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Don 'Mo Lurch'
Don 'Mo Lurch', Auto Mech / Electronics
Category: Chevy
Satisfied Customers: 20606
Experience:  Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
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What is the firing order for a 2.8 v6 1987 chevy s10 pick ...

Resolved Question:

What is the firing order for a 2.8 v6 1987 chevy s10 pick up motor? My son just put a new motor in his pick up and we are having trouble. Also what is the rocker arm adjustment?
Submitted: 10 years ago.
Category: Chevy
Expert:  Don 'Mo Lurch' replied 10 years ago.

1-2-3-4-5-6 Distributor rotation: clockwise


Click image to see an enlarged view


These engines utilize hydraulic valve lifters which means that a valve adjustment is NOT a regular maintenance item. The valves must only be adjusted if the rockers arms have been disturbed for any reason such as cylinder head, camshaft, pushrod or lifter removal.


If working on the 2.8L engine, adjust the intake valves of cylinders No. 1, 5 & 6 and the exhaust valves of cylinders No. 1, 2 & 3.
To adjust the valves, back-out the adjusting nut until lash can be felt at the push rod, then turn the nut until all of the lash is removed.



To determine if all of the lash is removed, turn the push rod with your fingers until the movement is removed.
When all of the lash has been removed, turn the adjuster an additional 11/2 turns; this will center the lifter plunger.




  1. Rotate the crankshaft one complete revolution and realign the timing marks; the engine is now positioned on the No. 4 firing position. This time the No. 4 cylinder valves remain closed as the timing mark approaches the scale.


  2. With the engine in the No. 4 firing position, perform the following procedures:


  3. If working on the 2.0L engine, adjust the intake valves of cylinders No. 3 & 4 and the exhaust valves of cylinders No. 2 & 4.



  4. If working on the 2.8L engine, adjust the intake valves of cylinders No. 2, 3 & 4 and the exhaust valves of cylinders No. 4, 5 & 6.



  5. Once the valves are properly set, install the remaining components





Customer: replied 10 years ago.
Reply to Lurch's Post: thank you for the firing order, do you know about the rocker arm adjustment?
Expert:  Don 'Mo Lurch' replied 10 years ago.
The Post explains Hydralic Adjustment. There is no Feeler Guage adjustment on Hydraulics.
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