Question about 1996 Chevrolet K1500
There are no fasteners inside the plenum, The electrical connection for the injectors is very tight due to a rubber ring gasket the seals the injector assembly to the plenum. Carefully push down on the electrical assmbly while prying up the plenum. You also may have to remove the thermostat and hose. I've done this 3 times on my ladies 96 Yukon.
Posted on Jul 11, 2009
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Posted on Jul 11, 2009
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Posted on Jan 02, 2017
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Fig. 8: Alternator assembly installation-2.5L engine (VIN N) - Zoom Image link HERE
Aug 22, 2012 | Cars & Trucks
the negative battery cable from your Nissan Maxima. Wait at least 10 minutes in
order to prevent the engine cooling fan from causing any potential harm while
your hands are near it. Additionally, the engine must be completely cool in
order to safely remove the air intake manifold.
a screwdriver to remove the hose clamps around the air intake duct. Gently pull
the duct from the rest of the manifold.
the accelerator cable, cruise control cable, hoses and electrical connections
from the throttle body. Coolant may be lost through some of the hoses, which
can be prevented by utilizing hose clamps or plugs. Be prepared with a catch
pan underneath the hoses to collect any major spills.
the spark plug wires from both the spark plugs and the retainers on the plenum.
Unbolt the distributor cap. Use a pen and tape to label each wire with its
location so that you can easily return each wire to its exact location once the
air intake manifold has been put back in place.
the ground strap, which is attached to the upper plenum of the air intake
manifold and use a socket wrench to loosen the bolts. There are 11 bolts on the
upper intake plenum.
the upper plenum, which should still be attached to the throttle body. While
the upper plenum of the Maxima's intake manifold is removed, it is a good idea
to clean the mounting surfaces as well as the inside of the manifold with a
stiff wire and brake cleaner. Use lint-free mechanics' rags to wipe away carbon
Removing the Lower Plenum
the cooling system by inserting a catch pan beneath the radiator's drain bolt.
Unscrew the drain bolt and hold up a 3/8 hose with a funnel on the end of it to
direct the coolant to the catch pan. Open the drain fitting with a pair of
pliers and remove the radiator cap.
the radiator hose from the thermostat housing and disconnect the electrical
connections from the coolant temperature switch and the coolant temperature
sensor. Label these connections with tape and pen as described above for the
upper plenum hoses and wires.
the bolts to disconnect the coolant pipes at the transmission's end of the
the bolts on the lower manifold by turning them in 1/4-turn increments until
they can be removed by hand. The manifold may need some gentle nudging to be
released from the cylinder heads, but do not pry it loose -- doing so can cause
damage to the sealing surfaces, leading to vacuum leaks.
a scraper to remove any gasket material and sealant from the outer parts of the
manifold and cylinder heads. Clean the mating surfaces with lacquer thinner or
acetone so that a new gasket can be applied to the lower manifold.
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Fig. 14: View of the intake manifold and related components
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You will have to remove the intake manifold (this is the solid large plastic cover that covers the top of the engine when you remove the engine cover). There are many wires and small vacuum hoses to disconnect. Plus.., when re-installing, it is a common problem the manifold cracks if excessive torque is applied to the fastening bolts. And you probably should relpace the intake manifold gasket.You can then remove the thermostat assembly by disconnecting the hoses and loosening the mounting screw.
The procedure as per service manual is as follows:----
Following the Service Manual instructions, drain the coolant circuit, then remove the return pipe and the short rubber hose connected to the engine main coolant rail (1 clip at the bottom + 1 clip at the top). You remove also the outlet hose (1 clip at the engine outlet spout + 1 clip at the bottom pipe, you need to loosen the pipe mount to remove the hose). Once removed the return pipe you can undo the coolant rail: 2 (tight) bolts below the rail and the oil dipstick bolt holding the thermostat housing. Doing this without the manifold in place is simple, but its not that easy with the manifold on.... once loosened the coolant rail you can remove the thermostat housing. You open it (3 bolts) and replace the old thermostat with new. All 3 gaskets should be replaced, to minimize the risk of leaks. Apply silicone lubricant on the O-rings, then fit housing + coolant rail back in.
This will help you.Thanks.Helpmech.
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