To replace a lower intake gasket on a '96 Olds Ciera with a 3.1 do you have to remove the cylinder heads to get to the lower intake manifold gasket?
You answer is NO! You do not have to take the heads off. What you will have to do is, remove the front valve cover and loosen that back one. It is best to take them both off but you can get away with just loosening the back valve cover. The valve cover on most models will have a different kind of bolt that connects it to the head. On the rear, if you choose to leave it on, you will have to loosen the bolts through it and pry it back a little bit so you can get the intake out. The bolts do not come all the way out. They are held in with a rubber grommet. You save a lot of time by leaving the alternator on and not taking the rear valve cover off. I am not sure if you have ever done one of these or not, but once you get the intake off, get prepared for a stupid engineering idea by out fellas at general motors. They have the intake gasket inter twined with the push rods. You will have to remove all the push rods that run in front of the gasket. This might not make a hole lot of sense until you actually get the intake off and see for yourself. This is where you may have a problem with the rear valve cover still being on the car. You may have to turn the motor so you will be able to get the nut off the rocker with a wrench. OR, do what I did, make my own specialty tool out of a 13mm wrench. Almost looked like a distributer wrench when I was done. Worked great!!
There is a specialty tool available for removing the push rods without removing the rear valve cover, ignition coil, alternator, rockers etc. More info at DenLorstools.com Tech Articles GM intake gasket replacement tips.
An intake manifold gasket is a malleable material that is set between the air intake manifold, the cylinder heads and the block in a gasoline powered internal combustion engine. Intake manifold gaskets prevent leakage of air or the air-fuel mixture by sealing the gap between these various metal engine parts.
It should take about an hour to change the intake manifold gasket. This part can be replaced by taking off the intake manifold cover, cleaning the old gasket off and sealing a new gasket in the space and tightening the bolts. When other things are in the way, like the alternator, it will take longer.
Where could engine coolant be leaking from on rear topside of engine on a 1998 350vortec it pours coolant out but can't see where from?
It is common for the intake manifold gasket to leak antifreeze from the corners of the intake. Need to replace intake gasket. Be sure to look closely at the intake were the gasket seals against it for pitts in the intake. There is a heater hose that goes into the intake on right rear corner in the back, but uo on top of intake. check closely. It is common for the intake manifold gasket to…
It is the sealing part that seals the intake manifold to the cylinder heads and to the top of the engine block. The intake manifold is the part that distributes the air to the cylinders. It also can house the thermostat, the injectors, the throttle plate. An intake gasket could leak coolant, engine oil, or engine vaccuum.