Trying to track down various oil leaks on brother's 1999 P38 Diesel which we are slowly addressing but found one on the injector pump that has only started recently and not sure how to fix it. There is a "cover plate" with cable attached, on the side of the pump above the main body with four screw fixings that looks like the gasket is leaking. Anyone know if it is safe to take this off and replace the gasket???? Cheers Mike