pyanev

• Engine block throughly cleaned & surfaces treated
• Engine block surfaces machined flat
• Tolerances checked on wearable items
• Oil pumps inspected/replaced if necessary
• Cylinder head skimmed or replaced if necessasry
• New OEM oil seals installed
• New OEM valve seals installed
• Valve seats machined
• Valve lapped to ensure a tight seal
• Block cylinders inspected for cracks
• New cylinder liners fitted
• Cylinderds machined to factory specification
• New uprated gas nitride piston rings fitted
• Connecting rods inspected & machined if necessary
• Crank shaft crack tested, ground & polished to specifications
• New OEM big end bearings fitted
• New OEM main bearings fitted
• New OEM spec eristic head gasket fitted
• All bolts torqued to specification in accordance with Autodata
• Assembled units oil pressure tested
• Assembled units compression tested

The head and the block 

Hello i had a rebuild on my engine soon , and i have a problem when i drive the car on sport mode and after i push it a couple times the oil pressure light is starting to appear on the dash board . If you tell me what can be the problem and why its keep doing that i will be very thankfull . What could it be a oil pressure sensor or filter or something else ? Thank you