Question about 2000 Pontiac Grand Am GT

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I took the motor down to the heads the valve push rods got mixed up i need to know the order they go in i know the exhaust is longer than the intake what i don't know is the order they go in. after i put the motor together it runs but it is very rough so i think i may have the rods mixed up

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I presume you have the service manual. it should say in there. the running rough may be more a timing issue

Posted on Sep 07, 2009

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Push rod diagram


Exhaust push rods are longer
  • 6.0740 Inch Overall Length
  • Standard Size
  • Intake valves are
  • 5.7460 Inch Overall Length
  • Standard Size. Front head.
front head standing in front of car passenger to driver side
Ex , in ,in Ex ,in Ex

rear head standing in front of car passenger to driver side
Ex. ,In , Ex , In , In , Ex

remember exhaust push rods are longer
Rocker arm bolt ................................ 124 lb. in.plus 30 degrees

Apr 21, 2014 | 1999 Pontiac Grand Am GT

1 Answer

Replaced the heads with rebuilt heads on a 2000 Malibu . Idles a little rough and the exhaulst suxs back in too. Iv replaced all spark plugs and wires and new gaskets all the way up. What could cause this...


These engines have different size push rods for the exhaust valve, did you mix them up by mistake, that is a common problem, i am almost positive that exhaust push rods are a little longer than the intake ones, good day, let me know.

Oct 01, 2012 | Cars & Trucks

2 Answers

Diagram for push rod instlation


Lay your pushrods in a row exactly like you removed them and work backwards to install them if you want each pushrod to set with its original lifter.

Sep 10, 2012 | 2001 Buick Century

1 Answer

A cylinder head valve arrangement


look at the ports on the exhaust manifold and compare them to the ports on the cylinder head, some times one manifold port will service two valves.

Apr 03, 2017 | 1996 Buick Century

1 Answer

98 oldsmobile achieva front head push rod order


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....

Apr 21, 2012 | 1998 Oldsmobile Achieva

1 Answer

I have a 96 pontiac grand am the push rods got mixed up when i replace the intake gasket no i bought new rods I dont know the order that they go in


stand all rods up on a table top, there should be 6 short and 6 long, the short rods go to the intake valves and the long rods go to the exhaust valves.not sure which is the intake and exhaust then with the intake off look into the intake holes if you can see the valve in there then that is the intake valve.

Mar 17, 2011 | 1996 Pontiac Grand Am

2 Answers

00 buick century 3.1 70,000mile just had a head job done, car is missing on # 1 and 5 cyclinder, wen i tighten the rocker arms i have no compression, but wen i lossing it then i got compression i change...


There are two different size push rods on that engine. The longer ones are for the exhaust valves. If you have an exhaust push rod switched with an intake push rod it can cause the problem you are describing. Usually you will bend a valve when you get them mixed up.

Jan 23, 2011 | Buick Century Cars & Trucks

2 Answers

I have a 1999 Buick Century V6 3100 that I had to replace the intake gaskets due to antifreeze leaking into and out of the engine. When I had it all apart I noticed the very first lifter #2 cylinder...


If the engine oil was full of antifreeze when the intake gasket went bad, then there is a good chance that there may be some cam and/or lifter damage. A more likely cause of your problem would be that the push rods got mixed up when you put it back together. The intake and exhaust rods are different lengths. If this is the case, and you have turned the engine over, there is a good chance that you now also have a bent pushrod and intake valve. The exhaust pushrod is the longer one and if you mix them up, the piston will contact the intake valve because it will not be able to close due to the longer pushrod. This will bend or break the pushrod and bend the valve stem.

Jan 16, 2011 | 1999 Buick Century

1 Answer

Need to know order of push rod 1994 pontiac grand am 3.1 engin from the front off the engin need to know were intake and exhaust push rods go


try looking for the configuration of the intake to head ports and if youcan see in the heads the holes going to the exhaust ports should be were the exhaust push rods go.

Jan 31, 2010 | 1994 Pontiac Grand Am

3 Answers

Which is longer intake or exhast buick3.1


Important: Place the valve train parts in a rack in order to ensure that they are installed in the same location from which they were removed. Intake pushrods measure 144.18 mm (5.68 in) long. Exhaust pushrods measure 152.51 mm (6.0 in) long

Mar 28, 2009 | 1999 Oldsmobile Cutlass

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