To normally install a block heater you must remove an expanstion/ freeze plug in tighten in the block heater. The 6 cylinder 4.2L engine unfortunately does not appear to have any such plugs. The V8 engine should have a screw in style block heater installed in the left front of the engine block just below the cylinder head.
those are frost plugs used for machining out passages during manufacturing can also be used to install block heater
Take it to a mechanic.
The heater core will not have an effect on the check engine light. See related question below for more info on misfires and engine light.
To install a block heater in a Volvo 850, first ensure the engine is cool and disconnect the battery. Locate the freeze plug on the engine block, as the heater will replace this plug; you may need to drain some coolant. Remove the freeze plug and install the block heater according to the manufacturer's instructions, ensuring a tight fit and proper seal. Finally, reconnect the battery, refill the coolant if necessary, and test the heater by plugging it in before starting the engine.
To install a block heater on a 1997 Toyota T100, first ensure the engine is cool and disconnect the battery. Locate the freeze plug on the engine block where the heater will be installed, and remove it carefully. Insert the block heater into the hole, ensuring a snug fit, and secure it according to the manufacturer's instructions. Finally, reconnect the battery and test the heater by plugging it in before starting the engine.
if you see no plug than it has neither one you have to pop out the frost plug and put in a block heater
follow the heater hose at the rear of the engine and you will find it.
To install a circulating block heater on a 302 cu in engine in an F-150, first ensure the engine is cool and disconnect the battery. Drain the engine coolant and locate the freeze plug on the engine block where the heater will be installed. Remove the freeze plug using a punch and hammer, then insert the block heater into the opening, sealing it securely. Refill the coolant, reconnect the battery, and plug in the heater to ensure proper operation.
You can get a heater that magnetically sticks to the pan and warms the engine. You can get a heater that connects to the heater hose and circulates warm engine coolant. You can also get a block heater that replaces a freeze plug. You have to decide which works best for you.
To install the heater core on a 1994 Jaguar XJS 6-cylinder, first, disconnect the battery and drain the cooling system. Remove the dashboard and any components obstructing access to the heater core, including the heater box. Carefully remove the old heater core from the heater box and replace it with the new one, ensuring proper alignment. Finally, reassemble the dashboard and components, refill the cooling system, and reconnect the battery.
To install a 2.7 engine block heater in a 2008 Dodge Avenger, first ensure the engine is cool and disconnect the battery. Locate the freeze plug on the engine block, usually on the driver's side, and remove it carefully. Insert the block heater into the opening, securing it according to the manufacturer's instructions, and reconnect the battery. Finally, plug in the heater to an electrical outlet to complete the installation.