Compression series 3 2:25 petrol

Richard Cook said:

Hello chaps,

Quick question if I may. My series runs really well but the valve stem seals are on there way out so I'm thinking about putting on a turners unleaded head. Yesterday I checked compression and got 120 psi (dry) on all cylinders. The landy pulls great and runs really well less for the puff of blue smoke on start up from the leaky valve stems. I know the manual stated that compression should between 160_170psi but should I wait to change piston rings etc.

Many thanks

Rich

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Gun7354 said:

Yes; foot to the floor and cranked over. each cylinder was spot on 120 PSI. Im thinking the cylinder head could be causing the lack of compression also. But i'm completely open to all advice from you all.

many thanks

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