Engine Compression Test Cost in UAE 2026
An engine compression test is a fundamental diagnostic procedure that measures the pressure produced in each cylinder during the compression stroke. It is used to assess the internal health of an engine and identify worn piston rings, damaged valves, blown head gaskets and other internal faults that affect performance. This guide explains what the test involves and what it costs at garages across the UAE in 2026.
What Does an Engine Compression Test Involve?
The mechanic removes all spark plugs or glow plugs and inserts a compression gauge into each cylinder in turn. The engine is cranked over and the peak pressure in that cylinder is recorded. A healthy engine should show consistent readings across all cylinders within the manufacturer specification, typically between 150 and 180 PSI for most petrol engines and 300 to 400 PSI for diesel engines. Low or uneven readings indicate internal wear.
Wet vs Dry Compression Test
A dry compression test measures the existing cylinder pressure. If a low reading is detected, a wet test is performed by adding a small quantity of engine oil through the plug hole. If the reading improves significantly, the fault is with the piston rings. If the reading stays low, the valves or head gasket are more likely to blame. This distinction guides the garage toward the correct repair.
Engine Compression Test Cost in the UAE
At garages across the UAE in 2026, a standard four-cylinder engine compression test costs between AED 150 and AED 350. V6 and V8 engines with more cylinders typically cost AED 250 to AED 450. Some garages include the test within a broader engine diagnostic fee that covers an ECU scan and physical inspection. For pre-purchase vehicle inspections, the compression test is often bundled into a full vehicle report for AED 350 to AED 600.
When Should You Get an Engine Compression Test?
Request a compression test when experiencing persistent misfires, high oil consumption, blue or white exhaust smoke, loss of power or difficulty starting in cold weather. For imported used vehicles entering the UAE, a compression test is an important part of due diligence before purchase.