Race Car Engine Diapers

An engine diaper collects and prevents oil, coolant, and engine debris from falling onto the track surface during engine failure. During an engine failure, fluids leak from the engine and parts that have disintegrated explode from the block and oil pan. Engine diapers help increase driver safety by preventing a slippery surface that can cause the rear tires to lose traction. It also aids in preventing a tire blowout due to running over sharp debris that separates from the engine and falls in front of the tires.

Depending on the race class you participate in, a car diaper may be required. During tech inspection, it will be confirmed (if required) in order for you to be allowed to race. Having the correct engine diaper for your class will result in getting you one step closer to the starting line.

An engine diaper (sometimes referred to as an "engine blanket") is a large pad, typically made from heavy-duty or ballistic nylon, which is held underneath an engine oil pan with straps that attach to the engine block or cylinder heads, primarily in performance racing applications. Its purpose is to catch and absorb leaking fluids as well as damaged engine parts, typically caused by engine failure while racing. The diaper prevents the fluids from reaching the track surface, causing it to become slippery and result in loss of control of the vehicle as the rear tires make contact with oil, coolant, and other fluids or debris.

Depending on the manufacturer of the engine oil diaper, the steps to install it can change. However, in most cases, the first step is to lay the replacement absorbent pad in the bottom of the engine diaper. The diaper is then centered under the oil pan and secured in place with adjustable straps that attach to the block or cylinder heads with bolts. The straps are then adjusted via plastic buckles so that the diaper is tightly in place and centered, ready to absorb and collect debris and fluids.

To avoid damage to the engine diaper, following the manufacturer's cleaning instructions is strongly recommended. In most cases, absorbing all of the oil from the diaper is done first. Then a bucket of hot water with a mild detergent can be used with a mildly abrasive brush that will not cause damage to clean the diaper. Once cleaned, it can be hung to dry. In some cases, more aggressive cleaning agents and tools will be needed.

When the race event rules call for it or you want the added safety and protection, purchase an engine diaper or belly pan from JEGS. Engine diapers help absorb leaking fluids and collect engine debris during serious engine failures, keeping the track in front of your rear tires clear of hazards that could puncture them or cause loss of traction. View our wide selection of custom and universal (including SFI-approved and 4 cylinder engine diaper options) engine diapers for your street or race vehicle today!