Q: with the#1 piston up were should the rotor button be pointing

asked by on

If I have the #1 piston up were should the rotor button be pointing when I pull the distributor cap off.
My car has an automatic transmission.

The rotor button should be pointing to the number 1 position on the distributor cap when the number 1 piston is at top dead center (on the compression stroke). The pistons come up two times during the combustion cycle. Once for the exhaust stroke and again on the compression stroke. The mechanical ignition timing should be set so that the rotor hits the corresponding cylinder on the compression stroke to ignite the air/fuel mixture.

If you need some assistance with this, consider YourMechanic, as a certified technician can come to your location and help you with this is person. Good luck.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. with the#1 piston up were should the rotor button be pointing

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: There is a part on the throttle body that broke, where and how would I go about finding another?

if you are referring to the plastic case that contains the "throttle position sensor" (TPS), the TPS is readily available in the new aftermarket or even as a new OEM (dealer) part. The throttle body itself, and all associated parts...

Q: Q: engine knock

If there is engine knock after running low on oil and it does not go away after putting oil in it, then the damage is done. The engine bearings are bad and more than likely ruined the crankshaft, rods, pistons....

Q: How do I properly install a transmission pan back on?

When installing the pan, the mating surfaces of the transmission and the pan should be clean, dry, and free of debris. To assure a good seal, I will usually use some brake cleaner, acetone, or any other type of solvent...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.