The 1998 by means of 1990 Buick LeSabre three.eight-liter engine makes use of a timing chain, quite than a timing belt. You need to test the chain each one hundred twenty,000 miles, however not like a belt, it doesn’t must be modified except it’s rattling. Normally, it warns you that it’s going to malfunction as a result of it rattles in opposition to the timing cowl when it will get unfastened. Should you hear that, substitute the chain instantly.
Buick LeSabre Remove the Timing Chain Instructions
Disconnect the negative battery cable utilizing the applicable wrench. Set it apart, making certain that it doesn’t contact metallic. Slide the drain pan below the radiator petcock. Be certain that the engine is chilly. Loosen the petcock and take away the radiator cap. Enable the coolant to empty. Discard the coolant in an acceptable method as a result of it’s toxic for babies and animals.
Rotate the accent drive belt tensioner pulley towards the middle of the engine utilizing the acceptable socket, then raise the belt off the pulleys. Enable the tensioner to rotate again into place. Don’t let it snap into place. Rotate the tensioner together with your hand. If it doesn’t rotate freely or grinds, substitute it.
Disconnect the heater pipes utilizing the acceptable line wrench. Loosen the hose clamps on the lower radiator hose and the bypass hoses utilizing the screwdriver, then pull the hoses off the front cowl. Break the lug nuts free utilizing the lug wrench, however don’t take away them. Jack up the front of the car utilizing the flooring jack, and assist it with the jack stands. Remove the front wheels utilizing the lug wrench. Remove the interior splash defend utilizing the acceptable sockets.
Remove the crankshaft balancer retaining bolt, then take away the balancer utilizing the harmonic balancer remover. The balancer on this automobile has smaller holes than most balancers, so that you want a harmonic balancer removing instrument particularly for the Buick LeSabre. Tag the electrical connectors on the camshaft sensor, crankshaft sensor and the oil stress change. Unplug the connectors. Slide an empty drain pan below the oil pan. Remove the drain plug and permit the oil to empty out. Reinstall the drain plug. Slide the drain pan beneath the oil filter. Remove the filter utilizing the oil filter wrench. Discard the oil and filter in an acceptable method.
Remove the oil pan-to-front cowl bolts, utilizing the acceptable socket. Remove the front cowl mounting bolts, utilizing the acceptable socket; then take away the front cowl. Pry the front cowl oil seal, which is the spherical seal in the backside heart of the cowl, out of the cowl utilizing a screwdriver. Remove the gasket. Clear the gasket-mounting surfaces with the plastic scraper and store rags.
Remove the camshaft thrust button. Line up the timing marks on the sprockets till they’re as shut collectively as potential. Remove the spring and damper assembly from the heart of the crankshaft utilizing the applicable socket. Remove the camshaft sprocket bolts, then take away the sprocket and timing chain as an assembly. Remove the crankshaft sprocket utilizing the applicable socket. Clear the gasket-mounting surfaces on the engine with the scraper and rags. Clear the sprockets with the rags.
Place the timing chain the camshaft and crankshaft sprockets, ensuring the marks line up on the two sprockets. Maintain all three items collectively, then slide the assembly onto the camshaft and crankshaft. Install the camshaft sprocket bolts and tighten them to 27 foot-kilos of torque. Line up the camshaft sprocket mark with the balancer shaft mark.
Reinstall the thrust button and the spring and damper assembly. Tighten the bolt to fifteen foot-kilos of torque. Reinstall the front cowl assembly in reverse order of removing. Reinstall the negative battery cable. Tighten the petcock. Fill the radiator with 50/50 antifreeze. Install a brand new oil filter. Fill the engine with the applicable sort and quantity of oil based on the data in the proprietor’s handbook. Begin the car and permit it to come back to working temperature. Examine for leaks. When the coolant drops, the thermostat opens at regular working temperature, so prime it off.
[source ehow.com]