Rocker cover 02/203151 Perkins, aftermarket

Rocker cover 02/203151 is an aftermarket part for the Perkins engine.

The rocker cover closes the top of the cylinder head, keeps dust and dirt out of the rocker gear and holds the oil in. It may carry the oil filler and the breather connection. A cracked or warped cover leaks even with a new gasket. Cover shape and fixing points differ between engine versions. Baffles inside the cover can help separate oil droplets from the gases going to the breather. The cover is aluminium or pressed steel, and one bent by a knock does not sit evenly on its gasket. When replacing it, check the filler cap, breather connection and bolt isolators too. The valve clearances can be checked before the cover goes back on. The cover is supplied new, with the gasket and isolators chosen separately. Check the cover shape against the part number. The gasket face must be flat.

Specifications

Compatibility

The part is listed for machines with Perkins engines. Other parts are in JCB Dieselmax engine.

Fitting

Fit the cover with a new gasket and tighten the bolts evenly from the centre outwards, since overtightening warps it. Check for leaks after starting.