Replace lifters solid to hydraulic Topic is solved

[Ellyatts]

Doing valve job on 2005 s60 with solid lifters.
Can I replace lifters with Hydraulic ones?
If not I adjust valves by file down valve stem to get back to factory spec?

[jimmy57]

Hydraulic tappets are taller, as I recall, nominally 17.5 mm. Solid ones are sized in increments from 14.80mm to 16.40mm or thereabouts. If a machine shop does a head with solid bucket tappets they usually grind the stem tops to achieve the desired clearance after the valve seat grinding and angle dressing puts valve a wee bit deeper and makes clearance too tight. The Volvo prescribed way is to measure clearance and select tappets. Volvo parts sells tappets in .02mm increments in the range above. The measuring method is to do each cam one cylinder (2 valves) at a time. Volvo has a bolt on bracket that uses two head top cover bolt holes to mount the bracket that holds cam down against bearing journals. If you use one hand to hold cam down with lobe peak 180 degrees away from tappets and use a faint feel to know when the feeler gauge is in contact then you don't need the bracket tool. You could also use a large simple C clamp and a thin piece of wood. Wood against block side of head to give c clamp anvil a flat place since it ill fall into combustion chamber readily and the screw stem end bearing against cam journal. A wooden saddle helps as it gives the screw end a flat place to rest. The spec is .20mm intake and .40mm exhaust, each +/-.03mm. I always go tight as the cam will actually ride close to upper journal in head top cover as evidenced by oil varnish staining on lower journals (except front, owing to cam belt pulling that end down) and clean upper journals. If you come up with a tappet that leave an intake at .18mm then no worries, in actuality it will likely be .20 when the cam is riding higher once assembled with sealant film between halves.