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Engine Service Tools, Gaskets and Diagnostic Gear

Engine service and diagnostic tools, with gasket sets, transmission jacks, coolant and other parts used in engine repair. 1,113 products from $3.99 to $1,039.99. Fel-Pro, SKF, Stens and more.

1,113 products from $3.99

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Tools tied to an engine family, and tools that fit any

Some engine tools are universal: compression testers, vacuum gauges and spark plug sockets. Check the adapter thread of a compression tester against your plug holes, and the socket size and thread of the plugs. Others are engine-specific: timing locks, cam and crank pins and valve tools belong to one engine family, so match the engine code, not just the make. A transmission jack should have a rated capacity well above the unit's weight, with tilt and a secure saddle.

Gasket sets, coolant and parts listed alongside the tools

Besides tools, this section includes gasket sets, seals and fluids. A valve cover gasket set is shaped for one engine family, bank and sometimes model year, and bolt patterns and spark plug tube seals differ, so use the engine code and part number. Coolant is chemistry-specific, so follow the owner's manual rather than the color. Wiring harnesses and actuators are vehicle-specific too, and listings give the years and models they fit.

Questions about Engine Service Tools, Gaskets and Diagnostic Gear

How does a compression test help diagnose an engine?
A tester threads into the spark plug hole and records the pressure each cylinder builds while the engine cranks. A cylinder far below the others points to worn rings, a leaking valve or a bad head gasket. Compare readings with the manual and with each other.
What size transmission jack do I need?
Choose a rated capacity well above the transmission's weight, then check lift height, saddle size and tilt adjustment. A half-ton jack suits many car transmissions, while heavy truck units need more. Strap the transmission to the saddle and never stand under a load held only by a jack.
Are valve cover gaskets universal?
No. They are shaped for a specific engine family and often for one bank of a V engine, and bolt patterns and plug-tube seals vary. Match the engine code and the part number, and check whether grommets, seals and bolts come with the set.