Pre-Oiling 7MGTE Before First Start After Rebuild

Engineintermediate✓ Community Verified

Problem

After rebuilding a 7M engine, need to build oil pressure before the first start to protect bearings and internal components from running dry during initial cranking.

Freshly rebuilt engine with no oil pressure built upConcern about dry cylinders and bearings during first crankNeed to circulate oil before introducing fuel and combustion

Root Cause

After an engine rebuild, the oil galleries, bearings, and oil pump are dry. Running the engine without pre-oiling can cause premature wear or damage to freshly machined surfaces during the several seconds it takes for oil pressure to build.

Confidence

Moderate confidence — Multiple community members agreed on this solution

View Original Thread →Posted September 2021 on SupraForums.com