Dizzy gear
Thread Starter
Instructor
Joined: Jul 2007
Posts: 112
Likes: 3
From: Pace fl
Dizzy gear
Can anyone tell me is .500 the size of the hole in the distributor gear or the outside circumference of the gear itself my distributor won't drop all the way down I have turned the oil pump saft and still won't go. Think I need .491
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
This depends on the year & distributor
.441 - .500 is the OD of the distributor shaft.
Or the ID of the Distributor gear bore.
But irrelevant. You are just mis-aligning the slot on the oil pump shaft. Make sure piston 1 is TDC. Use a long screwdriver or similar aim the oil pump slot at the corner of the valve cover for piston # 1 now smoothly set the distributor in. 3 teeth back from your oil pump shaft. This will align and drop in. Very close to your firing position as well.
.441 - .500 is the OD of the distributor shaft.
Or the ID of the Distributor gear bore.
But irrelevant. You are just mis-aligning the slot on the oil pump shaft. Make sure piston 1 is TDC. Use a long screwdriver or similar aim the oil pump slot at the corner of the valve cover for piston # 1 now smoothly set the distributor in. 3 teeth back from your oil pump shaft. This will align and drop in. Very close to your firing position as well.
Last edited by THE 383 admiral; Mar 15, 2015 at 05:38 PM.
Thread Starter
Instructor
Joined: Jul 2007
Posts: 112
Likes: 3
From: Pace fl
This depends on the year & distributor
.441 - .500 is the OD of the distributor shaft.
Or the ID of the Distributor gear bore.
But irrelevant. You are just mis-aligning the slot on the oil pump shaft. Make sure piston 1 is TDC. Use a long screwdriver or similar aim the oil pump slot at the corner of the valve cover for piston # 1 now smoothly set the distributor in. 3 teeth back from your oil pump shaft. This will align and drop in. Very close to your firing position as well.
.441 - .500 is the OD of the distributor shaft.
Or the ID of the Distributor gear bore.
But irrelevant. You are just mis-aligning the slot on the oil pump shaft. Make sure piston 1 is TDC. Use a long screwdriver or similar aim the oil pump slot at the corner of the valve cover for piston # 1 now smoothly set the distributor in. 3 teeth back from your oil pump shaft. This will align and drop in. Very close to your firing position as well.
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
There is no guarantee with any part or manufacturer.
This theory is just shy of impossible.
I have witnessed a cam gear off by 2deg. Chews up your Diz gear.
But never the distributor gear. This is a perfected cut. I get 1.235 OD
This theory is just shy of impossible.
I have witnessed a cam gear off by 2deg. Chews up your Diz gear.
But never the distributor gear. This is a perfected cut. I get 1.235 OD
Thread Starter
Instructor
Joined: Jul 2007
Posts: 112
Likes: 3
From: Pace fl
No I was trying to say maybe some of the brass from the cissy gear could be stuck in the cam gear like if you drill aluminum with a drill bit it can sort of form to the groves in the drill bit don't know if that's possible but I have dropped the distributor into this car many times with no problems. Btw this is a zz4 block with a zz8 cam afr heads
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Crank the engine and the distributor will drop into place when the oil pump slot lines up with the pin in the distributor gear. If it doesn't drop then you have a problem. If it does drop then you need to line up the oil pump shaft better.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Thread Starter
Instructor
Joined: Jul 2007
Posts: 112
Likes: 3
From: Pace fl
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Thread Starter
Instructor
Joined: Jul 2007
Posts: 112
Likes: 3
From: Pace fl
Thank you in advance