with 69-90 vette. Have you started the engine? With it being only a tooth off, it might start if you rotate the distributor.
TDC dissy removed on wrong stroke?
Thread Starter
Racer
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
TDC dissy removed on wrong stroke?
OK,Dumb question time.
I have this nagging sensation I have removed the distributor,on the wrong stroke.
The TDC timing mark is lined up on the balancer,but the rotor button is pointing about 1/8 or so, past number one(lead) as I had marked on the plenum prior to removal of the dissy cap?
I have this nagging sensation I have removed the distributor,on the wrong stroke.
The TDC timing mark is lined up on the balancer,but the rotor button is pointing about 1/8 or so, past number one(lead) as I had marked on the plenum prior to removal of the dissy cap?
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
Likes: 8
From: Newport News Virginia
OK,Dumb question time.
I have this nagging sensation I have removed the distributor,on the wrong stroke.
The TDC timing mark is lined up on the balancer,but the rotor button is pointing about 1/8 or so, past number one(lead) as I had marked on the plenum prior to removal of the dissy cap?
I have this nagging sensation I have removed the distributor,on the wrong stroke.
The TDC timing mark is lined up on the balancer,but the rotor button is pointing about 1/8 or so, past number one(lead) as I had marked on the plenum prior to removal of the dissy cap?
Sounds more like you're off a tooth when you reinstalled the distributor. Did you rotate the motor at all when you had the dizzy out?
Cruising
Joined: Oct 2010
Posts: 14
Likes: 0
From: Hampton VA
I am going to make the assumption that you marked the plenum, completely removed the distributor, and if you rotated the engine, you put the balancer back to the same mark (TDC). If those are correct and you are off slightly, that means you are one gear tooth off on the distributor. Remove it, rotate it, and reinstall until it lines up with your original mark.
Thread Starter
Racer
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
I am going to make the assumption that you marked the plenum, completely removed the distributor, and if you rotated the engine, you put the balancer back to the same mark (TDC). If those are correct and you are off slightly, that means you are one gear tooth off on the distributor. Remove it, rotate it, and reinstall until it lines up with your original mark.
Yes,marked plenum at where rotor was facing prior to dissy removal,had timing mark lined at tdc,yet the rotor was facing just past number one
lead.
Felt when turning over to line up tdc on balancer,compression coming up,but compression dropped off slightly(gone over tdc?) before the timing marks lined up...hope this makes sense.
Cruising
Joined: Oct 2010
Posts: 14
Likes: 0
From: Hampton VA
I'm just a little confused now. You didn't put the distributor in yet? You are talking about the rotor and lead before removal? The rotor button would not be lined up with the #1 lead at TDC because the engine fires at 6 degrees BTDC. So that would be normal. I believe the compression should build up to TDC and not let off until after. If you are now, is it possible that you got the cam gear off a tooth when you installed the chain?
Thread Starter
Racer
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
apologize just a learning curve here.
appreciate advice
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
