How do I change intake mani gasket?

[DRFT24O]

Hey i have a 91 KA24DE and my gasket is leaking and the whole car shakes. NISSAN said it would be $600 i laughed and walked away. Any place to get info on how to do this? I searched with not much luck.Thanks

[AZhitman]

Before you do this, here's a trick:

Go to an auto parts store and buy a can of STARTING FLUID.

Start your car and let it reach operating temp.

Spray starting fluid (short bursts) around the seal between the intake mani and the head.

If the engine speed fluctuates at one particular spot, make sure it's actually the gasket that's bad.

You MAY just have a vacuum leak elewhere.

[DjPantsSpecR]

yes i agree with him entirely here.

but if you gotta do this

remove everything from the top of the upper intake manifold, like fuel lines and fuel stuff, unbolt the egr crap off the top too and whatever obviously needs to come off like the throttle cables and the like

to remove that fuel rail you have to unbolt a nut on a stud nearest the firewall. someone started a thread on here a lil while back trying ot find it

so you got everything off adn it seems like the only thing holding the intake manifold on are some bolts and two studs going to the head, and two more studs and three bolts going to the lower intake manifold. you should have already removed any hoses going to the upper intake manifold, and try to remove the large vacuum hose that connects to the four hoses going to the runners

then remove all the bolts, some are just a ***** and the egr stuff and the IaCV are in the complete wrong place to make this easy to do.

you know how to remove studs right? studs appear at the outter part of the upper manifold connecting it to the head and the lower manifold. to pull a stud you need two of the same nut.

that actually sounds kinda gross...

anyway, you screw one nut down, but make sure its not sitting flat against the manifold, you want some space there. then you tighten another nut down on top of that nut. dont over tighten it or you will cross thread one or the other and ruin threads. but if its tight enough when you go to pull it out the nuts and the stud will come

thats even grosser, in facts its just nasty

anyway now's a good time to tell you i forgot to say to drain some coolant so there isnt any in the upper manifold, do that first

pull the studs and the bolts and then pull the manifold off.... depending on how your bolt removing luck is it could take you 30 minutes to get this far, or it could be 3 hours.

lay down the gaskets and then put it all back

[DRFT24O]

awesome thanks for all that! i had a mechanic take a quick look at it and he sprayed some stuff there and you could hear the air being sucked and then the car shut off and he said its a gasket.

[DRFT24O]

so with moderate mechanical experience how long should this take?

[Ni2s4s0aSnX]

2 or three hours probably.

[AZhitman]

There's also an article on our homepage regarding intake manifold diassembly / reassembly. Check it out, it's awesome.

[nismopu]

wouldnt the frontier metal intake gasket be better than the 240 paper one?

[DjPantsSpecR]

better? its not really a high failure item. you should replace them just about everytime you remove your intake manifold, but its not really and item i would worry about

but, if the metal one fits its worth a shot to try. i like paper gaskets myself because im not a huge fan of metal on metal contact, but there is always a reason for a design change, so its either cheaper or better, so i imagine its better

[pr240sx]

quick noteno need to remove fuel rail or studs.There is 2 manifold brackets that if removed, you can yank that manifold in 1 hou tops.Removing the alternator helps a lot.Use 1/4 drive. Good time to replace the PVC valve, check pvc rubber piping on the manifold, cleaning the mani itself and check/cap vaccum ports not needed.Removal of the secondarybutterflies is optional.