Toyota debuted the sporty two-seater MR2 in 1991. However, it did not take the market by storm as the manufacturer wanted, so Toyota discontinued the vehicle after the 1995 model year. If you still have an MR2 in your driveway and it needs a new head gasket, you will need to remove most of the car's upper engine parts to reach the target area. Whether you need to replace a head gasket due to an overheated engine or worn bolts, the process is similar to replacing the gasket in other Toyota models.
Things You'll Need
- Ratchet and socket
- New head gasket
- Torque wrench
Drain the coolant. Position a clean pan beneath the radiator to catch the coolant draining from the car. Remove the negative battery cable from the terminal. Label and tag the engine components situated toward the top section.
Remove or detach the wires, spark plugs, assemblies, brackets, hoses, cables and bolts. Take out or separate the water filter, cowl top panel in the front, alternator, air cleaner assembly, accelerator cable, the middle exhaust pipe, exhaust manifold support, ignition coil, camshaft position sensor, fuel injectors, intake manifold, timing chain cover, camshaft sprockets and camshaft.
Loosen the cylinder head bolts in a circular sequence starting with the corners and work toward the center point of the cylinder head. Throw the old bolts away. You will install new bolts when you position the new gasket. Raise the cylinder head from out of the cylinder block. Review the cylinder head for damage, dents and leaks.
Install the new gasket face up. Install the new cylinder head bolts with your fingers. Tighten the new bolts with a torque wrench in three steps.
Torque the new bolts for the cylinder head to 22 foot-lbs. Turn the bolts an extra 90 degrees for the second pass. Pivot the bolts another 90 degrees in the third pass. The tighten bolt numbers for the Toyota MR2 with a 1NZ-FE engine on the top row are 8, 4, 2, 5 and 9 from left to right. The bottom bolt numbers from left to right are 10, 6, 1, 3 and 7.
Return the engine part back under the hood of the Toyota MR2: wires, hoses, covers, caps, anchors and brackets. Look at the tag you label to help identify the components. Put coolant back in the coolant system reservoir and place new engine oil in its tank. Connect the negative battery cable to the battery terminal. Crank the engine and check for leaks.
Tips & Warnings
- An automotive manual will have illustrations to help you identify each car part.
How Hard Is It to Replace a Head Gasket?
Replacing a car engine's head gasket involves a major tear down of the engine. The procedure also calls for precise measurement of...
How to Replace the Throttle in a Toyota Camry
Since the 1980s, the Toyota Camry has embodied class, style and customer-friendly repair as Toyota has made the Camry's part-installation and replacement...
How to Fix Coolant Reservoir Tank Leaks
A coolant reservoir is a dual-purpose component. It provides the extra coolant the radiator and cooling system need in the event of...
How to Replace a Blown Head Gasket in a Toyota Truck
When a Toyota truck overheats, multiple costly problems may result. One common consequence is the cracking or failure of the cylinder head...
DIY Toyota Head Gasket
You may need to replace a busted head gasket for a number of reasons, such as old bolts, dirty bolts or an...
How to Torque a Toyota 2.7 Head
The Toyota 2.7-liter engine produces 159 horsepower and 180 foot-pounds of torque. It's the base engine of the Tacoma and the 4Runner....