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George H.
George H., ASE Certified Technician
Category: GM
Satisfied Customers: 18390
Experience:  15+years ASE Master W/L1 Drivability
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What position is the rotor to be facing at top dead center

Customer Question

what position is the rotor to be facing at top dead center when dropping the distributer in?
JA: What is the model/year of your GM?
Customer: 1992 k2500 , 5.7 liter
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: installing a new engine
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: 250 k , automatic
JA: Anything else you want the mechanic to know before I connect you?
Customer: nope
Submitted: 1 month ago.
Category: GM
Expert:  George H. replied 1 month ago.

Hello I will help,

The rotor will turn about 12 degrees. Mark where it points on the base of the distributor body then drop it in so it fully engages the oil pump drive and seats all the way down then mark where it is pointing then. That is how far you have to lead the position when you want it to end up pointing to #1.

You have the engine on TDC #1 on its compression stroke. You see where #1 plug wire is on the cap and mark that position on the base of the distributor then you point the rotor the amount you found in paragraph #1 before the mark you made for #1 and drop it in. Once you get the oil pump drive seated and the distributor all the way down the rotor should be pointing tio the mark you mad for the #1 plug wire.

Let me know if that is clear

Thanks

Expert:  George H. replied 1 month ago.

Were you able to get it installed? Do you still need help?