.

--- End quote ---

They have to be stiff enough to support the carbs (and they ain’t light) but soft enough to push over the mounts.


Sent from my iPhone using Tapatalk

Tomb:
Be aware that when skimming heads, valve timing may be affected, added to that a worn camchain could put timing quite a way out.

Ways round this are thicker head or base gaskets. I've made copper head gaskets for this reason, and used two base gaskets or two head gaskets. On a turbo NOS race engine we use an aluminium decompression plate under the barrels.

On the flip side, I have successfully used heads with that much corrosion or damage, The compression area of the gasket is in the reinforcing around the bores, as long as the gasket is sufficiently gripped to support this reinforcing, the oil sealing can be assisted with some sealant. Try laying the gasket on the head to see how much does the sealing.

Navigation

[0] Message Index

[*] Previous page