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[amba]

So just for my peace of mind...intend when next do cam belt to upgrade the present cam shafts on my 2.5 to a set of 3.0 which I have recently bought.My question is ..are they just remove existing and replace with upgrades, or am I into shell bearings etc?

[amba]

Any advise guys ??

[sassanach]

just change the camshafts,straight swap.

[andyc]

cams should go into the 2.5 head but to be sure mic up the journals on both cams before fitting. If the 3.0 cam journals are bigger then you'll need to take the heads off and have the journals line bored to match the 3.0 cams

With alloy heads you don't have bearing shells because the ally expands quicker than the white metal bearings which means they they will just spin with the cams and right the heads off

The only time i've seen cam shells is in a cast iron head such as the old Opel CIH and Ford Pinto engines.


Andy