Question about 2001 Pontiac Grand Am SE

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Sequence for the push rods for the intake & exhaust on a 2001 Grand Am GT there are 3 long ones & 3 short ones, While replacing the intake manifold gaskets, I forgot where they go!!!!

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The valves that are furthest from the intake, on the outside perimeter of the head, closest to the spark plugs are small diameter valves. These valves use the short rods. The valves that are [non-uniformly] on the interior of the head use the large diameter valves. These valves use the long push rods. This is not due to the diameter, but do to the proximity of the valve on the head with respect to the rod length required to push it. So, looking at a picture of the "front head," closest to the front of the car, from underneath will verify that diameters are small - large - large - small - large - small. Inspecting from above you should note the order of valves as outside - interior - interior - outside - interior - outside. And if you invert that same head to the "rear head" configuration (180o) it would become small - large - small - large - large - small (outside - interior - outside - interior - interior - outside).

Sequence for the push rods - 4dbbc77.jpg
dcdb90d.jpg
The answer is this:
The rear head (2-4-6) will have push-rods in the following configuration:
short - long - short - long - long - short

The front head (1-3-5) will have push-rods in the following configuration:
short - long - long - short - long - short


Posted on May 16, 2010

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Push rod diagram


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I am replacing the head gasket on my 2000 pontiac grand am 3.4L engine. The push rods got mixed up and i need to know if the shorter rods go on the intake or exhaust side?


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You are thinking too hard.

It is VERY simple. The Intake valve push rods (marked with ORANGE paint) are shorter than the exhaust valve push rods (marked with BLUE paint) If you cannot see the paint, you can always stand them up next to each other...it is pretty obvious which ones are which.

BOTH heads are EXACTLY the same - they are interchangeable. It is just that one is turned one way and the other is turned the other way so the exhaust and intake ports will be on the correct sides. (intake port towards the center of engine, exhaust port to the outboard sides of the engine.) You do not need to go searching the internet for some "order". All you have to do is LOOK AT THE HEAD to tell which valve is intake and which valve is exhaust.

So then it is as simple as: Put the short push rods on the intake and the long push rods on the exhaust....

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My son has a 3.1 v 6 Lumina engine & was replacing the head gaskets. and he may have gotten the push rods in the wrong place, for someone that has never been in a engine before it is I guest easy to...


Hello ahbryantav66,

Intake push-rods measure 144.18 mm "the short ones".
Exhaust push-rods measure 152.51 mm"the long ones".

Below is an image of the top of a 3.1; in red are the exhaust rocker arms, in blue are the intake rocker arms. The other head follows the same pattern just examine and follow the ports.

netvan_117.png

Torque the rocker arm bolts to 124 in.lbs. plus 30 degrees.

I hope this helps.

Regards,

netvan

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