Question about Cars & Trucks
4m40 intake manifold gasket
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Posted on Jan 02, 2017
I have a 2003 chevy Impala and it's not so difficult. Try using a small ratchet that fits in the palm of your hand, I can't remember what it is called. To install the plugs use an extension and put a couple of the card board pieces from one of the spark plug boxes in between the new spark plug and the spark plug puller socket, this will hold the new plug in place while you work with the extension. When screwing in the plug you will have to go by feel so move the extension back and forth like a light jiggle while turning to avoid cross threading the plug. After the plug is tightened attach the ratchet and slightly torque into place.
Posted on Jan 04, 2009
SOURCE: I need to drain the
Not 100% sure but if you look up under exhaust manifold area, on block,is usually a common place. Simple hex head plug into block on most. Are you sure just pulling lower rad hose, and thermostat housing off won't get you where you need to be?
Posted on Jan 10, 2009
This is basicly a very time consuming job rather than a physically hard one to complete. In order to replace the gasket you must remove the intake plenum,throttle body, and misc. vacuum hoses. The wiring harness connections must also be disconnected. Finally the intake manifold is exposed. The bolts holding the manifold to the block are removed exposing the leaking gasket. After removing the push rods and placing them in the correct order to be replaced the gasket and sealants can be removed. Finally replace everything in reverse order. Be sure to consult a GM manual for correct bolt torch specs. The correct specs for the manifold bolts usually come with the gasket. Make sure to change your oil a few times after this job in case any coolant entered the block. Also,change the thermostat and the oil seal on the distributor half shaft cap while you have everything off. Good Luck
Posted on May 12, 2009
go to autozone.com and register free then select make year ect.
select repair info (you have to register 4 this)
step by step and photos!!!!
Posted on May 31, 2009
First off, you need to label all of the electrical and vacuum lines connecting to the intake manifold. This will make reassembly much easier. Then, there is a torque sequence to be used during disassembly and reassembly.
This image is of the TIGHTENING SEQUENCE. Reverse this to take the manifold off. This is important so that the upper intake manifold is not warped at all, which would decrease the quality of the seal. Be careful during disassembly and reassembly to avoid bending any lines or tubes. If things are in your way, disconnect them rather than pushing them to the side. This will avoid pinching inner linings which cannot be seen visually.
As for the gaskets, (as far as I am aware), Chrysler's (Dodge's) official stance on the manifold gaskets is that they are reusable. However, this is if they ALL look good under close inspection. Any tears, "melting", or other damage means the gaskets should all be replaced. They are not expensive, and I believe they all come as a set including both upper and lower gasket sets. Personally, I would recommend replacing them regardless. This would be a good preventative step to help extend the life of the vehicle. Also be sure to check the cooling line O-rings and replace them as necessary, following the criteria above.
Good luck and I hope this helps, even though I see it is a bit late.
Posted on Aug 02, 2009
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Unscrew the bolt that holds the negative connection to the Impala's
battery. Set this bolt aside for later use.
Remove the engine cover to access the intake manifold and manifold
gasket. Disconnect the throttle body inlet duct from the engine.
Twist off the radiator cap to allow draining of the coolant to flow more
smoothly. Place an empty container beneath the radiator's drain plug, and
remove this plug. Allow all of the engine coolant to drain into the empty
container. Replace the drain plug once you are finished.
Tag all of the electrical wiring and hoses before removing so that
reconnection is precise to factory settings. Remove these parts, individually,
from the intake manifold.
Loosen the bolts that hold the intake manifold to the Impala's engine
block. Lift the intake manifold from the block once all bolts have been
Use the flat-head screwdriver to pry the old intake manifold gasket from
the engine block. Discard this part once you have removed it.
Clean the engine block thoroughly with the engine degreaser and linen
cloth. If necessary, use a gasket scraper to remove excess buildup and grime.
Place the old intake manifold on top of the newly-installed manifold
gasket until it aligns with all of the holes of the cylinder flanges and
Attach all of the bolts with your hand to the manifold. Once all bolts
have been positioned, use a torque wrench and apply 15 foot-pounds of pressure
to the bolts to secure the manifold into place.
Reconnect all of the necessary hoses and electrical wiring to the
intake. Pour the engine coolant back into the radiator.
Reattach the engine cover on top of the intake manifold and engine
block. Start the Impala's engine and check for any leaks around the new intake
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